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docs: adds deprecation notice for redis caching #9700

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Expand Up @@ -6,6 +6,10 @@ description: "Learn how to configure Grafana Mimir to use external Redis as cach

# Configure Redis cache

{{< admonition type="caution" >}}
Starting with Mimir version 2.14, the experimental support for Redis caching is deprecated. It will be removed in a future release. You are encouraged to switch to Memcached.
{{< /admonition >}}

Besides support for Memcached, Mimir also supports Redis for the chunks-cache, index-cache, results-cache and metadata-cache. To use Redis, deploy Redis instances, disable the built-in Memcached configuration flag in values.yaml of `mimir-distributed` Helm chart, and then configure Mimir to use Redis.

To disable Memcached, remove any `chunks-cache`, `index-cache`, `metadata-cache` and `results-cache` configuration from your Helm `values.yaml` file. Alternatively, explicitly disable each of the Memcached instances by setting `enabled` to `false`:
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