Redis 6, the latest model of the in-memory database and cache system, moved to common availability at this time. The launch introduces many new options whereas sustaining almost full backward compatibility with Redis 5.
Among essentially the most vital adjustments in Redis 6 is threading for I/O, a long-desired characteristic now accessible as an choice. With I/O threading enabled, Redis’s creators declare the database can serve as much as twice as many operations as earlier than on a single occasion.
Redis’s builders have historically resisted including threads as a result of they imagine it’s tough to implement with out compromising Redis’s sharded and shared-nothing structure. However, forks of Redis together with Thredis and KeyDB present their very own implementations of threading; KeyDB claims as much as a fivefold enchancment in efficiency by doing so. Redis 6 implements threading to a lesser extent than these forks, however however yields vital efficiency enhancements, with out making main architectural adjustments.
Redis 6 additionally introduces a number of main safety features. Access management lists inside Redis allow you to prohibit customers to sure instructions or to sure key patterns. Another key safety addition is assist for SSL on all channels, even when Redis isn’t uncovered on a public-facing connection. Using SSL even for personal communications between software program parts has grow to be customary apply.
Redis’s module system, launched in model four to permit Redis performance to be expanded by third-party builders, receives a slew of latest APIs in model 6. For occasion, arbitrary module knowledge will be saved in RDB recordsdata (the on-disk binary format for a Redis in-memory retailer) and lots of extra server and shopper occasions will be hooked, captured, and rewritten.
Redis 6 additionally brings experimental assist for client-side caching of values; expanded assist for diskless (memory-to-memory) replication; a brand new protocol, RESP3, which permits higher sort inference on responses; and extra tunable however essentially sooner eviction of expired keys.
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