Dell Storage with Microsoft Storage Spaces Best Practices Guide

CSV cache allows you to allocate RAM on the storage node as a write-through cache. If you are using Storage Spaces with storage tiers, the CSV cache is not used and is not configured.

If you have VDs that are not using storage tiers or you are using VDs with parity resiliency, then Dell recommends that you enable CSV cache.

For optimal performance, the recommendation is to allocate 50 percent of the storage node memory for the CSV cache.

Run the following PowerShell command to set the CSV cache size.

(Get-Cluster).BlockCacheSize = <sizeInMB>

For example,

Using a 4x4 configuration with four Dell PowerEdge R630 as the storage nodes. Each storage node has 128 GB of RAM. CSV cache should be set to 64 GB.

(Get-Cluster).BlockCacheSize = 65536