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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
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

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
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

Read-Heavy SaaS API→Multi-Tenant SaaS Platform
−3 removed+9 added6 unchanged

Components

7

Read-Heavy SaaS API

11

Multi-Tenant SaaS Platform

5 shared−2+6

Failure Modes

2

Read-Heavy SaaS API

4

Multi-Tenant SaaS Platform

1 shared−1+3

Connections

6

Read-Heavy SaaS API

7

Multi-Tenant SaaS Platform

4 shared−2+3

Components

5 shared−2 left only+6 right only
=
Read-Heavy API Backendworkload
workload
=
PostgreSQLprimary datastore
data management
=
Rediscache
acceleration
=
Connection Poolingarchitecture pattern
interface or access
=
Connection Pool Exhaustionoperational risk
operational risk
−
Read Replicaarchitecture pattern
application logic
−
Replication Lag Cascadeoperational risk
operational risk
+
Mixed OLTP (SaaS Core)workload
workload
+
Cache-Asidearchitecture pattern
application logic
+
Shardingarchitecture pattern
application logic
+
Hot Partitionoperational risk
operational risk
+
N+1 Query Problemoperational risk
operational risk
+
Tenant Noisy Neighboroperational risk
operational risk

Failure Modes

1 shared−1 left only+3 right only
=
Connection Pool Exhaustion1 nodes affected
high
−
Replication Lag Cascade1 nodes affected
moderate
+
Hot Partition1 nodes affected
highhigh
+
N+1 Query Problem1 nodes affected
moderate
+
Tenant Noisy Neighbor0 nodes affected
highhigh

Connections

4 shared−2 left only+3 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
=
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
−
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
+
Redis clients hold persistent TCP connections per thread or goroutine. Under connection pool misconfiguration or sudden traffic spikes, the Redis server can exhaust its maxclients limit, causing cascading cache misses that amplify load on the primary database.
introduces riskrisk path
+
Read-heavy API workloads amplify N+1 query patterns: loading a list of N entities and then issuing N individual queries for related data causes database query count to grow proportionally with response size, exhausting connection pools and causing latency spikes under load.
vulnerable torisk path
+
Sharding distributes data across partitions, but poor shard key selection concentrates traffic on a small number of shards. A hot partition receives disproportionate load, becomes a bottleneck, and degrades performance for all data on that shard.
introduces riskrisk path

Six-Dimension Assessment

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

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

Complexity

← Read-Heavy

moderate complexity, 11 nodes, 7 edges, 4 risks, 3 simulation seeds

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

Operational Risk

← Read-Heavy

4 risks (top: high), 3 high/critical, 2 confirmed by simulation

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

Scalability

depends

4 scaling thresholds, 3 migration paths, 9 advisor scaling signals

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

Operational Maturity

tie

Advisor assessment: Intermediate; recommended team: Small Product Team; 6 operational requirements

8 watched metrics, 3 observability recommendations, 2 simulation seeds

Observability

← Read-Heavy

9 watched metrics, 6 observability recommendations, 3 simulation seeds

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

Generator Readiness

Multi-Tenant →

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

Full comparison + decision path →Topology: Read-Heavy SaaS API →Topology: Multi-Tenant SaaS Platform →