Redis is an advanced key-value store. It is often referred to as a data
structure server since keys can contain strings, hashes, lists, sets and
You can run atomic operations on these types, like appending to a string;
incrementing the value in a hash; pushing to a list; computing set
intersection, union and difference; or getting the member with highest
ranking in a sorted set.
In order to achieve its outstanding performance, Redis works with an
in-memory dataset. Depending on your use case, you can persist it either
by dumping the dataset to disk every once in a while, or by appending
each command to a log.
Redis also supports trivial-to-setup master-slave replication, with very
fast non-blocking first synchronization, auto-reconnection on net split
and so forth.
Other features include Transactions, Pub/Sub, Lua scripting, Keys with a
limited time-to-live, and configuration settings to make Redis behave like
You can use Redis from most programming languages also.
**Redis 7.0.9** - Released Tue Feb 28 12:00:00 IST 2023 Upgrade urgency:
SECURITY, contains fixes to security issues. Security Fixes: *
(**CVE-2023-25155**) Specially crafted SRANDMEMBER, ZRANDMEMBER, and HRANDFIELD
commands can trigger an integer overflow, resulting in a runtime assertion and
termination of the Redis server process. * (**CVE-2022-36021**) String matching
commands (like SCAN or KEYS) with a specially crafted pattern to trigger a
denial-of-service attack on Redis, causing it to hang and consume 100% CPU
time. Bug Fixes * Fix a crash when reaching the maximum invalidations limit of
client-side tracking (#11814) * Fix a crash when SPUBLISH is used after passing
the cluster-link-sendbuf-limit (#11752) * Fix possible memory corruption in
FLUSHALL when a client watches more than one key (#11854) * Fix cluster inbound
link keepalive time (#11785) * Flush propagation list in active-expire of
writable replicas to fix an assertion (#11615) * Avoid propagating DEL of lazy
expire from SCAN and RANDOMKEY as MULTI-EXEC (#11788)