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Why Netflix Doesn’t Trust Auto-Increment IDs: The Untold Power of UUIDs in a Distributed World
- In distributed systems, companies like Netflix opt for UUIDs over auto-incrementing IDs for scalability.
- Auto-increment IDs pose challenges in horizontally scaled, geo-redundant, and high-traffic systems.
- Issues with auto-increment IDs include collisions, poor mergeability, and predictability concerns.
- UUIDs provide globally unique IDs without central authority, with versions like v1, v4, and v5 for different use cases.
- Netflix employs a Snowflake-inspired ID generation system for unique, time-sortable IDs across instances.
- UUID v7, offering ordered generation and timestamp encoding, is gaining popularity for improved database performance.
- Using UUID v7 or Snowflake-style generators is recommended over v4 or auto-increment for new systems.
- Careful consideration of ID generation is crucial for scalable distributed systems to avoid performance pitfalls.
- Choosing timestamped, decentralized IDs benefits event-driven pipelines and global-scale platforms.
- Transition from UUID v4 to ULIDs can enhance performance in cases of random insertion patterns in large databases.
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