It appears most people have fixed the issue by switching from btrfs to xfs for the cache drive.
Using iotop I can still (after switching to xfs recently) see about 1mb/min writes to cache on an idle server. Thats close to 1.5Gb per day without doing anything.
Unraid OS version 6.9.0-beta22 available
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in Prereleases
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Since we got your attention on this issue, here's two recent reddit threads discussing the issue:
Unraid is unusable for me because of the docker excessive writes bug destroying my cache ssd. Is nobody bothered by this?
Btrfs and cache writes...a question for those who switched.
It appears most people have fixed the issue by switching from btrfs to xfs for the cache drive.
Using iotop I can still (after switching to xfs recently) see about 1mb/min writes to cache on an idle server. Thats close to 1.5Gb per day without doing anything.