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Architecture Structural Diff

Compare two scenarios node-by-node. See exactly which components, failure modes, and connections are shared, removed (−), or added (+) when switching from the left scenario to the right.

Select Scenarios to Diff

left, removals (−)

AI Retrieval-Augmented Generation Platform
high

AI / RAG

API Gateway Platform
high

Multi-Tenant SaaS

Analytics Data Platform
high

Analytics

Audit and Compliance Platform
high✓

Financial Ledger

Content Management Platform
moderate

Read-Heavy

Developer Tools Platform
high

Multi-Tenant SaaS

Distributed Job Queue Platform
moderate

Write-Heavy

E-Commerce Order Platform
high

Marketplace

Event-Driven Analytics Pipeline
high

Event-Driven

Financial Ledger Platform
expert

Financial Ledger

Gaming Backend Platform
high

Realtime Collab

Geospatial Tracking Platform
high

Realtime Collab

Healthcare Records Platform
expert

Financial Ledger

IoT Telemetry Ingestion Platform
high

Write-Heavy

ML Feature Serving Platform
expert

AI / RAG

Multi-Tenant SaaS Platform
moderate

Multi-Tenant SaaS

Notification Delivery Platform
moderate

Event-Driven

Observability Platform
high

Analytics

Read-Heavy SaaS API
Realtime Collaborative Editor
expert

Realtime Collab

Search-Heavy Content Platform
high

Search-Heavy

Social Feed Platform
high

Event-Driven

Streaming Media Platform
high

Event-Driven

Two-Sided Marketplace Platform
expert

Marketplace

Write-Heavy Transactional Platform
high

Write-Heavy

right, removals (−)

AI Retrieval-Augmented Generation Platform
high

AI / RAG

API Gateway Platform
high

Multi-Tenant SaaS

Analytics Data Platform
high

Analytics

Audit and Compliance Platform
Content Management Platform
moderate

Read-Heavy

Developer Tools Platform
high

Multi-Tenant SaaS

Distributed Job Queue Platform
moderate

Write-Heavy

E-Commerce Order Platform
high

Marketplace

Event-Driven Analytics Pipeline
high

Event-Driven

Financial Ledger Platform
expert

Financial Ledger

Gaming Backend Platform
high

Realtime Collab

Geospatial Tracking Platform
high

Realtime Collab

Healthcare Records Platform
expert

Financial Ledger

IoT Telemetry Ingestion Platform
high

Write-Heavy

ML Feature Serving Platform
expert

AI / RAG

Multi-Tenant SaaS Platform
moderate

Multi-Tenant SaaS

Notification Delivery Platform
moderate

Event-Driven

Observability Platform
high

Analytics

Read-Heavy SaaS API
moderate✓

Read-Heavy

Realtime Collaborative Editor
expert

Realtime Collab

Search-Heavy Content Platform
high

Search-Heavy

Social Feed Platform
high

Event-Driven

Streaming Media Platform
high

Event-Driven

Two-Sided Marketplace Platform
expert

Marketplace

Write-Heavy Transactional Platform
high

Write-Heavy

Audit and Compliance Platform→Read-Heavy SaaS API
−17 removed+4 added5 unchanged

Components

17

Audit and Compliance Platform

7

Read-Heavy SaaS API

4 shared−13+3

Failure Modes

5

Audit and Compliance Platform

2

Read-Heavy SaaS API

1 shared−4+1

Connections

0

Audit and Compliance Platform

6

Read-Heavy SaaS API

0 shared+6

Components

4 shared−13 left only+3 right only
=
PostgreSQLprimary datastore
data management
=
Rediscache
acceleration
=
Read Replicaarchitecture pattern
application logic
=
Replication Lag Cascadeoperational risk
operational risk
−
Write-Heavy Transactionalworkload
workload
−
Event Streamingworkload
workload
−
Apache Kafkaevent stream
async processing
−
ClickHouseprimary datastore
data management
−
Event Sourcingarchitecture pattern
application logic
−
Change Data Capture via WALarchitecture pattern
application logic
−
Time Series Rolluparchitecture pattern
application logic
−
Index Tablearchitecture pattern
application logic
−
Transactional Outbox Patternarchitecture pattern
application logic
−
WAL Saturationoperational risk
operational risk
−
Write Amplification Cascadeoperational risk
operational risk
−
Lock Contentionoperational risk
operational risk
−
Disk I/O Saturationoperational risk
operational risk
+
Read-Heavy API Backendworkload
workload
+
Connection Poolingarchitecture pattern
interface or access
+
Connection Pool Exhaustionoperational risk
operational risk

Failure Modes

1 shared−4 left only+1 right only
=
Replication Lag Cascade1 nodes affected
moderate
−
WAL Saturation1 nodes affected
highhigh
−
Write Amplification Cascade0 nodes affected
highhigh
−
Lock Contention1 nodes affected
highhigh
−
Disk I/O Saturation0 nodes affected
highhigh
+
Connection Pool Exhaustion1 nodes affected
highhigh

Connections

+6 right only
+
Redis caching absorbs repeated read requests at the edge, reducing database load and latency for high read-to-write ratio workloads by orders of magnitude.
mitigates
+
Read-heavy APIs benefit directly from Redis as a caching tier that absorbs repeated identical reads and provides sub-millisecond response times for hot data, reducing both latency and database load.
benefits from
+
Read-heavy APIs generate large numbers of short-lived database connections. Connection pooling reduces per-request connection overhead and allows the database to serve far more concurrent requests than its max_connections limit.
benefits from
+
PostgreSQL's built-in streaming replication provides the replication substrate that makes the read replica pattern operational. Physical and logical replication are both supported, enabling read scaling without data modification.
supports
+
The read replica pattern is structurally vulnerable to replication lag cascade because its value proposition: serving reads from replicas: depends on replica data being sufficiently current. Any condition that delays WAL replay degrades or invalidates the replica's usefulness.
vulnerable torisk path
+
A connection pool bounds the total database connections an application can open, preventing connection storms during traffic spikes and protecting the database server from exceeding its connection limit.
mitigates

Six-Dimension Assessment

Structural comparison across complexity, risk, scalability, maturity, observability, and generator readiness.

high complexity, 17 nodes, 0 edges, 5 risks, 3 simulation seeds

Complexity

Read-Heavy →

moderate complexity, 7 nodes, 6 edges, 2 risks, 2 simulation seeds

5 risks (top: high), 5 high/critical, 1 confirmed by simulation

Operational Risk

Read-Heavy →

2 risks (top: high), 2 high/critical, 2 confirmed by simulation

4 scaling thresholds, 3 migration paths, 6 advisor scaling signals

Scalability

depends

4 scaling thresholds, 2 migration paths, 9 advisor scaling signals

Advisor assessment: Advanced; recommended team: Experienced Backend Team; 11 operational requirements

Operational Maturity

Read-Heavy →

Advisor assessment: Intermediate; recommended team: Experienced Backend Team; 7 operational requirements

8 watched metrics, 6 observability recommendations, 3 simulation seeds

Observability

Read-Heavy →

8 watched metrics, 3 observability recommendations, 2 simulation seeds

generator relevance documented; topology generation relevance noted; simulation relevance noted; 3 seeds with generator notes

Generator Readiness

← Audit

generator relevance documented; topology generation relevance noted; simulation relevance noted; 2 seeds with generator notes

Full comparison + decision path →Topology: Audit and Compliance Platform →Topology: Read-Heavy SaaS API →