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Volume Pinning

Volume pinning allows you to keep active blocks of a volume in the cache, as well as writing them to disk. This provides a 100% cache hit rate for specific volumes (for example, volumes dedicated to critical applications), and delivers the response times of an all-flash storage system.

A volume is "pinned" when the entire active volume is placed in cache; associated snapshot (inactive) blocks are not pinned. All incoming data after that point is pinned. The number of volumes that can be pinned is limited by the size of the volumes and amount of available cache. However, only one volume in a volume family (a volume and the associated snapshots and clones) can be pinned.

Note: Pinning a volume may affect the cache hit rate of other volumes. It is a best practice to avoid unnecessary cache pinning.