Persistence Options in Redis
Redis offers different persistence options to ensure data durability:
- RDB Snapshot: Redis periodically saves a point-in-time snapshot of the dataset to disk, which can be configured at intervals. RDB snapshots provide good disk space efficiency.
- AOF (Append-Only File): Redis logs every write operation in an append-only log file. This log can be used to reconstruct the dataset in case of data loss. AOF is more durable but can be larger in size.
- Hybrid Persistence: Redis allows you to use a combination of RDB and AOF for both efficiency and durability.
How does Redis store data?
Redis is an in-memory data store. It stores data primarily in RAM, allowing extremely fast read and write operations. The data is organized using key-value pairs, where keys are unique identifiers, and values can be of different types, including strings, lists, sets, sorted sets, hashes, bitmaps, and more. Data in Redis is accessed by keys, making it a highly efficient and simple data store.
Important Topics for How Redis Stores data
- Data Structures in Redis
- Persistence Options in Redis
- Partitioning in Redis
- Virtual Memory in Redis
- Data Eviction
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