[PVE-User] dm-cache & VM's

[Lindsay Mathieson]

Testing glusterfs again :) and trying to improve performance. I setup dm-cache 
with a 60GB sdd partition on both nodes, write-back enabled.

Testing performance inside a VM (only vm on node) using Crystal Disk Mark - 
sustained and random reads got a huge boosts, but writes were only improved by 
a few percent, which was surprising.

Might it be because the VM image is to large for the cache?

-- 
Lindsay
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