Sidekiq · question
Q.04 of 50
What is Redis and why does Sidekiq use it?
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Redis is an in-memory data structure store used as a database, cache, and message broker. Sidekiq uses Redis because:
- Speed: In-memory storage provides extremely fast read/write operations
- Data Structures: Redis lists provide perfect queue semantics
- Atomicity: Redis operations are atomic, preventing race conditions
- Persistence: Optional persistence ensures jobs survive restarts
- Pub/Sub: Enables real-time communication between components
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