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Memcached

Distributed in-memory key-value cache for accelerating web applications.

Memcached is a simple, fast, distributed memory object cache, originally written for LiveJournal and now used by countless web services to cache database query results, rendered HTML fragments, and session data. It exposes a simple text- and binary-protocol and supports horizontal scale-out by client-side sharding.

Redis has displaced Memcached for many use cases, but Memcached remains in wide use where pure caching with minimal overhead is preferred.

Debian/Ubuntu: sudo apt install memcached
Fedora:        sudo dnf install memcached
Arch:          sudo pacman -S memcached