Open Amazon S3 (Object Storage) →Open URL Shortener →

Amazon S3 (Object Storage) vs URL Shortener

Amazon S3 (Object Storage)

Strongly consistent object storage: a metadata plane that locates objects, and a replicated (or erasure-coded) data plane spread across availability zones.

Components (9)

Client
API Service
Identity & Access Mgmt
Metadata Service
Data Routing Service
Placement Service
Primary Data Node · AZ1
Secondary · AZ2
Secondary · AZ3

Headline numbers

Erasure-coding overhead vs replication~50% less
Expected object losses / yr per 10B objects~0.1
Per-prefix QPS ceiling~5,500 GET / 3,500 PUT

URL Shortener

Hashing, key generation, read-heavy caching.

Components (6)

Client
API Gateway
Write Service
Read Service
Redis
Postgres

Headline numbers

Write QPS (avg)~1,200/sec
Read QPS (avg)~120,000/sec
Storage per year~5 TB

Key differences

Only in Amazon S3 (Object Storage)

Primary Data Node · AZ1

In both

Client
Api Gateway
Service
Database

Only in URL Shortener

Redis

Flow shape

Amazon S3 (Object Storage) flows

PUT an object (replication)8 steps
GET an object5 steps
⚠ Alternative: erasure coding + AZ loss5 steps
⚠ Primary data node fails3 steps

URL Shortener flows

Shorten a URL3 steps
Resolve short URL (cache hit)3 steps
Resolve short URL (cache miss)4 steps
⚠ Redis is down4 steps