Storage Engine - Redis

Manage the storage engine

Auto Tiering supports two storage engines:

Speedb: Redis proprietary storage engine. The default and recommended storage engine as of Redis Software version 7.2.4.
RocksDB: Used up to Redis version 6.2. Deprecated for later Redis versions.

Redis Flex supports Speedb only.

{{<warning>}}Switching between storage engines requires guidance by Redis Support or your Account Manager.{{</warning>}}

Change the storage engine

Change the cluster level configuration for default storage engine.

API:

curl -k -u <username>:<password> -X PUT -H "Content-Type: application/json" -d '{"bigstore_driver":"speedb"}' https://localhost:9443/v1/cluster

CLI:

rladmin cluster config bigstore_driver {speedb | rocksdb}

Restart the each database on the cluster one by one.
sh
```
rladmin restart db { db:<id> | <name> }
```

{{<note>}} We recommend restarting your database at times with low usage and avoiding peak hours. For databases without persistence enabled, we also recommend using export to backup your database first.{{</note>}}

Monitor the storage engine

To get the current cluster level default storage engine run:

Use the rladmin info cluster command look for ‘bigstore_driver’.

Use the REST API:

curl -k -u <username>:<password> -X GET -H "Content-Type: application/json" https://localhost:9443/v1/cluster

Versions of Redis Software 7.2 and later provide a metric called bdb_bigstore_shard_count to help track the shard count per database, filtered by bdb_id and by storage engine as shown below:

bdb_bigstore_shard_count{bdb="1",cluster="mycluster.local",driver="rocksdb"} 1.0
bdb_bigstore_shard_count{bdb="1",cluster="mycluster.local",driver="speedb"} 2.0

For more about metrics for Redis Software’s integration with Prometheus, see [Prometheus integration]({{< relref "/integrate/prometheus-with-redis-enterprise/prometheus-metrics-definitions" >}}).