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update redis-cache documentation (#6109) 

* update redis-cache documentation

added clarifying info on setup and enablement

* added link
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pdeva 2018-08-09 13:44:59 -07:00 committed by Gian Merlino
parent aa660b8751
commit c028d18d74
1 changed files with 8 additions and 3 deletions
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11
docs/content/development/extensions-contrib/redis-cache.md
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@ -8,9 +8,14 @@ Druid Redis Cache
A cache implementation for Druid based on [Redis](https://github.com/antirez/redis).
# Configuration
Below are the configuration options known to this module:
Below are the configuration options known to this module.
|`runtime.properties`|Description|Default|Required|
Note that just adding these properties does not enable the cache. You still need to add the `druid.<nodetype>.cache.useCache` and `druid.<nodetype>.cache.populateCache` properties for the nodes you want to enable the cache on as described in the [cache configuration docs](../../configuration/caching.html).
A possible configuration would be to keep the properties below in your `common.runtime.properties` file (present on all nodes) and then add `druid.<nodetype>.cache.useCache` and `druid.<nodetype>.cache.populateCache` in the `runtime.properties` file of the node types you want to enable caching on.
|`common.runtime.properties`|Description|Default|Required|
|--------------------|-----------|-------|--------|
|`druid.cache.host`|Redis server host|None|yes|
|`druid.cache.port`|Redis server port|None|yes|
@ -29,4 +34,4 @@ In addition to the normal cache metrics, the redis cache implementation also rep
|Metric|Description|Normal value|
|------|-----------|------------|
|`query/cache/redis/*/requests`|Count of requests to redis cache|whatever request to redis will increase request count by 1|
|`query/cache/redis/*/requests`|Count of requests to redis cache|whatever request to redis will increase request count by 1|