Redis
In-memory cache and data structures.
DatabaseOpen source
In-memory data structure store, used as a cache, queue and key-value database. Optional persistence to disk.
When to use
For caching, queues, sessions and counters where memory speed matters.
When to avoid
As the main database for data that cannot be lost; persistence is not its strong suit.
Related
From the same area, with a close purpose.
Open source fork of Redis, maintained by the Linux Foundation.
DatabaseOpen source★ 27.6KSimple, very fast memory cache.
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