Persistent and ephemeral node storage

Configure paths for persistent storage and ephemeral storage.

For each node in the cluster, you can configure paths for both persistent storage and ephemeral storage.

The persistent storage and ephemeral storage discussed in this document are not related to Redis persistence or AWS ephemeral drives.

Persistent storage

Persistent storage is mandatory. The cluster uses persistent storage to store information that needs to persist even if a shard or a node fails, such as server logs, configurations, and files.

For example, if you configure persistence for a database, then the persistence information is stored in this location.

The persistent volume must be a storage area network (SAN) using an EXT4 or XFS file system and be connected as an external storage volume.

When using append-only file (AOF) persistence, use flash-based storage for the persistent volume.

Ephemeral storage

Ephemeral storage is optional. If configured, temporary information that does not need to be persisted is stored by the cluster in the ephemeral storage. This improves performance and helps reduce the load on the persistent storage.

Ephemeral storage must be a locally attached volume on each node.

Disk size requirements

For disk size requirements, see:

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