Taka

Taka: 2 services, 18 components and 26 connections on 3 hosts — takabachan-social and takabachan-ecommerce.

A multi-service system design shared from System Canvas. A plain-text version of this design is available as Markdown.

How the services connect

Components

  • takabachan-social (Microservice), in VPC Takabachan VPC
  • takabachan-ecommerce (Microservice), in VPC Takabachan VPC
  • User / Client: Requests Per Second: 10000 req/s; Protocol: HTTPS
  • Cloudflare Worker (API Gateway): Protocol: HTTPS; Rate Limit (req/s): 0 req/s
  • Cloudflare CDN (CDN): TTL: 3600 s; Cache Hit Rate: 0.8
  • Meilisearch (Elasticsearch), in VPC Takabachan VPC, on host VPS: Cluster Nodes: 1; RAM per Node: 8,192 MB; Request Absorption Rate: 1
  • NATs Stream (Message Queue), in VPC Takabachan VPC, on host VPS: Queue Type: Standard; Visibility Timeout: 30 s; Request Absorption Rate: 1
  • Valkey (In-Memory Cache), in VPC Takabachan VPC, on host VPS: Memory: 4,096 MB; Max Connections: 10000; Cache Hit Rate: 0.9; Request Absorption Rate: 1; Enable Sharding: off
  • Worker: Image/Video (Service Worker), in VPC Takabachan VPC, on host VPS: Worker Threads: 4 workers; Avg Job Duration: 100 ms; Max Queue Depth: 500; Retry on Failure: off; Memory / Worker: 64 MB; CPU-Bound Share of a Job: 0.5; Request Absorption Rate: 1
  • R2 (Object Storage): Throughput (MB/s): 100 MB/s; Storage Class: Standard; Presigned URLs: off; Prefix Shards: 1; Encryption: None; Transfer Acceleration: off; Request Absorption Rate: 1
  • Mail Server: Daily Send Limit: 50000; Concurrent Conns: 50; Protocol: SMTP; Request Absorption Rate: 1

Connections

  • User / Client → Cloudflare CDN (HTTPS, cache path)
  • Cloudflare CDN → Cloudflare Worker (HTTPS)
  • Cloudflare Worker → takabachan-ecommerce (HTTP)
  • Cloudflare Worker → Meilisearch (TCP, cache path)
  • Cloudflare Worker → takabachan-social (HTTP)
  • takabachan-social → Valkey (TCP, cache path)
  • takabachan-social → NATs Stream (TCP)
  • NATs Stream → takabachan-ecommerce (TCP)
  • NATs Stream → takabachan-social (TCP)
  • Meilisearch → takabachan-ecommerce (HTTP)
  • Meilisearch → takabachan-social (HTTP)
  • takabachan-ecommerce → NATs Stream (TCP)
  • takabachan-ecommerce → Valkey (TCP, cache path)
  • takabachan-ecommerce → Worker: Image/Video (HTTPS)
  • takabachan-social → Worker: Image/Video (HTTPS)
  • Worker: Image/Video → R2 (HTTPS)
  • Worker: Image/Video → Mail Server (HTTPS)
  • Cloudflare Worker → Valkey (HTTPS)

Machines

  • VPS: 10 vCPU, 16,384 MB RAM, 1000 Mbps, shared by Meilisearch, NATs Stream, Valkey, Worker: Image/Video

Networks

  • Takabachan VPC (us-east-1, 10.0.0.0/16): takabachan-social, takabachan-ecommerce, Meilisearch, NATs Stream, Valkey, Worker: Image/Video

Service: takabachan-social

Components

  • SQL Database, on host VPS: RAM: 4,096 MB; Max Connections: 100; IOPS: 500; Partitioning: None; Enable Sharding: off; Request Absorption Rate: 1
  • Server / VM, on host VPS: RAM: 2,048 MB; CPU Cores: 2; Max Connections: 1000; Request Absorption Rate: 1
  • Service Worker, on host VPS: Worker Threads: 4 workers; Avg Job Duration: 100 ms; Max Queue Depth: 500; Retry on Failure: off; Memory / Worker: 64 MB; CPU-Bound Share of a Job: 0.5; Request Absorption Rate: 1
  • Traefik (Container), on host VPS: CPU Limit (cores): 0.5 cores; Memory Limit: 512 MB; CPU Request (cores): 0.5 cores; Memory Request: 512 MB; Min Replicas: 1; Max Replicas: 1; Scale On: CPU utilization (HPA, target tracking); Target CPU: 70 % of request; Request Absorption Rate: 1
  • R2 (Object Storage): Throughput (MB/s): 100 MB/s; Storage Class: Standard; Presigned URLs: off; Prefix Shards: 1; Encryption: None; Transfer Acceleration: off; Request Absorption Rate: 1

Connections

  • Server / VM → SQL Database (TCP)
  • Server / VM → Service Worker (TCP)
  • Traefik → Server / VM (HTTP)
  • SQL Database → R2 (HTTPS)

Machines

  • VPS: 6 vCPU, 8,192 MB RAM, 1000 Mbps, shared by SQL Database, Server / VM, Service Worker, Traefik

Service: takabachan-ecommerce

Components

  • Server / VM, on host VPS: RAM: 2,048 MB; CPU Cores: 2; Max Connections: 1000; Request Absorption Rate: 1
  • SQL Database, on host VPS: RAM: 4,096 MB; Max Connections: 100; IOPS: 500; Partitioning: None; Enable Sharding: off; Request Absorption Rate: 1
  • Service Worker, on host VPS: Worker Threads: 4 workers; Avg Job Duration: 100 ms; Max Queue Depth: 500; Retry on Failure: off; Memory / Worker: 64 MB; CPU-Bound Share of a Job: 0.5; Request Absorption Rate: 1
  • Traefik (Container), on host VPS: CPU Limit (cores): 0.5 cores; Memory Limit: 512 MB; CPU Request (cores): 0.5 cores; Memory Request: 512 MB; Min Replicas: 1; Max Replicas: 1; Scale On: CPU utilization (HPA, target tracking); Target CPU: 70 % of request; Request Absorption Rate: 1
  • R2 (Object Storage): Throughput (MB/s): 100 MB/s; Storage Class: Standard; Presigned URLs: off; Prefix Shards: 1; Encryption: None; Transfer Acceleration: off; Request Absorption Rate: 1

Connections

  • Server / VM → SQL Database (TCP)
  • Server / VM → Service Worker (TCP)
  • Traefik → Server / VM (HTTP)
  • SQL Database → R2 (HTTPS)

Machines

  • VPS: 6 vCPU, 8,192 MB RAM, 1000 Mbps, shared by Server / VM, SQL Database, Service Worker, Traefik

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