Redis , by SS, is an in-memory data structure store.
| Website | https://redis.io |
| Repository | https://github.com/redis/redis |
| Latest release | 7.x |
| License | BSD-3-Clause before version 7.4, Redis Source Available License v2 or Server Side Public License v1 since. |
| Maintainer | Redis Ltd. |
Redis is an in-memory data structure store that persists on disk. The data model is key-value, but many different kinds of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes. It is somewhat like memcached but persistent.
Redis is implemented in C with a test suite written in Tcl. The test suite includes a Tcl client library .
Salvatore Sanfilippo aka "antirez" implemented the first version of Redis in Tcl. It was then called "LMDB" (unrelated to LMDB). He has published its source code as a Gist on GitHub.
In June 2020 SS stepped down as the maintainer of Redis. In March 2024 Redis Ltd. announced it was switching Redis to dual source-available licensing , leading to forks. LWN.net covered the event in "The race to replace Redis" .
Retcl is an event-driven, object-oriented, Redis client library targeting the Tcl scripting language.
Things that Retcl does which are missing in Salvatore's client are:
There is another client library in the disque client implementation.
redis-tcl : Tcl library for Redis access.
Since version 0.81, Jim Tcl can be built with a Redis-client C extension.
You can find a basic Redis client library in pure Jim Tcl in jimhttp. The library also works in Tcl 8.6 and later.
Jim Tcl was originally another project of antirez.