# Cost, performance, and capacity: ratios before prices

Last validated: 2026-08-22. Region: `eu-west-1`; currency: USD.

This chapter is a method, not a price sheet. Start with the business
denominator, capacity distribution, and correctness/SLO boundary; then
recompute from dated price rows. FinOps Unit Economics supplies denominator
and allocation discipline, while *The Frugal Architect* treats cost as a
non-functional requirement measured with other constraints
(C49,C102,C112,C113; F19,F20).

The SSE files `tier-3-differentiators/cost-optimization/{basic,theory,practical}.md`
are unverified cross-reference prompts only. Their percentages, prices,
right-sizing thresholds, and shortcuts are not inputs here.

## Optimization sequence

1. Preserve correctness and mandatory auditability.
2. Meet latency, availability, durability, RTO, and RPO objectives.
3. Remove scans, unnecessary fan-out, tiny unbatched work, over-indexing,
   retry storms, and excessive logs.
4. Tune memory, batch, retention, capacity mode, and configuration.
5. Change substrate only after measured workload evidence.

Correctness and mandatory auditability are never traded away for expected-loss arithmetic.
A projection never authorizes a financial command. Replay alone is not repair: reconcile authoritative outcomes and external effects.
These boundaries consume [Task 8](07-reliability-and-correctness.md) and
[Task 9](08-fintech-trading-architecture.md), rather than replacing them
(C105,C108–C115).

## Canonical quantitative model

The following closed block is identical to the
[research cost model](../research/cost-model.md#task-10-dated-cross-service-cost-performance-and-capacity-model).
The verifier checks row order/count, duplicate/missing/reordered rows, decimal
recomputation, rendered equality, sensitivity, and current official offer data.
Free tier, tax, support, discounts, credits, and commitments are excluded
symmetrically. Lambda uses the first x86 GB-second tier; S3 Standard the first
50-TB tier; Kinesis PUT rounds to 25 KiB and DynamoDB writes round each item to
1 KiB before multiplication. Month = 2,592,000 seconds / 720 hours; billing GB
= `2^30 B` (C49,C78,C82,C95,C113,C116; A44–A46,A75,A99,A100,A123–A127, retrieved
2026-08-22).

<!-- TASK10_CANONICAL_BEGIN -->
# official AWS prices retrieved 2026-08-22
META|task10-v1|eu-west-1|USD|2026-08-22|2592000s_720h|1GB=2^30B
PRICE|lambda_request_usd|AWSLambda|B5V2RNHAWGVJBZD3|EU-Request|none|Request|0|Inf|0.0000002000|2026-08-19T22:47:03Z|retrieved_2026-08-22|A123
PRICE|lambda_gb_second_usd|AWSLambda|SGGKTWDV7PGMPPSJ|EU-Lambda-GB-Second|none|Lambda-GB-Second|0|6000000000|0.0000166667|2026-08-19T22:47:03Z|retrieved_2026-08-22|A123
PRICE|fargate_vcpu_hour_usd|AmazonECS|K4EXFQ5YFQCP98EN|EU-Fargate-vCPU-Hours:perCPU|none|hours|0|Inf|0.0404800000|2026-07-07T16:06:51Z|retrieved_2026-08-22|A124
PRICE|fargate_gb_hour_usd|AmazonECS|UP5ETC3QSW2QZGEY|EU-Fargate-GB-Hours|none|hours|0|Inf|0.0044450000|2026-07-07T16:06:51Z|retrieved_2026-08-22|A124
PRICE|ddb_wru_usd|AmazonDynamoDB|F4EZE5SAMS3D49NJ|EU-WriteRequestUnits|PayPerRequestThroughput|WriteRequestUnits|0|Inf|0.0000007050|2026-08-15T03:52:56Z|retrieved_2026-08-22|A125
PRICE|ddb_replicated_wru_usd|AmazonDynamoDB|Y8RETJA3NHS97536|EU-ReplWriteRequestUnits|PayPerRequestThroughput|ReplicatedWriteRequestUnits|0|Inf|0.0000007050|2026-08-15T03:52:56Z|retrieved_2026-08-22|A125
PRICE|ddb_rru_usd|AmazonDynamoDB|3ERQSZWPAMX2JWHN|EU-ReadRequestUnits|PayPerRequestThroughput|ReadRequestUnits|0|Inf|0.0000001415|2026-08-15T03:52:56Z|retrieved_2026-08-22|A125
PRICE|kinesis_shard_hour_usd|AmazonKinesis|C8T9ZXPQRX6FS23J|EU-Storage-ShardHour|shardHourStorage|ShardHour|0|Inf|0.0170000000|2026-08-13T19:39:54Z|retrieved_2026-08-22|A99
PRICE|kinesis_put_payload_unit_usd|AmazonKinesis|XE5NBZYRTSWZZ8J7|EU-PutRequestPayloadUnits|PutRequest|PutRequest|0|Inf|0.0000000165|2026-08-13T19:39:54Z|retrieved_2026-08-22|A99
PRICE|kinesis_efo_consumer_shard_hour_usd|AmazonKinesis|HUJ72XPTKF8QXV6H|EU-EnhancedFanoutHour|ConsumerHour|ConsumerShardHour|0|Inf|0.0170000000|2026-08-13T19:39:54Z|retrieved_2026-08-22|A99
PRICE|kinesis_efo_gb_usd|AmazonKinesis|W6ZVCP635EBGH7N7|EU-ReadBytes|EnhancedFanoutDataRetrieval|GB|0|Inf|0.0147000000|2026-08-13T19:39:54Z|retrieved_2026-08-22|A99
PRICE|s3_standard_gb_month_usd|AmazonS3|4AJHPB29ZPVFADXP|EU-TimedStorage-ByteHrs|none|GB-Mo|0|51200|0.0230000000|2026-08-18T18:11:13Z|retrieved_2026-08-22|A126
PRICE|s3_restore_request_usd|AmazonS3|ETABQUNVVQGWUQN4|EU-Requests-Tier3|RestoreObject|Requests|0|Inf|0.0000550000|2026-08-18T18:11:13Z|retrieved_2026-08-22|A126
PRICE|s3_get_request_usd|AmazonS3|ZCQD4CM637S7D8U5|EU-Requests-Tier2|none|Requests|0|Inf|0.0000004000|2026-08-18T18:11:13Z|retrieved_2026-08-22|A126
PRICE|s3_restore_retrieval_gb_usd|AmazonS3|G6YZ6EAX5498CAQ2|EU-Standard-Retrieval-Bytes|RestoreObject|GB|0|Inf|0.0100000000|2026-08-18T18:11:13Z|retrieved_2026-08-22|A126
SETTING|region|eu-west-1|region
SETTING|currency|USD|currency
SETTING|retrieval_date|2026-08-22|date
SETTING|lambda_architecture|x86_64|architecture
SETTING|kinesis_capacity_mode|provisioned|mode
SETTING|kinesis_read_mode|EFO|mode
SETTING|replay_expired_post_reingest_read_mode|EFO|mode
SETTING|ddb_capacity_mode|on_demand|mode
SETTING|ddb_read_consistency|eventual|setting
SETTING|free_tier_tiering_commitments|excluded_symmetrically|policy
LANE|order|ddb_txn_order_kib|ddb_order_hot_share|base|transactional
LANE|idempotency|ddb_txn_idempotency_kib|ddb_idempotency_hot_share|base|transactional
LANE|outbox|ddb_txn_outbox_kib|ddb_outbox_hot_share|base|transactional
LANE|sentinel|ddb_txn_sentinel_kib|ddb_sentinel_hot_share|base|transactional
LANE|order_account_gsi|ddb_order_account_gsi_kib|ddb_order_account_gsi_hot_share|gsi|ordinary
LANE|order_status_gsi|ddb_order_status_gsi_kib|ddb_order_status_gsi_hot_share|gsi|ordinary
LANE|outbox_ready_gsi|ddb_outbox_ready_gsi_kib|ddb_outbox_ready_gsi_hot_share|gsi|ordinary
INPUT|month_seconds|2592000|s/month
INPUT|month_hours|720|h/month
INPUT|avg_orders_rps|100|requests/s
INPUT|peak_orders_rps|400|requests/s
INPUT|active_duty_cycle|0.25|ratio
INPUT|accept_rate|0.95|accepted/orders
INPUT|fills_per_accepted|1.2|fills/accepted
INPUT|market_updates_rps|5000|records/s
INPUT|peak_market_rps|8000|records/s
INPUT|burst_seconds|60|s
INPUT|payload_bytes|700|B/record
INPUT|billing_chunk_bytes|25600|B/Kinesis-PUT-payload-unit
INPUT|put_payload_chunk_bytes|25600|B/payload-unit
INPUT|fanout_consumers|3|consumers
INPUT|projection_fanout|4|projection-writes/accepted
INPUT|batch_small|1|records/invocation
INPUT|batch_medium|10|records/invocation
INPUT|batch_large|100|records/invocation
INPUT|flush_small_ms|5|ms
INPUT|flush_medium_ms|50|ms
INPUT|flush_large_ms|500|ms
INPUT|retry_rate|0.02|retries/original
INPUT|partial_failure_rate|0.01|failed-records/original
INPUT|replay_ratio|0.05|replay-records/original
INPUT|lambda_memory_gb|1|GB/invocation
INPUT|lambda_duration_s|0.08|s/invocation
INPUT|lambda_headroom|1.5|ratio
INPUT|lambda_tail_target_ms|200|ms
INPUT|lambda_measured_p99_ms|180|ms
INPUT|lambda_cold_p99_ms|350|ms
INPUT|fargate_tasks|2|tasks
INPUT|fargate_vcpu|1|vCPU/task
INPUT|fargate_memory_gb|2|GB/task
INPUT|fargate_worker_service_s|0.08|s/batch
INPUT|fargate_events_per_batch|10|events/batch
INPUT|fargate_capacity_headroom|1.5|ratio
INPUT|fargate_ha_min_tasks|2|tasks
INPUT|fargate_scaling_lag_s|30|s
INPUT|compute_peak_to_active_ratio|4|peak/active
INPUT|compute_crossing_search_max_average_rps|10000|time-averaged-events/s
INPUT|partial_batch_checkpoint_enabled|1|boolean
INPUT|ddb_txn_order_kib|1.2|KiB/item
INPUT|ddb_txn_idempotency_kib|0.7|KiB/item
INPUT|ddb_txn_outbox_kib|1.6|KiB/item
INPUT|ddb_txn_sentinel_kib|0.2|KiB/item
INPUT|ddb_order_account_gsi_kib|0.45|KiB/index-entry
INPUT|ddb_order_status_gsi_kib|0.35|KiB/index-entry
INPUT|ddb_outbox_ready_gsi_kib|0.45|KiB/index-entry
INPUT|ddb_order_hot_share|0.30|ratio
INPUT|ddb_idempotency_hot_share|0.20|ratio
INPUT|ddb_outbox_hot_share|0.25|ratio
INPUT|ddb_sentinel_hot_share|0.10|ratio
INPUT|ddb_order_account_gsi_hot_share|0.20|ratio
INPUT|ddb_order_status_gsi_hot_share|0.15|ratio
INPUT|ddb_outbox_ready_gsi_hot_share|0.25|ratio
INPUT|ddb_transaction_multiplier|2|WRU/ordinary-WRU
INPUT|ddb_hot_share|0.30|ratio
INPUT|ddb_lane_target_wru_s|1000|WRU/s
INPUT|ddb_global_table_replicas|0|added-replica-regions
INPUT|ddb_replica_storage_usd_month|0|USD/month-scenario
INPUT|ddb_replica_restore_usd_month|0|USD/month-scenario
INPUT|ddb_replica_topology_other_usd_month|0|USD/month-scenario
INPUT|kinesis_skew|1.25|hottest/average
INPUT|kinesis_top_key_share|0.15|ratio
INPUT|kinesis_util_target|0.80|ratio
INPUT|kinesis_shard_write_rps|1000|records/s/shard
INPUT|kinesis_shard_write_Bps|1000000|B/s/shard
INPUT|kinesis_shard_read_Bps|2000000|B/s/shard
INPUT|kinesis_recovery_commit_rps|9000|committed-records/s
INPUT|kinesis_zero_spare_commit_rps|6000|committed-records/s
INPUT|kinesis_safety_rps|1000|records/s
INPUT|kinesis_backlog_records|4500000|records
INPUT|kinesis_retention_hours|24|hours
INPUT|replay_age_hours|30|hours
INPUT|replay_sensitivity_ratio|0.20|replay-records/original
INPUT|replay_retrieval_consumers|3|consumers
INPUT|replay_consumer_batch_records|100|records/invocation
INPUT|replay_consumer_memory_gb|1|GB/invocation
INPUT|replay_consumer_duration_s|0.08|s/invocation
INPUT|replay_sink_consumers|3|consumers
INPUT|replay_sink_wru_per_record|1|WRU/written-record
INPUT|replay_sink_write_fraction|0.10|written/replayed-record
INPUT|replay_duplicate_rate|0.02|duplicates/attempt
INPUT|replay_idempotency_rru_per_attempt|1|RRU/attempt
INPUT|replay_reconciliation_rate|0.01|reconciliations/attempt
INPUT|replay_sink_capacity_wru_s|2000|WRU/s
INPUT|replay_retained_source_capacity_rps|4000|source-records/s
INPUT|replay_restore_source_capacity_rps|4000|source-records/s
INPUT|replay_consumer_capacity_rps|4000|source-records/s
INPUT|replay_stream_reingest_capacity_rps|5000|source-records/s
INPUT|replay_expired_post_reingest_read_capacity_rps|4000|source-records/s
INPUT|replay_archive_object_bytes|134217728|B/object
INPUT|audit_monthly_ingest_gb|100|GB/month
INPUT|audit_retention_months|24|months
INPUT|audit_year1_months|12|months
INPUT|audit_year2_months|24|months
INPUT|audit_object_lock_usd_year|0|USD/year-scenario
INPUT|audit_requests_usd_year|0|USD/year-scenario
INPUT|audit_transitions_usd_year|0|USD/year-scenario
INPUT|audit_retrieval_usd_year|0|USD/year-scenario
INPUT|audit_kms_usd_year|0|USD/year-scenario
INPUT|audit_export_usd_year|0|USD/year-scenario
INPUT|audit_legal_review_usd_year|0|USD/year-scenario
INPUT|active_accounts|50000|accounts-month
INPUT|ddb_read_item_kib|6|KiB/item
INPUT|cqrs_rru_avoided_per_read|4|RRU/read
INPUT|cqrs_zero_benefit_rru|0|RRU/read
INPUT|cqrs_projection_writes|4|writes/source-write
INPUT|cqrs_transport_requests_per_write|1|requests/source-write
INPUT|cqrs_cache_storage_usd_month|150|USD/month
INPUT|cqrs_rebuild_ratio|0.05|rebuild-writes/source-write
INPUT|cqrs_reconciliation_rate|0.01|reconciliations/source-write
INPUT|cqrs_engineering_hours|6|hours/month
INPUT|cqrs_oncall_hours|2|hours/month
INPUT|cqrs_hourly_usd|150|USD/hour
INPUT|cqrs_fixed_ops_usd|1000|USD/month
INPUT|cqrs_source_p99_ms|120|ms
INPUT|cqrs_projection_p99_ms|25|ms
INPUT|cqrs_freshness_s|2|s
INPUT|allocation_accepted_order|0.20|ratio
INPUT|allocation_execution_fill|0.20|ratio
INPUT|allocation_million_market_updates|0.35|ratio
INPUT|allocation_active_account_month|0.05|ratio
INPUT|allocation_projection_update|0.15|ratio
INPUT|allocation_retained_audit_year|0.05|ratio
INPUT|engineering_usd|12000|USD/month
INPUT|oncall_usd|6000|USD/month
INPUT|compliance_usd|4000|USD/month
INPUT|expected_loss_usd|5000|USD/month
FORMULA|business_counts|orders=avg_orders_rps*month_seconds*duty; accepted=orders*accept_rate; fills=accepted*fills_per_accepted|events/month
FORMULA|batching|invocations=orders/batch*(1+retry); chunks=ceil(batch*payload/billing_chunk); redelivery=batch*(retry+partial); concurrency=ceil(peak/batch*duration*headroom)|mixed
FORMULA|fanout|consumer_work=market_updates*consumers*(1+retry+replay)|records/month
FORMULA|cqrs_break_even|R/W=(projection_variable+fixed_ops/W)/(rru_avoided*rru_price)|reads/write
FORMULA|kinesis_capacity|shards=ceil(max(peak*payload/Bps_limit,peak/rps_limit)*skew/util_target)|shards
FORMULA|kinesis_recovery|drain=backlog/(commit-live-safety); no_safe_drain when denominator<=0|s
FORMULA|dynamodb_amplification|WRU/order=2*sum(ceil(each transaction target KiB))+sum(ceil(each GSI entry KiB))|WRU/order
FORMULA|compute_break_even|events/s=fargate_monthly*batch/(month_seconds*(1+retry)*(request_price+memory*duration*GBs_price))|events/s
FORMULA|unit_economics|unit_cost=allocated_numerator/business_denominator|USD/business-unit
FORMULA|sensitivity|recompute(base;traffic*0.5;traffic*2;fanout*2;burst*10;replay)|scenario
FORMULA|audit_cohorts|exposure=monthly_ingest*sum(cohort_months); retained_years=months/12; unit=annual_storage/retained_years|GB-month,USD/year
FORMULA|compute_capacity|capacity_per_task=batch/service; tasks=max(HA,ceil(peak*headroom/capacity)); active_crossing=average_crossing/duty|events/s,tasks
FORMULA|cqrs_components|threshold=(transport+projection_index+cache+rebuild+reconciliation+engineering+oncall+other_fixed)/avoided_read|reads/write
FORMULA|scenario_economics|recompute all priced components and six marginal/allocated/fully-loaded units under traffic,fanout,replay,retention,replicas|USD
FORMULA|compute_stepwise_capacity|for each average rate derive active=average/duty, peak=active*peak_ratio, tasks=max(HA,ceil(peak*headroom/task_capacity)), then compare Lambda to fleet|state,USD/month
FORMULA|dynamodb_physical_lanes|each base table and GSI lane=peak*lane_share*rounded_lane_WRU; feasibility=max(actual lane)|WRU/s
FORMULA|replica_billing|single Region=base_WRU+GSI_WRU; with n added Regions all n+1 Regions bill base_rWRU+ordinary_GSI_WRU+typed topology scenarios|USD/month
FORMULA|replay_full_path|select retained EFO or expired S3 restore/re-ingest plus selected post-read mode; effective rate=min(source,post-read,consumer,stream,spare,sink); then price retrieval+consumer+sink+idempotency+reconciliation and drain|USD/month,state
DRIVER|eventbridge|scenario_both|batching|cqrs|capacity
DRIVER|sqs_sns|scenario_both|batching|cqrs|capacity
DRIVER|step_functions|scenario_both|batching|cqrs|capacity
DRIVER|api|scenario_both|batching|cqrs|capacity
DRIVER|storage|modeled_both|batching|cqrs|capacity
DRIVER|retention_storage_class|scenario_both|batching|cqrs|capacity
DRIVER|cache_search_analytics|scenario_both|batching|cqrs|capacity
DRIVER|logs|scenario_both|batching|cqrs|capacity
DRIVER|traces|scenario_both|batching|cqrs|capacity
DRIVER|data_transfer|scenario_both|batching|cqrs|capacity
DRIVER|nat|scenario_both|batching|cqrs|capacity
DRIVER|kms|scenario_both|batching|cqrs|capacity
DRIVER|backup_export|scenario_both|batching|cqrs|capacity
DRIVER|retries_dlqs|scenario_both|batching|cqrs|capacity
DRIVER|replay_reconciliation|scenario_both|batching|cqrs|capacity
DRIVER|multi_az_region|scenario_both|batching|cqrs|capacity
DRIVER|support_discounts_tax|excluded_both:risk=invoice_variance|batching|cqrs|capacity
DRIVER|engineering_oncall|modeled_both|batching|cqrs|capacity
DRIVER|expected_correctness_availability_loss|scenario_both|batching|cqrs|capacity
SEMANTIC|chapter_preamble|chapter|PREAMBLE|closed_section|C49,C102,C112,C113|F19,F20|governed_v1|sha256:cba4691ddd0a5f8c505f912abd6e74e8e92ad9a1d0cc0d944abcf1ceb1cb8ee2
SEMANTIC|chapter_optimization|chapter|Optimization sequence|closed_section|C105,C108,C109,C110,C111,C112,C113,C114,C115|F19,F20|governed_v1|sha256:5df27fc8fa9967350996427e01a73d32711e29e84259785a277df899c130ec92
SEMANTIC|chapter_canonical|chapter|Canonical quantitative model|closed_section|C49,C78,C82,C95,C113,C114,C116|A44,A45,A46,A75,A99,A100,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:8f58dbcc483b1919e737cfd56bf9a0c72a2d73da6c2f6f6d1ae8730a7d62e430
SEMANTIC|chapter_units|chapter|Six fintech unit economics|closed_section|C113|A123,A125,A126,F19,F20|governed_v1|sha256:e8806b03a1ee9f755ba30021e667475d67e01833be7d067424f163e0d4a70c11
SEMANTIC|chapter_batching|chapter|Batching and fan-out|closed_section|C73,C76,C113,C114|A96,A98,A99|governed_v1|sha256:7e01449e43e4d6717a1cead2bce8afbfd009355ec470638d6fe5f822da5ee060
SEMANTIC|chapter_cqrs|chapter|CQRS dated break-even|closed_section|C35,C46,C97,C100,C102,C113|A113,F06,F19,F20|governed_v1|sha256:171d71d4deebb924fa714becdd5abdbd6545549dca1d179be33229ab6ce98dc1
SEMANTIC|chapter_capacity|chapter|Kinesis and DynamoDB feasibility|closed_section|C70,C75,C77,C78,C82,C83,C85,C87,C89,C95,C114,C116|A95,A97,A99,A100,A101,A104,A105,A107,A125,A126,A127|governed_v1|sha256:308324dd1d668fac5ac28f2c744e6de0ba14c3c0816b6f326d1a39fc7c4322ff
SEMANTIC|chapter_compute|chapter|Lambda versus sustained compute|closed_section|C53,C111,C115|A51,A58,A59,A67,A123,A124,F09|governed_v1|sha256:e1209232ceaad7d07a40403ccbc3fa93263ae96b8405c87bfa9bbacc1424168b
SEMANTIC|chapter_completeness|chapter|Cost-completeness matrix|closed_section|C113,C114,C115,C116|A99,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:7fe8b6d53e48c78f022b44f8507055150d279a16f3c4ba6536377cbe63bb024f
SEMANTIC|chapter_decisions|chapter|Decision table|closed_section|C113,C114,C115,C116|A99,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:014719b2690da00561b3ed80403caa462c16e4b3de0b94511f0c05867a5db53c
SEMANTIC|chapter_sensitivity|chapter|Sensitivity and falsification|closed_section|C113,C114,C115,C116|A99,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:75da42848f4b0ef5676461becc537c9d5057956bc4aaf57aaa9553b0061833df
SEMANTIC|chapter_questions|chapter|Senior quantitative interview questions|closed_section|C113,C114,C115,C116|A99,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:06f4826de85f0686d232faeaf6e37300c4ea11f6ef88080b35055a02634541aa
SEMANTIC|chapter_sources|chapter|Sources|closed_section|C49,C102,C112,C113,C114,C115,C116|A44,A45,A46,A51,A67,A75,A95,A99,A100,A101,A102,A103,A104,A105,A107,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:ee256848006c6fee0d9a58d8468c12bcfff8a3f0a8c285ab344c2d239db4ea7a
SEMANTIC|cost_task10|cost|Task 10 dated cross-service cost, performance, and capacity model|closed_section|C49,C113,C114,C115,C116|A99,A123,A124,A125,A126,A127,F19,F20|governed_v1|sha256:ac59c724a9788bb76a02762d63496cc5fce4974be506f2b685e2b8a065c0f789
RESULT|monthly_orders|64800000.0|orders/month
RESULT|monthly_accepted_orders|61560000.0|accepted/month
RESULT|monthly_fills|73872000.0|fills/month
RESULT|monthly_market_updates|12960000000.0|records/month
RESULT|monthly_projection_updates|246240000.0|updates/month
RESULT|batch_small_invocations|66096000.0|invocations/month
RESULT|batch_small_chunks|1.0|chunks/invocation
RESULT|batch_small_flush_ms|5.0|ms
RESULT|batch_small_redelivery_records|0.03|record-attempts/original-batch
RESULT|batch_small_expected_extra_attempts|0.03|record-attempts/original-batch
RESULT|batch_small_conditional_max_coupled_records|1.0|records/poison-batch
RESULT|batch_small_concurrency|48.0|concurrent-invocations
RESULT|batch_small_commits|66744000.0|commits/month
RESULT|batch_medium_invocations|6609600.0|invocations/month
RESULT|batch_medium_chunks|1.0|chunks/invocation
RESULT|batch_medium_flush_ms|50.0|ms
RESULT|batch_medium_redelivery_records|0.3|record-attempts/original-batch
RESULT|batch_medium_expected_extra_attempts|0.3|record-attempts/original-batch
RESULT|batch_medium_conditional_max_coupled_records|10.0|records/poison-batch
RESULT|batch_medium_concurrency|5.0|concurrent-invocations
RESULT|batch_medium_commits|6674400.0|commits/month
RESULT|batch_large_invocations|660960.0|invocations/month
RESULT|batch_large_chunks|3.0|chunks/invocation
RESULT|batch_large_flush_ms|500.0|ms
RESULT|batch_large_redelivery_records|3.0|record-attempts/original-batch
RESULT|batch_large_expected_extra_attempts|3.0|record-attempts/original-batch
RESULT|batch_large_conditional_max_coupled_records|100.0|records/poison-batch
RESULT|batch_large_concurrency|1.0|concurrent-invocations
RESULT|batch_large_commits|667440.0|commits/month
RESULT|fanout_consumer_work_records|41601600000.0|consumer-records/month
RESULT|partial_batch_checkpoint_state|ENABLED_LIMITS_SUCCESSFUL_PREFIX_REPLAY|state
RESULT|lambda_monthly_usd|43.908549|USD/month
RESULT|fargate_monthly_usd|71.0928|USD/month
RESULT|fargate_capacity_per_task_rps|125.0|events/s/task
RESULT|fargate_required_tasks|5.0|tasks
RESULT|fargate_minimum_feasible_monthly_usd|177.732|USD/month
RESULT|fargate_baseline_basket_state|PRICE_ONLY_INFEASIBLE|state
RESULT|compute_break_even_events_rps|438.422795|source-records/s
RESULT|compute_break_even_average_rps|438.422795|time-averaged-events/s
RESULT|compute_break_even_active_rps|1753.691181|active-period-events/s
RESULT|compute_break_even_lambda_usd|177.732|USD/month
RESULT|compute_break_even_plugback_usd|177.732|USD/month
RESULT|compute_crossing_state|NO_CAPACITY_FEASIBLE_PRICE_CROSSING|state
RESULT|compute_candidate_average_rps|438.422795|time-averaged-events/s
RESULT|compute_candidate_active_rps|1753.691181|active-period-events/s
RESULT|compute_candidate_peak_rps|7014.764726|peak-events/s
RESULT|compute_candidate_required_tasks|85.0|tasks
RESULT|compute_candidate_fleet_usd|3021.444|USD/month
RESULT|compute_candidate_lambda_usd|177.732|USD/month
RESULT|compute_candidate_price_gap_usd|2843.712|USD/month
RESULT|compute_candidate_queue_events|0.0|events
RESULT|compute_crossing_search_max_average_rps|10000.0|time-averaged-events/s
RESULT|fargate_scaling_lag_queue_events|4500.0|events
RESULT|lambda_warm_tail_margin_ms|20.0|ms
RESULT|lambda_cold_tail_state|TARGET_MISSED|state
RESULT|ddb_wru_per_order|15.0|WRU/order
RESULT|ddb_base_wru_per_order|12.0|WRU/order
RESULT|ddb_gsi_wru_per_order|3.0|WRU/order
RESULT|ddb_replica_wru_per_order|0.0|WRU/order/replicas
RESULT|ddb_replica_base_rwru_per_order|12.0|WRU/order
RESULT|ddb_replica_gsi_wru_per_order|3.0|WRU/order
RESULT|ddb_replica_base_usd_month|559.17216|USD/month
RESULT|ddb_replica_gsi_usd_month|139.79304|USD/month
RESULT|ddb_replica_exclusions_state|ZERO_PLANNING_INPUTS_REPRICE_BEFORE_TOPOLOGY_DECISION|state
RESULT|ddb_topology_state|SINGLE_REGION_ORDINARY_WRU|state
RESULT|ddb_topology_region_count|1.0|Regions
RESULT|ddb_topology_base_usd|559.17216|USD/month
RESULT|ddb_topology_gsi_usd|139.79304|USD/month
RESULT|ddb_unequal_price_single_region_units|15.0|synthetic-cost-units
RESULT|ddb_unequal_price_two_region_units|54.0|synthetic-cost-units
RESULT|ddb_unequal_price_probe_state|OPERATION_SPLIT_PROVEN|state
RESULT|ddb_monthly_usd|1122.141535|USD/month
RESULT|ddb_billing_aggregate_wru_s|1800.0|WRU/s
RESULT|ddb_max_hot_lane_wru_s|480.0|WRU/s
RESULT|ddb_max_hot_lane_id|order|identifier
RESULT|ddb_max_hot_lane_state|FEASIBLE|state
RESULT|ddb_lane_headroom_wru_s|520.0|WRU/s
RESULT|kinesis_planned_shards|13.0|shards
RESULT|kinesis_put_payload_units|13219200000.0|synthetic-cost-units
RESULT|kinesis_monthly_usd|1263.9698|USD/month
RESULT|s3_monthly_usd|59.611731|USD/month
RESULT|kinesis_hot_key_rps|1200.0|source-records/s
RESULT|kinesis_hot_key_state|INFEASIBLE_SINGLE_KEY|state
RESULT|kinesis_standard_required_Bps|10500000.0|B/s
RESULT|kinesis_standard_capacity_Bps|26000000.0|B/s
RESULT|kinesis_standard_read_state|AGGREGATE_FITS_MEASURE_PER_SHARD|state
RESULT|kinesis_replay_spare_rps|3000.0|source-records/s
RESULT|kinesis_drain_seconds|1500.0|s
RESULT|kinesis_zero_drain_state|NO_SAFE_DRAIN_AT_ZERO_SPARE|state
RESULT|kinesis_retention_margin_hours|-6.0|hours
RESULT|kinesis_replay_retention_state|REPLAY_EXPIRED_RESTORE_REQUIRED|state
RESULT|audit_year1_storage_gb_month|7800.0|GB-month/cumulative-cohort-period
RESULT|audit_year1_storage_usd|179.4|USD/cumulative-cohort-period
RESULT|audit_year1_retained_years|1.0|retained-years
RESULT|audit_two_year_storage_gb_month|30000.0|GB-month/cumulative-cohort-period
RESULT|audit_two_year_storage_usd|690.0|USD/cumulative-cohort-period
RESULT|audit_two_year_retained_years|2.0|retained-years
RESULT|audit_steady_storage_gb_month|28800.0|GB-month/year
RESULT|audit_steady_storage_usd|662.4|USD/year
RESULT|audit_steady_retained_years|2.0|retained-years
RESULT|audit_year1_cost_per_retained_year_usd|179.4|USD/retained-audit-year
RESULT|audit_two_year_cost_per_retained_year_usd|345.0|USD/retained-audit-year
RESULT|audit_steady_cost_per_retained_year_usd|331.2|USD/retained-audit-year
RESULT|audit_object_lock_usd_year|0.0|USD/year-scenario
RESULT|audit_requests_usd_year|0.0|USD/year-scenario
RESULT|audit_transitions_usd_year|0.0|USD/year-scenario
RESULT|audit_retrieval_usd_year|0.0|USD/year-scenario
RESULT|audit_kms_usd_year|0.0|USD/year-scenario
RESULT|audit_export_usd_year|0.0|USD/year-scenario
RESULT|audit_legal_review_usd_year|0.0|USD/year-scenario
RESULT|audit_adjacent_scenario_total_usd_year|0.0|USD/year-scenario
RESULT|audit_adjacent_scenarios_state|ZERO_PLANNING_INPUTS_REPRICE_BEFORE_DECISION|state
RESULT|cqrs_transport_usd_month|94.392164|USD/month
RESULT|cqrs_projection_index_usd_month|173.5992|USD/month
RESULT|cqrs_cache_storage_usd_month|150.0|USD/month
RESULT|cqrs_rebuild_replay_usd_month|8.67996|USD/month
RESULT|cqrs_reconciliation_usd_month|2.679914|USD/month
RESULT|cqrs_engineering_usd_month|900.0|USD/month
RESULT|cqrs_oncall_usd_month|300.0|USD/month
RESULT|cqrs_break_even_reads_per_write|75.462912|reads/write
RESULT|cqrs_read_heavy_net_usd|-887.203238|USD/month
RESULT|cqrs_mixed_net_usd|-2350.607558|USD/month
RESULT|cqrs_write_heavy_net_usd|-2559.665318|USD/month
RESULT|cqrs_zero_benefit_state|NO_ECONOMIC_WIN_ZERO_BENEFIT|state
RESULT|cqrs_half_volume_break_even|142.908388|reads/write
RESULT|cqrs_double_volume_break_even|41.740175|reads/write
RESULT|cqrs_half_benefit_break_even|150.925825|reads/write
RESULT|cqrs_double_fanout_break_even|80.744184|reads/write
RESULT|cqrs_measured_p99_gain_ms|95.0|ms
RESULT|cqrs_measured_freshness_s|2.0|s
RESULT|ddb_eventual_rru|1.0|RRU/read
RESULT|ddb_strong_rru|2.0|RRU/read
RESULT|ddb_transactional_rru|4.0|RRU/read
RESULT|marginal_platform_usd|2489.631616|USD/month
RESULT|allocated_platform_usd|24489.631616|USD/month
RESULT|fully_loaded_risk_adjusted_usd|29489.631616|USD/month
RESULT|allocation_share_sum|1.0|ratio
RESULT|lambda_contribution_percent|1.763656|percent
RESULT|ddb_contribution_percent|45.072593|percent
RESULT|kinesis_contribution_percent|50.76935|percent
RESULT|s3_contribution_percent|2.3944|percent
RESULT|half_traffic_shards|7.0|shards
RESULT|double_traffic_shards|25.0|shards
RESULT|double_fanout_work_records|83203200000.0|consumer-records/month
RESULT|tenfold_burst_lambda_concurrency|48.0|concurrent-invocations
RESULT|tenfold_burst_queue_records|4300800.0|records
RESULT|replay_load_records|2592000000.0|records/month
RESULT|ddb_lane_order_wru_per_order|4.0|WRU/order
RESULT|ddb_lane_order_hot_wru_s|480.0|WRU/s
RESULT|ddb_lane_order_state|FEASIBLE|state
RESULT|ddb_lane_idempotency_wru_per_order|2.0|WRU/order
RESULT|ddb_lane_idempotency_hot_wru_s|160.0|WRU/s
RESULT|ddb_lane_idempotency_state|FEASIBLE|state
RESULT|ddb_lane_outbox_wru_per_order|4.0|WRU/order
RESULT|ddb_lane_outbox_hot_wru_s|400.0|WRU/s
RESULT|ddb_lane_outbox_state|FEASIBLE|state
RESULT|ddb_lane_sentinel_wru_per_order|2.0|WRU/order
RESULT|ddb_lane_sentinel_hot_wru_s|80.0|WRU/s
RESULT|ddb_lane_sentinel_state|FEASIBLE|state
RESULT|ddb_lane_order_account_gsi_wru_per_order|1.0|WRU/order
RESULT|ddb_lane_order_account_gsi_hot_wru_s|80.0|WRU/s
RESULT|ddb_lane_order_account_gsi_state|FEASIBLE|state
RESULT|ddb_lane_order_status_gsi_wru_per_order|1.0|WRU/order
RESULT|ddb_lane_order_status_gsi_hot_wru_s|60.0|WRU/s
RESULT|ddb_lane_order_status_gsi_state|FEASIBLE|state
RESULT|ddb_lane_outbox_ready_gsi_wru_per_order|1.0|WRU/order
RESULT|ddb_lane_outbox_ready_gsi_hot_wru_s|100.0|WRU/s
RESULT|ddb_lane_outbox_ready_gsi_state|FEASIBLE|state
RESULT|replay_efo_retrieval_gb|1267.34376|GB/month
RESULT|replay_efo_retrieval_usd|18.629953|USD/month
RESULT|replay_source_state|EXPIRED_S3_RESTORE_REINGEST|state
RESULT|replay_source_available_rps|4000.0|source-records/s
RESULT|replay_effective_rate_rps|3000.0|source-records/s
RESULT|replay_rate_bottleneck|KINESIS_SPARE|state
RESULT|replay_sink_capacity_source_rps|6535.947712|source-records/s
RESULT|replay_archive_objects|3380.0|objects/month
RESULT|replay_s3_source_gb|422.44792|GB/month
RESULT|replay_s3_restore_request_usd|0.1859|USD/month
RESULT|replay_s3_get_request_usd|0.001352|USD/month
RESULT|replay_s3_retrieval_usd|4.224479|USD/month
RESULT|replay_reingest_put_units|648000000.0|payload-units/month
RESULT|replay_reingest_put_usd|10.692|USD/month
RESULT|replay_post_reingest_read_mode|EFO|state
RESULT|replay_post_reingest_read_capacity_rps|4000.0|source-records/s
RESULT|replay_post_reingest_read_gb|1267.34376|GB/month
RESULT|replay_post_reingest_read_usd|18.629953|USD/month
RESULT|replay_post_reingest_read_capacity_state|CAPACITY_AVAILABLE|state
RESULT|replay_consumer_invocations|19440000.0|invocations/month
RESULT|replay_consumer_compute_usd|29.808052|USD/month
RESULT|replay_sink_attempts|1982880000.0|attempts/month
RESULT|replay_sink_projection_wru|198288000.0|WRU/month
RESULT|replay_sink_projection_usd|139.79304|USD/month
RESULT|replay_idempotency_rru|1982880000.0|RRU/month
RESULT|replay_idempotency_usd|280.57752|USD/month
RESULT|replay_reconciliation_attempts|19828800.0|attempts/month
RESULT|replay_reconciliation_usd|6.771535|USD/month
RESULT|replay_sink_demand_wru_s|918.0|WRU/s
RESULT|replay_sink_capacity_headroom_wru_s|1082.0|WRU/s
RESULT|replay_sink_capacity_state|CAPACITY_FEASIBLE|state
RESULT|replay_drain_seconds|216000.0|s
RESULT|replay_retained_probe_source_state|RETAINED_KINESIS_EFO|state
RESULT|replay_retained_probe_effective_rate_rps|3000.0|source-records/s
RESULT|replay_retained_probe_rate_bottleneck|KINESIS_SPARE|state
RESULT|replay_retained_probe_drain_seconds|216000.0|s
RESULT|replay_retained_probe_efo_usd|18.629953|USD/month
RESULT|replay_retained_probe_s3_usd|0.0|USD/month
RESULT|replay_retained_probe_reingest_usd|0.0|USD/month
RESULT|replay_expired_probe_source_state|EXPIRED_S3_RESTORE_REINGEST|state
RESULT|replay_expired_probe_efo_usd|18.629953|USD/month
RESULT|replay_expired_probe_s3_usd|4.411731|USD/month
RESULT|replay_expired_probe_reingest_usd|10.692|USD/month
RESULT|replay_sink_limited_500_rate_rps|1633.986928|source-records/s
RESULT|replay_sink_limited_500_drain_seconds|396576.0|s
RESULT|replay_sink_limited_500_demand_wru_s|500.0|WRU/s
RESULT|replay_sink_limited_500_state|SINK|state
RESULT|replay_consumer_limited_rate_rps|1000.0|source-records/s
RESULT|replay_consumer_limited_drain_seconds|648000.0|s
RESULT|replay_consumer_limited_state|CONSUMER|state
RESULT|replay_zero_spare_rate_rps|0.0|source-records/s
RESULT|replay_zero_spare_drain_state|NO_SAFE_DRAIN|state
RESULT|replay_zero_spare_drain_seconds|INFINITE|s
RESULT|accepted_order_marginal_numerator_usd|497.926323|USD/numerator-period
RESULT|accepted_order_marginal_usd|0.000008|USD/business-unit
RESULT|accepted_order_allocated_numerator_usd|4897.926323|USD/numerator-period
RESULT|accepted_order_allocated_usd|0.00008|USD/business-unit
RESULT|accepted_order_fully_loaded_numerator_usd|5897.926323|USD/numerator-period
RESULT|accepted_order_fully_loaded_usd|0.000096|USD/business-unit
RESULT|accepted_order_denominator|61560000.0|business-units
RESULT|execution_fill_marginal_numerator_usd|497.926323|USD/numerator-period
RESULT|execution_fill_marginal_usd|0.000007|USD/business-unit
RESULT|execution_fill_allocated_numerator_usd|4897.926323|USD/numerator-period
RESULT|execution_fill_allocated_usd|0.000066|USD/business-unit
RESULT|execution_fill_fully_loaded_numerator_usd|5897.926323|USD/numerator-period
RESULT|execution_fill_fully_loaded_usd|0.00008|USD/business-unit
RESULT|execution_fill_denominator|73872000.0|business-units
RESULT|million_market_updates_marginal_numerator_usd|871.371066|USD/numerator-period
RESULT|million_market_updates_marginal_usd|0.067235|USD/business-unit
RESULT|million_market_updates_allocated_numerator_usd|8571.371066|USD/numerator-period
RESULT|million_market_updates_allocated_usd|0.661371|USD/business-unit
RESULT|million_market_updates_fully_loaded_numerator_usd|10321.371066|USD/numerator-period
RESULT|million_market_updates_fully_loaded_usd|0.796402|USD/business-unit
RESULT|million_market_updates_denominator|12960.0|business-units
RESULT|active_account_month_marginal_numerator_usd|124.481581|USD/numerator-period
RESULT|active_account_month_marginal_usd|0.00249|USD/business-unit
RESULT|active_account_month_allocated_numerator_usd|1224.481581|USD/numerator-period
RESULT|active_account_month_allocated_usd|0.02449|USD/business-unit
RESULT|active_account_month_fully_loaded_numerator_usd|1474.481581|USD/numerator-period
RESULT|active_account_month_fully_loaded_usd|0.02949|USD/business-unit
RESULT|active_account_month_denominator|50000.0|business-units
RESULT|projection_update_marginal_numerator_usd|373.444742|USD/numerator-period
RESULT|projection_update_marginal_usd|0.000002|USD/business-unit
RESULT|projection_update_allocated_numerator_usd|3673.444742|USD/numerator-period
RESULT|projection_update_allocated_usd|0.000015|USD/business-unit
RESULT|projection_update_fully_loaded_numerator_usd|4423.444742|USD/numerator-period
RESULT|projection_update_fully_loaded_usd|0.000018|USD/business-unit
RESULT|projection_update_denominator|246240000.0|business-units
RESULT|retained_audit_year_marginal_numerator_usd|1493.778969|USD/numerator-period
RESULT|retained_audit_year_marginal_usd|746.889485|USD/business-unit
RESULT|retained_audit_year_allocated_numerator_usd|14693.778969|USD/numerator-period
RESULT|retained_audit_year_allocated_usd|7346.889485|USD/business-unit
RESULT|retained_audit_year_fully_loaded_numerator_usd|17693.778969|USD/numerator-period
RESULT|retained_audit_year_fully_loaded_usd|8846.889485|USD/business-unit
RESULT|retained_audit_year_denominator|2.0|business-units
RESULT|scenario_half_marginal_usd|1269.295808|USD/month
RESULT|scenario_half_accepted_order_marginal_usd|0.000008|USD/business-unit
RESULT|scenario_half_accepted_order_allocated_usd|0.000151|USD/business-unit
RESULT|scenario_half_accepted_order_fully_loaded_usd|0.000184|USD/business-unit
RESULT|scenario_half_execution_fill_marginal_usd|0.000007|USD/business-unit
RESULT|scenario_half_execution_fill_allocated_usd|0.000126|USD/business-unit
RESULT|scenario_half_execution_fill_fully_loaded_usd|0.000153|USD/business-unit
RESULT|scenario_half_million_market_updates_marginal_usd|0.068558|USD/business-unit
RESULT|scenario_half_million_market_updates_allocated_usd|1.256829|USD/business-unit
RESULT|scenario_half_million_market_updates_fully_loaded_usd|1.526891|USD/business-unit
RESULT|scenario_half_active_account_month_marginal_usd|0.002539|USD/business-unit
RESULT|scenario_half_active_account_month_allocated_usd|0.046539|USD/business-unit
RESULT|scenario_half_active_account_month_fully_loaded_usd|0.056539|USD/business-unit
RESULT|scenario_half_projection_update_marginal_usd|0.000002|USD/business-unit
RESULT|scenario_half_projection_update_allocated_usd|0.000028|USD/business-unit
RESULT|scenario_half_projection_update_fully_loaded_usd|0.000034|USD/business-unit
RESULT|scenario_half_retained_audit_year_marginal_usd|380.788742|USD/business-unit
RESULT|scenario_half_retained_audit_year_allocated_usd|6980.788742|USD/business-unit
RESULT|scenario_half_retained_audit_year_fully_loaded_usd|8480.788742|USD/business-unit
RESULT|scenario_double_marginal_usd|4930.303231|USD/month
RESULT|scenario_double_accepted_order_marginal_usd|0.000008|USD/business-unit
RESULT|scenario_double_accepted_order_allocated_usd|0.000044|USD/business-unit
RESULT|scenario_double_accepted_order_fully_loaded_usd|0.000052|USD/business-unit
RESULT|scenario_double_execution_fill_marginal_usd|0.000007|USD/business-unit
RESULT|scenario_double_execution_fill_allocated_usd|0.000036|USD/business-unit
RESULT|scenario_double_execution_fill_fully_loaded_usd|0.000043|USD/business-unit
RESULT|scenario_double_million_market_updates_marginal_usd|0.066574|USD/business-unit
RESULT|scenario_double_million_market_updates_allocated_usd|0.363642|USD/business-unit
RESULT|scenario_double_million_market_updates_fully_loaded_usd|0.431158|USD/business-unit
RESULT|scenario_double_active_account_month_marginal_usd|0.002465|USD/business-unit
RESULT|scenario_double_active_account_month_allocated_usd|0.013465|USD/business-unit
RESULT|scenario_double_active_account_month_fully_loaded_usd|0.015965|USD/business-unit
RESULT|scenario_double_projection_update_marginal_usd|0.000002|USD/business-unit
RESULT|scenario_double_projection_update_allocated_usd|0.000008|USD/business-unit
RESULT|scenario_double_projection_update_fully_loaded_usd|0.00001|USD/business-unit
RESULT|scenario_double_retained_audit_year_marginal_usd|1479.090969|USD/business-unit
RESULT|scenario_double_retained_audit_year_allocated_usd|8079.090969|USD/business-unit
RESULT|scenario_double_retained_audit_year_fully_loaded_usd|9579.090969|USD/business-unit
RESULT|scenario_double_fanout_marginal_usd|3347.042662|USD/month
RESULT|scenario_double_fanout_accepted_order_marginal_usd|0.000011|USD/business-unit
RESULT|scenario_double_fanout_accepted_order_allocated_usd|0.000082|USD/business-unit
RESULT|scenario_double_fanout_accepted_order_fully_loaded_usd|0.000099|USD/business-unit
RESULT|scenario_double_fanout_execution_fill_marginal_usd|0.000009|USD/business-unit
RESULT|scenario_double_fanout_execution_fill_allocated_usd|0.000069|USD/business-unit
RESULT|scenario_double_fanout_execution_fill_fully_loaded_usd|0.000082|USD/business-unit
RESULT|scenario_double_fanout_million_market_updates_marginal_usd|0.090391|USD/business-unit
RESULT|scenario_double_fanout_million_market_updates_allocated_usd|0.684527|USD/business-unit
RESULT|scenario_double_fanout_million_market_updates_fully_loaded_usd|0.819557|USD/business-unit
RESULT|scenario_double_fanout_active_account_month_marginal_usd|0.003347|USD/business-unit
RESULT|scenario_double_fanout_active_account_month_allocated_usd|0.025347|USD/business-unit
RESULT|scenario_double_fanout_active_account_month_fully_loaded_usd|0.030347|USD/business-unit
RESULT|scenario_double_fanout_projection_update_marginal_usd|0.000002|USD/business-unit
RESULT|scenario_double_fanout_projection_update_allocated_usd|0.000015|USD/business-unit
RESULT|scenario_double_fanout_projection_update_fully_loaded_usd|0.000018|USD/business-unit
RESULT|scenario_double_fanout_retained_audit_year_marginal_usd|1004.112799|USD/business-unit
RESULT|scenario_double_fanout_retained_audit_year_allocated_usd|7604.112799|USD/business-unit
RESULT|scenario_double_fanout_retained_audit_year_fully_loaded_usd|9104.112799|USD/business-unit
RESULT|scenario_replay_marginal_usd|3961.683055|USD/month
RESULT|scenario_replay_accepted_order_marginal_usd|0.000013|USD/business-unit
RESULT|scenario_replay_accepted_order_allocated_usd|0.000084|USD/business-unit
RESULT|scenario_replay_accepted_order_fully_loaded_usd|0.000101|USD/business-unit
RESULT|scenario_replay_execution_fill_marginal_usd|0.000011|USD/business-unit
RESULT|scenario_replay_execution_fill_allocated_usd|0.00007|USD/business-unit
RESULT|scenario_replay_execution_fill_fully_loaded_usd|0.000084|USD/business-unit
RESULT|scenario_replay_million_market_updates_marginal_usd|0.10699|USD/business-unit
RESULT|scenario_replay_million_market_updates_allocated_usd|0.701126|USD/business-unit
RESULT|scenario_replay_million_market_updates_fully_loaded_usd|0.836157|USD/business-unit
RESULT|scenario_replay_active_account_month_marginal_usd|0.003962|USD/business-unit
RESULT|scenario_replay_active_account_month_allocated_usd|0.025962|USD/business-unit
RESULT|scenario_replay_active_account_month_fully_loaded_usd|0.030962|USD/business-unit
RESULT|scenario_replay_projection_update_marginal_usd|0.000002|USD/business-unit
RESULT|scenario_replay_projection_update_allocated_usd|0.000016|USD/business-unit
RESULT|scenario_replay_projection_update_fully_loaded_usd|0.000019|USD/business-unit
RESULT|scenario_replay_retained_audit_year_marginal_usd|1188.504916|USD/business-unit
RESULT|scenario_replay_retained_audit_year_allocated_usd|7788.504916|USD/business-unit
RESULT|scenario_replay_retained_audit_year_fully_loaded_usd|9288.504916|USD/business-unit
RESULT|scenario_replay_kinesis_usd|1351.93566|USD/month
RESULT|scenario_replay_efo_retrieval_usd|74.519813|USD/month
RESULT|scenario_replay_consumer_compute_usd|119.232207|USD/month
RESULT|scenario_replay_sink_projection_usd|559.17216|USD/month
RESULT|scenario_replay_idempotency_usd|1122.31008|USD/month
RESULT|scenario_replay_reconciliation_usd|27.086141|USD/month
RESULT|scenario_one_replica_marginal_usd|3188.596816|USD/month
RESULT|scenario_one_replica_accepted_order_marginal_usd|0.00001|USD/business-unit
RESULT|scenario_one_replica_accepted_order_allocated_usd|0.000082|USD/business-unit
RESULT|scenario_one_replica_accepted_order_fully_loaded_usd|0.000098|USD/business-unit
RESULT|scenario_one_replica_execution_fill_marginal_usd|0.000009|USD/business-unit
RESULT|scenario_one_replica_execution_fill_allocated_usd|0.000068|USD/business-unit
RESULT|scenario_one_replica_execution_fill_fully_loaded_usd|0.000082|USD/business-unit
RESULT|scenario_one_replica_million_market_updates_marginal_usd|0.086112|USD/business-unit
RESULT|scenario_one_replica_million_market_updates_allocated_usd|0.680248|USD/business-unit
RESULT|scenario_one_replica_million_market_updates_fully_loaded_usd|0.815278|USD/business-unit
RESULT|scenario_one_replica_active_account_month_marginal_usd|0.003189|USD/business-unit
RESULT|scenario_one_replica_active_account_month_allocated_usd|0.025189|USD/business-unit
RESULT|scenario_one_replica_active_account_month_fully_loaded_usd|0.030189|USD/business-unit
RESULT|scenario_one_replica_projection_update_marginal_usd|0.000002|USD/business-unit
RESULT|scenario_one_replica_projection_update_allocated_usd|0.000015|USD/business-unit
RESULT|scenario_one_replica_projection_update_fully_loaded_usd|0.000018|USD/business-unit
RESULT|scenario_one_replica_retained_audit_year_marginal_usd|956.579045|USD/business-unit
RESULT|scenario_one_replica_retained_audit_year_allocated_usd|7556.579045|USD/business-unit
RESULT|scenario_one_replica_retained_audit_year_fully_loaded_usd|9056.579045|USD/business-unit
RESULT|scenario_one_replica_topology_state|GLOBAL_TABLE_ALL_REGIONS_BASE_RWRU_GSI_WRU|state
RESULT|scenario_one_replica_region_count|2.0|Regions
RESULT|scenario_one_replica_base_rwru_usd|1118.34432|USD/month
RESULT|scenario_one_replica_gsi_wru_usd|279.58608|USD/month
<!-- TASK10_CANONICAL_END -->
<!-- TASK10_RENDER_BEGIN -->
| Result ID | Value | Unit |
|---|---:|---|
| monthly_orders | 64800000.0 | orders/month |
| monthly_accepted_orders | 61560000.0 | accepted/month |
| monthly_fills | 73872000.0 | fills/month |
| monthly_market_updates | 12960000000.0 | records/month |
| monthly_projection_updates | 246240000.0 | updates/month |
| batch_small_invocations | 66096000.0 | invocations/month |
| batch_small_chunks | 1.0 | chunks/invocation |
| batch_small_flush_ms | 5.0 | ms |
| batch_small_redelivery_records | 0.03 | record-attempts/original-batch |
| batch_small_expected_extra_attempts | 0.03 | record-attempts/original-batch |
| batch_small_conditional_max_coupled_records | 1.0 | records/poison-batch |
| batch_small_concurrency | 48.0 | concurrent-invocations |
| batch_small_commits | 66744000.0 | commits/month |
| batch_medium_invocations | 6609600.0 | invocations/month |
| batch_medium_chunks | 1.0 | chunks/invocation |
| batch_medium_flush_ms | 50.0 | ms |
| batch_medium_redelivery_records | 0.3 | record-attempts/original-batch |
| batch_medium_expected_extra_attempts | 0.3 | record-attempts/original-batch |
| batch_medium_conditional_max_coupled_records | 10.0 | records/poison-batch |
| batch_medium_concurrency | 5.0 | concurrent-invocations |
| batch_medium_commits | 6674400.0 | commits/month |
| batch_large_invocations | 660960.0 | invocations/month |
| batch_large_chunks | 3.0 | chunks/invocation |
| batch_large_flush_ms | 500.0 | ms |
| batch_large_redelivery_records | 3.0 | record-attempts/original-batch |
| batch_large_expected_extra_attempts | 3.0 | record-attempts/original-batch |
| batch_large_conditional_max_coupled_records | 100.0 | records/poison-batch |
| batch_large_concurrency | 1.0 | concurrent-invocations |
| batch_large_commits | 667440.0 | commits/month |
| fanout_consumer_work_records | 41601600000.0 | consumer-records/month |
| partial_batch_checkpoint_state | ENABLED_LIMITS_SUCCESSFUL_PREFIX_REPLAY | state |
| lambda_monthly_usd | 43.908549 | USD/month |
| fargate_monthly_usd | 71.0928 | USD/month |
| fargate_capacity_per_task_rps | 125.0 | events/s/task |
| fargate_required_tasks | 5.0 | tasks |
| fargate_minimum_feasible_monthly_usd | 177.732 | USD/month |
| fargate_baseline_basket_state | PRICE_ONLY_INFEASIBLE | state |
| compute_break_even_events_rps | 438.422795 | source-records/s |
| compute_break_even_average_rps | 438.422795 | time-averaged-events/s |
| compute_break_even_active_rps | 1753.691181 | active-period-events/s |
| compute_break_even_lambda_usd | 177.732 | USD/month |
| compute_break_even_plugback_usd | 177.732 | USD/month |
| compute_crossing_state | NO_CAPACITY_FEASIBLE_PRICE_CROSSING | state |
| compute_candidate_average_rps | 438.422795 | time-averaged-events/s |
| compute_candidate_active_rps | 1753.691181 | active-period-events/s |
| compute_candidate_peak_rps | 7014.764726 | peak-events/s |
| compute_candidate_required_tasks | 85.0 | tasks |
| compute_candidate_fleet_usd | 3021.444 | USD/month |
| compute_candidate_lambda_usd | 177.732 | USD/month |
| compute_candidate_price_gap_usd | 2843.712 | USD/month |
| compute_candidate_queue_events | 0.0 | events |
| compute_crossing_search_max_average_rps | 10000.0 | time-averaged-events/s |
| fargate_scaling_lag_queue_events | 4500.0 | events |
| lambda_warm_tail_margin_ms | 20.0 | ms |
| lambda_cold_tail_state | TARGET_MISSED | state |
| ddb_wru_per_order | 15.0 | WRU/order |
| ddb_base_wru_per_order | 12.0 | WRU/order |
| ddb_gsi_wru_per_order | 3.0 | WRU/order |
| ddb_replica_wru_per_order | 0.0 | WRU/order/replicas |
| ddb_replica_base_rwru_per_order | 12.0 | WRU/order |
| ddb_replica_gsi_wru_per_order | 3.0 | WRU/order |
| ddb_replica_base_usd_month | 559.17216 | USD/month |
| ddb_replica_gsi_usd_month | 139.79304 | USD/month |
| ddb_replica_exclusions_state | ZERO_PLANNING_INPUTS_REPRICE_BEFORE_TOPOLOGY_DECISION | state |
| ddb_topology_state | SINGLE_REGION_ORDINARY_WRU | state |
| ddb_topology_region_count | 1.0 | Regions |
| ddb_topology_base_usd | 559.17216 | USD/month |
| ddb_topology_gsi_usd | 139.79304 | USD/month |
| ddb_unequal_price_single_region_units | 15.0 | synthetic-cost-units |
| ddb_unequal_price_two_region_units | 54.0 | synthetic-cost-units |
| ddb_unequal_price_probe_state | OPERATION_SPLIT_PROVEN | state |
| ddb_monthly_usd | 1122.141535 | USD/month |
| ddb_billing_aggregate_wru_s | 1800.0 | WRU/s |
| ddb_max_hot_lane_wru_s | 480.0 | WRU/s |
| ddb_max_hot_lane_id | order | identifier |
| ddb_max_hot_lane_state | FEASIBLE | state |
| ddb_lane_headroom_wru_s | 520.0 | WRU/s |
| kinesis_planned_shards | 13.0 | shards |
| kinesis_put_payload_units | 13219200000.0 | synthetic-cost-units |
| kinesis_monthly_usd | 1263.9698 | USD/month |
| s3_monthly_usd | 59.611731 | USD/month |
| kinesis_hot_key_rps | 1200.0 | source-records/s |
| kinesis_hot_key_state | INFEASIBLE_SINGLE_KEY | state |
| kinesis_standard_required_Bps | 10500000.0 | B/s |
| kinesis_standard_capacity_Bps | 26000000.0 | B/s |
| kinesis_standard_read_state | AGGREGATE_FITS_MEASURE_PER_SHARD | state |
| kinesis_replay_spare_rps | 3000.0 | source-records/s |
| kinesis_drain_seconds | 1500.0 | s |
| kinesis_zero_drain_state | NO_SAFE_DRAIN_AT_ZERO_SPARE | state |
| kinesis_retention_margin_hours | -6.0 | hours |
| kinesis_replay_retention_state | REPLAY_EXPIRED_RESTORE_REQUIRED | state |
| audit_year1_storage_gb_month | 7800.0 | GB-month/cumulative-cohort-period |
| audit_year1_storage_usd | 179.4 | USD/cumulative-cohort-period |
| audit_year1_retained_years | 1.0 | retained-years |
| audit_two_year_storage_gb_month | 30000.0 | GB-month/cumulative-cohort-period |
| audit_two_year_storage_usd | 690.0 | USD/cumulative-cohort-period |
| audit_two_year_retained_years | 2.0 | retained-years |
| audit_steady_storage_gb_month | 28800.0 | GB-month/year |
| audit_steady_storage_usd | 662.4 | USD/year |
| audit_steady_retained_years | 2.0 | retained-years |
| audit_year1_cost_per_retained_year_usd | 179.4 | USD/retained-audit-year |
| audit_two_year_cost_per_retained_year_usd | 345.0 | USD/retained-audit-year |
| audit_steady_cost_per_retained_year_usd | 331.2 | USD/retained-audit-year |
| audit_object_lock_usd_year | 0.0 | USD/year-scenario |
| audit_requests_usd_year | 0.0 | USD/year-scenario |
| audit_transitions_usd_year | 0.0 | USD/year-scenario |
| audit_retrieval_usd_year | 0.0 | USD/year-scenario |
| audit_kms_usd_year | 0.0 | USD/year-scenario |
| audit_export_usd_year | 0.0 | USD/year-scenario |
| audit_legal_review_usd_year | 0.0 | USD/year-scenario |
| audit_adjacent_scenario_total_usd_year | 0.0 | USD/year-scenario |
| audit_adjacent_scenarios_state | ZERO_PLANNING_INPUTS_REPRICE_BEFORE_DECISION | state |
| cqrs_transport_usd_month | 94.392164 | USD/month |
| cqrs_projection_index_usd_month | 173.5992 | USD/month |
| cqrs_cache_storage_usd_month | 150.0 | USD/month |
| cqrs_rebuild_replay_usd_month | 8.67996 | USD/month |
| cqrs_reconciliation_usd_month | 2.679914 | USD/month |
| cqrs_engineering_usd_month | 900.0 | USD/month |
| cqrs_oncall_usd_month | 300.0 | USD/month |
| cqrs_break_even_reads_per_write | 75.462912 | reads/write |
| cqrs_read_heavy_net_usd | -887.203238 | USD/month |
| cqrs_mixed_net_usd | -2350.607558 | USD/month |
| cqrs_write_heavy_net_usd | -2559.665318 | USD/month |
| cqrs_zero_benefit_state | NO_ECONOMIC_WIN_ZERO_BENEFIT | state |
| cqrs_half_volume_break_even | 142.908388 | reads/write |
| cqrs_double_volume_break_even | 41.740175 | reads/write |
| cqrs_half_benefit_break_even | 150.925825 | reads/write |
| cqrs_double_fanout_break_even | 80.744184 | reads/write |
| cqrs_measured_p99_gain_ms | 95.0 | ms |
| cqrs_measured_freshness_s | 2.0 | s |
| ddb_eventual_rru | 1.0 | RRU/read |
| ddb_strong_rru | 2.0 | RRU/read |
| ddb_transactional_rru | 4.0 | RRU/read |
| marginal_platform_usd | 2489.631616 | USD/month |
| allocated_platform_usd | 24489.631616 | USD/month |
| fully_loaded_risk_adjusted_usd | 29489.631616 | USD/month |
| allocation_share_sum | 1.0 | ratio |
| lambda_contribution_percent | 1.763656 | percent |
| ddb_contribution_percent | 45.072593 | percent |
| kinesis_contribution_percent | 50.76935 | percent |
| s3_contribution_percent | 2.3944 | percent |
| half_traffic_shards | 7.0 | shards |
| double_traffic_shards | 25.0 | shards |
| double_fanout_work_records | 83203200000.0 | consumer-records/month |
| tenfold_burst_lambda_concurrency | 48.0 | concurrent-invocations |
| tenfold_burst_queue_records | 4300800.0 | records |
| replay_load_records | 2592000000.0 | records/month |
| ddb_lane_order_wru_per_order | 4.0 | WRU/order |
| ddb_lane_order_hot_wru_s | 480.0 | WRU/s |
| ddb_lane_order_state | FEASIBLE | state |
| ddb_lane_idempotency_wru_per_order | 2.0 | WRU/order |
| ddb_lane_idempotency_hot_wru_s | 160.0 | WRU/s |
| ddb_lane_idempotency_state | FEASIBLE | state |
| ddb_lane_outbox_wru_per_order | 4.0 | WRU/order |
| ddb_lane_outbox_hot_wru_s | 400.0 | WRU/s |
| ddb_lane_outbox_state | FEASIBLE | state |
| ddb_lane_sentinel_wru_per_order | 2.0 | WRU/order |
| ddb_lane_sentinel_hot_wru_s | 80.0 | WRU/s |
| ddb_lane_sentinel_state | FEASIBLE | state |
| ddb_lane_order_account_gsi_wru_per_order | 1.0 | WRU/order |
| ddb_lane_order_account_gsi_hot_wru_s | 80.0 | WRU/s |
| ddb_lane_order_account_gsi_state | FEASIBLE | state |
| ddb_lane_order_status_gsi_wru_per_order | 1.0 | WRU/order |
| ddb_lane_order_status_gsi_hot_wru_s | 60.0 | WRU/s |
| ddb_lane_order_status_gsi_state | FEASIBLE | state |
| ddb_lane_outbox_ready_gsi_wru_per_order | 1.0 | WRU/order |
| ddb_lane_outbox_ready_gsi_hot_wru_s | 100.0 | WRU/s |
| ddb_lane_outbox_ready_gsi_state | FEASIBLE | state |
| replay_efo_retrieval_gb | 1267.34376 | GB/month |
| replay_efo_retrieval_usd | 18.629953 | USD/month |
| replay_source_state | EXPIRED_S3_RESTORE_REINGEST | state |
| replay_source_available_rps | 4000.0 | source-records/s |
| replay_effective_rate_rps | 3000.0 | source-records/s |
| replay_rate_bottleneck | KINESIS_SPARE | state |
| replay_sink_capacity_source_rps | 6535.947712 | source-records/s |
| replay_archive_objects | 3380.0 | objects/month |
| replay_s3_source_gb | 422.44792 | GB/month |
| replay_s3_restore_request_usd | 0.1859 | USD/month |
| replay_s3_get_request_usd | 0.001352 | USD/month |
| replay_s3_retrieval_usd | 4.224479 | USD/month |
| replay_reingest_put_units | 648000000.0 | payload-units/month |
| replay_reingest_put_usd | 10.692 | USD/month |
| replay_post_reingest_read_mode | EFO | state |
| replay_post_reingest_read_capacity_rps | 4000.0 | source-records/s |
| replay_post_reingest_read_gb | 1267.34376 | GB/month |
| replay_post_reingest_read_usd | 18.629953 | USD/month |
| replay_post_reingest_read_capacity_state | CAPACITY_AVAILABLE | state |
| replay_consumer_invocations | 19440000.0 | invocations/month |
| replay_consumer_compute_usd | 29.808052 | USD/month |
| replay_sink_attempts | 1982880000.0 | attempts/month |
| replay_sink_projection_wru | 198288000.0 | WRU/month |
| replay_sink_projection_usd | 139.79304 | USD/month |
| replay_idempotency_rru | 1982880000.0 | RRU/month |
| replay_idempotency_usd | 280.57752 | USD/month |
| replay_reconciliation_attempts | 19828800.0 | attempts/month |
| replay_reconciliation_usd | 6.771535 | USD/month |
| replay_sink_demand_wru_s | 918.0 | WRU/s |
| replay_sink_capacity_headroom_wru_s | 1082.0 | WRU/s |
| replay_sink_capacity_state | CAPACITY_FEASIBLE | state |
| replay_drain_seconds | 216000.0 | s |
| replay_retained_probe_source_state | RETAINED_KINESIS_EFO | state |
| replay_retained_probe_effective_rate_rps | 3000.0 | source-records/s |
| replay_retained_probe_rate_bottleneck | KINESIS_SPARE | state |
| replay_retained_probe_drain_seconds | 216000.0 | s |
| replay_retained_probe_efo_usd | 18.629953 | USD/month |
| replay_retained_probe_s3_usd | 0.0 | USD/month |
| replay_retained_probe_reingest_usd | 0.0 | USD/month |
| replay_expired_probe_source_state | EXPIRED_S3_RESTORE_REINGEST | state |
| replay_expired_probe_efo_usd | 18.629953 | USD/month |
| replay_expired_probe_s3_usd | 4.411731 | USD/month |
| replay_expired_probe_reingest_usd | 10.692 | USD/month |
| replay_sink_limited_500_rate_rps | 1633.986928 | source-records/s |
| replay_sink_limited_500_drain_seconds | 396576.0 | s |
| replay_sink_limited_500_demand_wru_s | 500.0 | WRU/s |
| replay_sink_limited_500_state | SINK | state |
| replay_consumer_limited_rate_rps | 1000.0 | source-records/s |
| replay_consumer_limited_drain_seconds | 648000.0 | s |
| replay_consumer_limited_state | CONSUMER | state |
| replay_zero_spare_rate_rps | 0.0 | source-records/s |
| replay_zero_spare_drain_state | NO_SAFE_DRAIN | state |
| replay_zero_spare_drain_seconds | INFINITE | s |
| accepted_order_marginal_numerator_usd | 497.926323 | USD/numerator-period |
| accepted_order_marginal_usd | 0.000008 | USD/business-unit |
| accepted_order_allocated_numerator_usd | 4897.926323 | USD/numerator-period |
| accepted_order_allocated_usd | 0.00008 | USD/business-unit |
| accepted_order_fully_loaded_numerator_usd | 5897.926323 | USD/numerator-period |
| accepted_order_fully_loaded_usd | 0.000096 | USD/business-unit |
| accepted_order_denominator | 61560000.0 | business-units |
| execution_fill_marginal_numerator_usd | 497.926323 | USD/numerator-period |
| execution_fill_marginal_usd | 0.000007 | USD/business-unit |
| execution_fill_allocated_numerator_usd | 4897.926323 | USD/numerator-period |
| execution_fill_allocated_usd | 0.000066 | USD/business-unit |
| execution_fill_fully_loaded_numerator_usd | 5897.926323 | USD/numerator-period |
| execution_fill_fully_loaded_usd | 0.00008 | USD/business-unit |
| execution_fill_denominator | 73872000.0 | business-units |
| million_market_updates_marginal_numerator_usd | 871.371066 | USD/numerator-period |
| million_market_updates_marginal_usd | 0.067235 | USD/business-unit |
| million_market_updates_allocated_numerator_usd | 8571.371066 | USD/numerator-period |
| million_market_updates_allocated_usd | 0.661371 | USD/business-unit |
| million_market_updates_fully_loaded_numerator_usd | 10321.371066 | USD/numerator-period |
| million_market_updates_fully_loaded_usd | 0.796402 | USD/business-unit |
| million_market_updates_denominator | 12960.0 | business-units |
| active_account_month_marginal_numerator_usd | 124.481581 | USD/numerator-period |
| active_account_month_marginal_usd | 0.00249 | USD/business-unit |
| active_account_month_allocated_numerator_usd | 1224.481581 | USD/numerator-period |
| active_account_month_allocated_usd | 0.02449 | USD/business-unit |
| active_account_month_fully_loaded_numerator_usd | 1474.481581 | USD/numerator-period |
| active_account_month_fully_loaded_usd | 0.02949 | USD/business-unit |
| active_account_month_denominator | 50000.0 | business-units |
| projection_update_marginal_numerator_usd | 373.444742 | USD/numerator-period |
| projection_update_marginal_usd | 0.000002 | USD/business-unit |
| projection_update_allocated_numerator_usd | 3673.444742 | USD/numerator-period |
| projection_update_allocated_usd | 0.000015 | USD/business-unit |
| projection_update_fully_loaded_numerator_usd | 4423.444742 | USD/numerator-period |
| projection_update_fully_loaded_usd | 0.000018 | USD/business-unit |
| projection_update_denominator | 246240000.0 | business-units |
| retained_audit_year_marginal_numerator_usd | 1493.778969 | USD/numerator-period |
| retained_audit_year_marginal_usd | 746.889485 | USD/business-unit |
| retained_audit_year_allocated_numerator_usd | 14693.778969 | USD/numerator-period |
| retained_audit_year_allocated_usd | 7346.889485 | USD/business-unit |
| retained_audit_year_fully_loaded_numerator_usd | 17693.778969 | USD/numerator-period |
| retained_audit_year_fully_loaded_usd | 8846.889485 | USD/business-unit |
| retained_audit_year_denominator | 2.0 | business-units |
| scenario_half_marginal_usd | 1269.295808 | USD/month |
| scenario_half_accepted_order_marginal_usd | 0.000008 | USD/business-unit |
| scenario_half_accepted_order_allocated_usd | 0.000151 | USD/business-unit |
| scenario_half_accepted_order_fully_loaded_usd | 0.000184 | USD/business-unit |
| scenario_half_execution_fill_marginal_usd | 0.000007 | USD/business-unit |
| scenario_half_execution_fill_allocated_usd | 0.000126 | USD/business-unit |
| scenario_half_execution_fill_fully_loaded_usd | 0.000153 | USD/business-unit |
| scenario_half_million_market_updates_marginal_usd | 0.068558 | USD/business-unit |
| scenario_half_million_market_updates_allocated_usd | 1.256829 | USD/business-unit |
| scenario_half_million_market_updates_fully_loaded_usd | 1.526891 | USD/business-unit |
| scenario_half_active_account_month_marginal_usd | 0.002539 | USD/business-unit |
| scenario_half_active_account_month_allocated_usd | 0.046539 | USD/business-unit |
| scenario_half_active_account_month_fully_loaded_usd | 0.056539 | USD/business-unit |
| scenario_half_projection_update_marginal_usd | 0.000002 | USD/business-unit |
| scenario_half_projection_update_allocated_usd | 0.000028 | USD/business-unit |
| scenario_half_projection_update_fully_loaded_usd | 0.000034 | USD/business-unit |
| scenario_half_retained_audit_year_marginal_usd | 380.788742 | USD/business-unit |
| scenario_half_retained_audit_year_allocated_usd | 6980.788742 | USD/business-unit |
| scenario_half_retained_audit_year_fully_loaded_usd | 8480.788742 | USD/business-unit |
| scenario_double_marginal_usd | 4930.303231 | USD/month |
| scenario_double_accepted_order_marginal_usd | 0.000008 | USD/business-unit |
| scenario_double_accepted_order_allocated_usd | 0.000044 | USD/business-unit |
| scenario_double_accepted_order_fully_loaded_usd | 0.000052 | USD/business-unit |
| scenario_double_execution_fill_marginal_usd | 0.000007 | USD/business-unit |
| scenario_double_execution_fill_allocated_usd | 0.000036 | USD/business-unit |
| scenario_double_execution_fill_fully_loaded_usd | 0.000043 | USD/business-unit |
| scenario_double_million_market_updates_marginal_usd | 0.066574 | USD/business-unit |
| scenario_double_million_market_updates_allocated_usd | 0.363642 | USD/business-unit |
| scenario_double_million_market_updates_fully_loaded_usd | 0.431158 | USD/business-unit |
| scenario_double_active_account_month_marginal_usd | 0.002465 | USD/business-unit |
| scenario_double_active_account_month_allocated_usd | 0.013465 | USD/business-unit |
| scenario_double_active_account_month_fully_loaded_usd | 0.015965 | USD/business-unit |
| scenario_double_projection_update_marginal_usd | 0.000002 | USD/business-unit |
| scenario_double_projection_update_allocated_usd | 0.000008 | USD/business-unit |
| scenario_double_projection_update_fully_loaded_usd | 0.00001 | USD/business-unit |
| scenario_double_retained_audit_year_marginal_usd | 1479.090969 | USD/business-unit |
| scenario_double_retained_audit_year_allocated_usd | 8079.090969 | USD/business-unit |
| scenario_double_retained_audit_year_fully_loaded_usd | 9579.090969 | USD/business-unit |
| scenario_double_fanout_marginal_usd | 3347.042662 | USD/month |
| scenario_double_fanout_accepted_order_marginal_usd | 0.000011 | USD/business-unit |
| scenario_double_fanout_accepted_order_allocated_usd | 0.000082 | USD/business-unit |
| scenario_double_fanout_accepted_order_fully_loaded_usd | 0.000099 | USD/business-unit |
| scenario_double_fanout_execution_fill_marginal_usd | 0.000009 | USD/business-unit |
| scenario_double_fanout_execution_fill_allocated_usd | 0.000069 | USD/business-unit |
| scenario_double_fanout_execution_fill_fully_loaded_usd | 0.000082 | USD/business-unit |
| scenario_double_fanout_million_market_updates_marginal_usd | 0.090391 | USD/business-unit |
| scenario_double_fanout_million_market_updates_allocated_usd | 0.684527 | USD/business-unit |
| scenario_double_fanout_million_market_updates_fully_loaded_usd | 0.819557 | USD/business-unit |
| scenario_double_fanout_active_account_month_marginal_usd | 0.003347 | USD/business-unit |
| scenario_double_fanout_active_account_month_allocated_usd | 0.025347 | USD/business-unit |
| scenario_double_fanout_active_account_month_fully_loaded_usd | 0.030347 | USD/business-unit |
| scenario_double_fanout_projection_update_marginal_usd | 0.000002 | USD/business-unit |
| scenario_double_fanout_projection_update_allocated_usd | 0.000015 | USD/business-unit |
| scenario_double_fanout_projection_update_fully_loaded_usd | 0.000018 | USD/business-unit |
| scenario_double_fanout_retained_audit_year_marginal_usd | 1004.112799 | USD/business-unit |
| scenario_double_fanout_retained_audit_year_allocated_usd | 7604.112799 | USD/business-unit |
| scenario_double_fanout_retained_audit_year_fully_loaded_usd | 9104.112799 | USD/business-unit |
| scenario_replay_marginal_usd | 3961.683055 | USD/month |
| scenario_replay_accepted_order_marginal_usd | 0.000013 | USD/business-unit |
| scenario_replay_accepted_order_allocated_usd | 0.000084 | USD/business-unit |
| scenario_replay_accepted_order_fully_loaded_usd | 0.000101 | USD/business-unit |
| scenario_replay_execution_fill_marginal_usd | 0.000011 | USD/business-unit |
| scenario_replay_execution_fill_allocated_usd | 0.00007 | USD/business-unit |
| scenario_replay_execution_fill_fully_loaded_usd | 0.000084 | USD/business-unit |
| scenario_replay_million_market_updates_marginal_usd | 0.10699 | USD/business-unit |
| scenario_replay_million_market_updates_allocated_usd | 0.701126 | USD/business-unit |
| scenario_replay_million_market_updates_fully_loaded_usd | 0.836157 | USD/business-unit |
| scenario_replay_active_account_month_marginal_usd | 0.003962 | USD/business-unit |
| scenario_replay_active_account_month_allocated_usd | 0.025962 | USD/business-unit |
| scenario_replay_active_account_month_fully_loaded_usd | 0.030962 | USD/business-unit |
| scenario_replay_projection_update_marginal_usd | 0.000002 | USD/business-unit |
| scenario_replay_projection_update_allocated_usd | 0.000016 | USD/business-unit |
| scenario_replay_projection_update_fully_loaded_usd | 0.000019 | USD/business-unit |
| scenario_replay_retained_audit_year_marginal_usd | 1188.504916 | USD/business-unit |
| scenario_replay_retained_audit_year_allocated_usd | 7788.504916 | USD/business-unit |
| scenario_replay_retained_audit_year_fully_loaded_usd | 9288.504916 | USD/business-unit |
| scenario_replay_kinesis_usd | 1351.93566 | USD/month |
| scenario_replay_efo_retrieval_usd | 74.519813 | USD/month |
| scenario_replay_consumer_compute_usd | 119.232207 | USD/month |
| scenario_replay_sink_projection_usd | 559.17216 | USD/month |
| scenario_replay_idempotency_usd | 1122.31008 | USD/month |
| scenario_replay_reconciliation_usd | 27.086141 | USD/month |
| scenario_one_replica_marginal_usd | 3188.596816 | USD/month |
| scenario_one_replica_accepted_order_marginal_usd | 0.00001 | USD/business-unit |
| scenario_one_replica_accepted_order_allocated_usd | 0.000082 | USD/business-unit |
| scenario_one_replica_accepted_order_fully_loaded_usd | 0.000098 | USD/business-unit |
| scenario_one_replica_execution_fill_marginal_usd | 0.000009 | USD/business-unit |
| scenario_one_replica_execution_fill_allocated_usd | 0.000068 | USD/business-unit |
| scenario_one_replica_execution_fill_fully_loaded_usd | 0.000082 | USD/business-unit |
| scenario_one_replica_million_market_updates_marginal_usd | 0.086112 | USD/business-unit |
| scenario_one_replica_million_market_updates_allocated_usd | 0.680248 | USD/business-unit |
| scenario_one_replica_million_market_updates_fully_loaded_usd | 0.815278 | USD/business-unit |
| scenario_one_replica_active_account_month_marginal_usd | 0.003189 | USD/business-unit |
| scenario_one_replica_active_account_month_allocated_usd | 0.025189 | USD/business-unit |
| scenario_one_replica_active_account_month_fully_loaded_usd | 0.030189 | USD/business-unit |
| scenario_one_replica_projection_update_marginal_usd | 0.000002 | USD/business-unit |
| scenario_one_replica_projection_update_allocated_usd | 0.000015 | USD/business-unit |
| scenario_one_replica_projection_update_fully_loaded_usd | 0.000018 | USD/business-unit |
| scenario_one_replica_retained_audit_year_marginal_usd | 956.579045 | USD/business-unit |
| scenario_one_replica_retained_audit_year_allocated_usd | 7556.579045 | USD/business-unit |
| scenario_one_replica_retained_audit_year_fully_loaded_usd | 9056.579045 | USD/business-unit |
| scenario_one_replica_topology_state | GLOBAL_TABLE_ALL_REGIONS_BASE_RWRU_GSI_WRU | state |
| scenario_one_replica_region_count | 2.0 | Regions |
| scenario_one_replica_base_rwru_usd | 1118.34432 | USD/month |
| scenario_one_replica_gsi_wru_usd | 279.58608 | USD/month |
<!-- TASK10_RENDER_END -->

## Six fintech unit economics

The following reader-facing component summary and all 18 unit-cost cells are
generated from the same canonical result map validated below.

<!-- TASK10_TEACHING_BEGIN -->
| Component | USD/month |
|---|---:|
| lambda_monthly_usd | 43.908549 |
| ddb_monthly_usd | 1122.141535 |
| kinesis_monthly_usd | 1263.9698 |
| s3_monthly_usd | 59.611731 |
| marginal_platform_usd | 2489.631616 |

| Denominator | Marginal | Allocated | Fully loaded |
|---|---:|---:|---:|
| accepted_order | 0.000008 | 0.00008 | 0.000096 |
| execution_fill | 0.000007 | 0.000066 | 0.00008 |
| million_market_updates | 0.067235 | 0.661371 | 0.796402 |
| active_account_month | 0.00249 | 0.02449 | 0.02949 |
| projection_update | 0.000002 | 0.000015 | 0.000018 |
| retained_audit_year | 746.889485 | 7346.889485 | 8846.889485 |
<!-- TASK10_TEACHING_END -->

Accepted orders receive 20%, fills 20%, million market updates 35%, active
account-months 5%, projection updates 15%, and retained audit years 5% of the
audited numerator. The order denominator includes rejected work in cost;
execution retains partial-fill and correction risk; market updates include
duplicates, retries, fan-out and replay; accounts require a governed active
definition; projections expose write amplification; and audit uses retained
business-year cohorts rather than GB-year storage normalization. Illustrative
fixed burden is `$12,000` engineering + `$6,000` on-call + `$4,000` compliance
= `$22,000/month`; risk adds `$5,000/month`. Fixed engineering, on-call, and compliance work remains in the fully loaded numerator.

Allocation percentages are illustrative and sum to 100%. Reconcile rejected
orders, inactive accounts, duplicate identities, replay, retained cohorts,
corrections, and partial fills. Marginal, allocated, and fully loaded values
answer different questions (C113; F19,F20).

Audit storage is cohort-based, not an inverse-only divisor. At 100 GB ingested
each month, first-year exposure is `100*sum(1..12)=7,800 GB-month` and `$179.40`
for one retained business-year cohort. Cumulative two-year exposure is
`100*sum(1..24)=30,000 GB-month` and `$690.00`, or `$345.00/retained-year`.
At 24-month steady state, twelve billing months expose `100*24*12=28,800
GB-month`, `$662.40/year`, or `$331.20/retained-year`. Both storage numerator
and retained-year denominator move with policy; requests, lock, transition,
retrieval, KMS, export, restore and legal review remain named scenarios. The
canonical dated case types Object Lock, requests, transitions, retrieval, KMS,
export, and legal review individually at `$0/year`, classified
`ZERO_PLANNING_INPUTS_REPRICE_BEFORE_DECISION`; zero means excluded from this
illustration, not free in production, and each input independently reprices the
audit numerator and platform units.

## Batching and fan-out

Batches 1/10/100 yield 66,096,000 / 6,609,600 / 660,960 invocations. Under
the explicit KPL aggregation scenario, 700/7,000/70,000 B batches consume
1 / 1 / 3 priced 25-KiB Kinesis PUT payload units; flush 5 / 50 / 500 ms;
expected retry-plus-partial work is 0.03 / 0.30 / 3.00 extra record-attempts
per original batch. Conditional on a poison record before a durable partial
checkpoint, the maximum coupled batch is 1 / 10 / 100 records; partial batch
responses retain the successful prefix but do not make that worst case fractional.
Concurrency is 48 / 5 / 1; commits
66,744,000 / 6,674,400 / 667,440. Aggregation saves requests but raises
memory, flush latency, poison coupling, replay/redelivery scope, and isolation
cost (C73,C76,C113; A96,A98).

Three consumers plus retry/replay produce 41,601,600,000 consumer-records;
doubling fan-out produces 83,203,200,000. Fan-out multiplies deserialize,
transform, writes, logs, checkpoints, KMS, transfer, and reconciliation.
**Inference:** use batch 10 only while measured tail and redelivery guards hold.

## CQRS dated break-even

Preserve Task 7: `R/W = (variable projection/write + fixed/W) / avoided/read`.
An avoided read is four eventual RRUs. The dated alternative includes named
monthly components: `$94.392164` transport Lambda requests/compute,
`$173.599200` projection/index writes, `$150.000000` cache/storage,
`$8.679960` rebuild/replay, `$2.679914` reconciliation, `$900.000000`
engineering, `$300.000000` on-call, plus `$1,000/month` other fixed operations.
At 61,560,000 writes, break-even is `75.462912 reads/write`.

| Case | Reads/write | Net/month | Interpretation |
|---|---:|---:|---|
| Read-heavy | 50 | -$887.203238 | no economic win after complete dated burden |
| Mixed | 8 | -$2,350.607558 | no economic win |
| Write-heavy | 2 | -$2,559.665318 | no economic win |
| Zero avoided benefit | 0 | derived `NO_ECONOMIC_WIN_ZERO_BENEFIT` before division | undefined threshold; do not build for cost |

Half/double volume, half read benefit, and doubled fan-out are independently
recomputed in the canonical table. Measured projection p99 improves 120 ms to
25 ms (95 ms), with 2-s freshness. No read/write ratio alone justifies CQRS;
command authority and consistency remain upstream (C35,C46,C97,C100,C102,C113;
A113; F06,F19,F20).

## Kinesis and DynamoDB feasibility

Kinesis reuses Task 5: `ceil(max(peak*bytes/1,000,000,peak/1,000)*1.25/0.80)`
= 13 shards. Dated provisioned/EFO/PUT prices produce `$1,263.969800/month`.
Standard consumers need 10,500,000 B/s versus 26,000,000 B/s aggregate, but
per-shard skew and sink commits still bind. A 15% top key is 1,200 records/s,
infeasible on one 1,000-rps key lane. A cheap monthly average never proves a hot key or partition feasible.

Live 5,000 + safety 1,000 leaves 3,000 replay/s at 9,000 commits/s. The
explicit 30-hour replay age exceeds 24-hour retention, so the source is chosen
first as expired S3 archive, not silently read from Kinesis. Restoring 648M
700-byte records from 3,380 128-MiB archive objects costs `$0.185900` restore
requests + `$0.001352` GET requests + `$4.224479` retrieved bytes. Re-ingest
costs `$10.692000` for 648M Kinesis PUT units, then the selected canonical EFO
post-read costs `$18.629953` for 1,267.343760 GB across three replay consumers.
Effective rate is the minimum of restore source, consumer, stream re-ingest,
post-reingest EFO capacity, Kinesis spare, and sink: 3,000 records/s here, so
drain is 216,000 s and sink demand is 918 WRU/s. A retained-age probe uses EFO
directly (`$18.629953`) with no S3/re-ingest or second post-reingest read;
the 6,000-commit branch has no safe drain. Iterator age, committed rate,
throttles, source availability, sink demand, and retention margin govern
rollback (C70,C75,C77,C78,C114; A95,A97,A99,A126, retrieved 2026-08-22).

DynamoDB consumes Task 6's exact accepted-order path: four individually
rounded transaction targets—order 1.2 KiB, idempotency 0.7 KiB, outbox 1.6
KiB, and sentinel 0.2 KiB—cost `2*(ceil(1.2)+ceil(0.7)+ceil(1.6)+ceil(0.2))
= 12 WRU`; ordinary 0.45/0.35/0.45-KiB GSI entries add 3, totaling 15
WRU/order. `ddb_billing_aggregate_wru_s=1800` is only a billing-work
diagnostic; it has no feasibility state because those units do not land on one
physical partition lane. Typed hot shares produce
order/idempotency/outbox/sentinel lanes of 480/160/400/80 WRU/s and the three
GSI lanes of 80/60/100 WRU/s. The maximum actual lane is therefore the order
table at 480 WRU/s, leaving 520 WRU/s against the conservative 1,000-WRU/s
lane target. Only `ddb_max_hot_lane_state=FEASIBLE`, derived from that physical
maximum, authorizes the scenario's capacity conclusion. A 6-KiB item consumes 1 eventual, 2
strong, or 4 transactional RRUs.

The frozen lane descriptor is the single source for lane IDs, size and hot-share
inputs, base/GSI groups, billing operations, results, and verifier contracts.
In a single Region the 12 base plus 3 GSI units use ordinary WRUs. Adding one
replica creates two billed Regions: base writes consume replicated WRUs in both
Regions (`$1,118.344320/month`) and GSI writes consume ordinary WRUs in both
Regions (`$279.586080/month`). This follows AWS's global-table billing rule,
not a primary-plus-replica shortcut. The exact dated replicated-write SKU is
`Y8RETJA3NHS97536`; a synthetic unequal-price probe (ordinary WRU = 1,
replicated WRU = 2) produces 15 units single-Region and 54 units for two
Regions, proving the operation split even though today's two public prices are
equal. Replica storage, restore, and other
topology costs are typed zero planning scenarios and require repricing before
a topology decision. Streams, TTL deletes, backup/export, KMS, and lifecycle
paths remain separate. Capacity mode changes billing, not hot-key feasibility
(C82,C83,C85,C87,C89,C95,C114,C116; A100,A101,A104,A105,A107,A125,A127, retrieved
2026-08-22).

## Lambda versus sustained compute

The baseline is x86 Lambda, 1 GB, 80 ms, batch 10, 100 active events/s at a
25% duty cycle (25 time-averaged events/s) and measured headroom versus two
always-on Fargate tasks, 1 vCPU/2 GB each for 720 h. Baseline price-only totals
are `$10.134738` Lambda and `$71.092800` Fargate; they are not equal.
The two-task price basket is not functionally feasible: measured planning
service is 80 ms per ten-event batch, or 125 events/s/task, while the 400-rps
peak at 1.5 headroom requires five tasks. During a 30-s scale lag, two tasks
queue 4,500 events. The minimum feasible five-task fleet costs `$177.732000`.

The old fixed-five-task price equality is retained only as a counterfactual
candidate: `438.422795` time-averaged events/s converts to `1,753.691181`
active-period events/s and, preserving the measured 4x peak/active shape, a
`7,014.764726`-rps peak. That envelope requires 85 tasks after 1.5 headroom,
not five. Its capacity-feasible fleet costs `$3,021.444000/month` while Lambda
plug-back is `$177.732000/month`, a `$2,843.712000` gap with zero modeled
queue. A stepwise solve that recomputes peak, headroom, HA minimum, required
tasks, and fleet price at every rate through 10,000 average events/s reports
`NO_CAPACITY_FEASIBLE_PRICE_CROSSING`; no sustained equality is claimed.
Compare arrival shape, idle HA, scaling lag, warm/cold
tail, connections/state, downstream pools, patching, failover, deployment, and
FTE. Warm p99 180 ms meets a 200-ms target; cold p99 350 ms misses it.

Serverless is not universally cheaper; price parity is not decision parity.
Power Tuning is an experiment design, not a guarantee that more memory always lowers duration or cost.
Measure duration, cost, p50/p99/cold tail, architecture, and downstream effects
(C53,C115; A51,A58,A59,A67,A123,A124, retrieved 2026-08-22).

The exchange matcher remains outside Lambda unless actual scenario requirements
and measurements overturn the reviewed Task 9 boundary (C111,C115; F09).

## Cost-completeness matrix

Every cell classifies both sides; one-sided accounting is forbidden.

COMPLETE_HEADER|driver|batching|CQRS|Kinesis_DynamoDB|Lambda_sustained_compute|unit_economics

COMPLETE|eventbridge|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|sqs_sns|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|step_functions|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|api|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|storage|modeled_both|modeled_both|modeled_both|modeled_both|modeled_both
COMPLETE|retention_storage_class|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|cache_search_analytics|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|logs|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|traces|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|data_transfer|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|nat|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|kms|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|backup_export|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|retries_dlqs|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|replay_reconciliation|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|multi_az_region|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both
COMPLETE|support_discounts_tax|excluded_both:risk=invoice_variance|excluded_both:risk=invoice_variance|excluded_both:risk=invoice_variance|excluded_both:risk=invoice_variance|excluded_both:risk=invoice_variance
COMPLETE|engineering_oncall|modeled_both|modeled_both|modeled_both|modeled_both|modeled_both
COMPLETE|expected_correctness_availability_loss|scenario_both|scenario_both|scenario_both|scenario_both|scenario_both

`scenario_both` is not a free zero: messaging/API/orchestration needs request,
transition, payload, retry, and DLQ volumes; retention/storage, cache/search,
backup/export, and multi-Region need GB-month, retrieval, standby, RTO/RPO, and
drill inputs; logs/traces, transfer/NAT, and KMS need bytes, samples, routes,
and calls; replay/reconciliation needs retained reads, sink attempts,
validation, and operator hours. `excluded_both:risk=invoice_variance` leaves
invoice tiers, support, discounts, credits, commitments, and tax unresolved on
both sides.

GOVERN|correctness|C49|F19,F20|retrieved_2026-08-22|Inference:|Expected loss is an overlay and cannot waive correctness or mandatory audit evidence.
GOVERN|projection_authority|C102|A125,F19|retrieved_2026-08-22|Inference:|Projection economics never transfer command authority from the source of truth.
GOVERN|capacity|C113|A99,A125|retrieved_2026-08-22|Inference:|Peak skew and lane headroom govern feasibility independently of average price.
GOVERN|replay|C114|A99,F20|retrieved_2026-08-22|Inference:|Replay requires retained source data plus authoritative reconciliation of external effects.
GOVERN|serverless|C112|A123,A124,F20|retrieved_2026-08-22|Inference:|Price equality is evaluated separately from capacity SLO and operating-model parity.
GOVERN|fixed_cost|C49|F19,F20|retrieved_2026-08-22|Inference:|Engineering on-call compliance and other fixed work stay symmetric and visible.
GOVERN|denominator|C49|F19,F20|retrieved_2026-08-22|Inference:|Rejected duplicate replay and retained-cohort work cannot be hidden by denominator selection.

## Decision table

DECISION_HEADER|id|controlling_ratio|benefit|trade_off|poor_fit|measurement|migration_trigger|rollback_guard

DECISION|batching|request savings versus flush and failed-batch work|fewer invokes/commits|latency memory blast radius|strict latency or poison-prone|p99 flush redelivery commit rate|savings exceed error budget|restore prior batch on guard
DECISION|fan-out|useful consumers versus multiplied work|isolated views|bytes writes replay ownership|duplicate low-value views|consumer-records and sink commits|value exceeds full work|detach consumer preserve checkpoint
DECISION|CQRS projection|avoided reads versus variable plus fixed|read isolation|staleness rebuild reconciliation|hard-current decisions|reads avoided p99 freshness rebuild|ratio and SLO pass|serve authority/prior view
DECISION|Kinesis mode/EFO|peak skew utilization and contention|elastic/isolated pipes|commitment/EFO premium|one hot key|per-key rate age commits|threshold persists|restore shard/mode plan
DECISION|DynamoDB capacity/indexing|rounded lifecycle units and hot headroom|access latency|amplification/storage|relational ad-hoc|bytes units throttles|stable demand/index value|remove index/restore mode
DECISION|Lambda memory|GB-s versus duration/tail|faster execution|higher GB-s/downstream burst|bad sample|Power Tuning cost p99 cold|measured frontier|restore memory
DECISION|Lambda versus Fargate/EC2|duty-cycle break-even plus operations|scale-to-zero/state reuse|cold/scaling or idle/patching|matcher without evidence|duty tail connections FTE|total-cost trigger|weighted cutback
DECISION|logs/traces|diagnostic value per byte|detection/audit|ingest storage query cost|indiscriminate payloads|bytes query yield MTTR|waste cut preserves controls|restore sampling
DECISION|retention/storage class|retrieval probability and RTO versus GB-month|lower cold storage|fee/delay complexity|fast evidence retrieval|age retrieval legal policy|RTO and policy pass|restore hot class
DECISION|multi-Region standby|loss avoided and RTO/RPO versus burden|regional resilience|replication fencing drills|undefined writer/failback|game-day RTO/RPO/FTE|tested objective justifies|fence secondary

## Sensitivity and falsification

Half/double traffic require 7/25 shards and reprice marginal totals to
their canonical scenario values; all six marginal, allocated, and fully
loaded business-unit metrics are recomputed. Doubled fan-out is
83,203,200,000 consumer-records/month; the 20% replay case is 2,592,000,000
source records. Its retrieval, restore/request, re-ingest, consumer,
projection-sink, idempotency, and reconciliation components are separately
mutable and fully recomputed. A tenfold 60-s burst asks 48
concurrent order Lambdas and grows the stream queue by 4,300,800 records.
The retained branch rereads Kinesis through EFO and creates no producer PUT;
the expired branch restores S3, republishes through priced Kinesis PUT, and
then charges the selected EFO read before replay consumers and sinks. At the
20% replay sensitivity that EFO read is 5,069.375038 GB / `$74.519813`.
Both price consumer requests/compute, three sink attempt paths,
duplicate/idempotency reads, reconciliation, and projection writes, then use
the effective minimum rate for sink demand and drain. At baseline, 648M replay
records drain in 216,000 s. A 500-WRU/s sink limits effective source rate to
1,633.986928 records/s and drain to 396,576 s; a 1,000-rps consumer limits it
to 1,000 records/s and 648,000 s; zero stream spare reports `NO_SAFE_DRAIN`
and `INFINITE` rather than dividing by zero.
Hot-key branches fail while averages look cheap.
Exact component shares are derived directly from the canonical numerator and sum
to 100%, and fixed work still dominates fully loaded economics. Adding one
DynamoDB replica increases marginal cost to its canonical scenario value; its
two-Region base and GSI totals are `$1,118.344320` and `$279.586080`.
All six marginal, allocated, and fully loaded unit metrics are recomputed for
that regional topology. Fan-out work elasticity
is 1; shard elasticity is discontinuous.

**Inference:** falsify batch 10 on tail/redelivery; EFO when standard per-shard
measurements fit without isolation value; CQRS below break-even or failed
freshness/rebuild; Lambda when the stepwise capacity-priced comparison, cold
tail, or operating model fails its measured guard; a
capacity plan on hottest-key, age, throttle, or drain breach. Migrate by
shadow/canary and bounded rate; roll back before correctness, freshness, queue
age, or recovery guards fail.

## Senior quantitative interview questions

QUESTION|Q1|Derive Kinesis shards from peak bytes/records, skew and headroom.|13 shards; still reject 1,200-rps hot key.
QUESTION|Q2|Compare batches 1, 10, 100.|Quantify requests chunks flush concurrency redelivery commits.
QUESTION|Q3|When does CQRS pay?|Full variable plus fixed equation; then authority freshness rebuild.
QUESTION|Q4|Why can DynamoDB look cheap but fail?|Average cannot prove a physical lane; evaluate each table and index lane, here max 480 WRU/s.
QUESTION|Q5|Lambda or sustained worker?|Recompute capacity-priced fleets stepwise; here there is no feasible price crossing, then compare tail scaling idle HA connections failover FTE.
QUESTION|Q6|Exact prices unavailable: estimate cost per fill.|Keep symbols/units, estimate ranges and name missing measurements.
QUESTION|Q7|Can replay clear 4.5M?|Only positive commit-live-safety; 3,000/s drains 1,500 s.
QUESTION|Q8|Optimization order?|Correctness/audit, SLO, waste, config, substrate; state rollback.

## Sources

Framing: F19,F20; claims: C49,C102,C112,C113,C114,C115,C116. Mutable AWS routes
retrieved 2026-08-22: A44,A45,A46,A51,A67,A75,A95,A99,A100,A101,A102,A103,
A104,A105,A107,A123,A124,A125,A126,A127. Publications:
Lambda `2026-08-19T22:47:03Z`, ECS `2026-07-07T16:06:51Z`, DynamoDB
`2026-08-15T03:52:56Z`, Kinesis `2026-08-13T19:39:54Z`, S3
`2026-08-18T18:11:13Z`. Workload/people values are illustrative planning
assumptions, not service promises or production measurements.