Hello on 2019/9/16 17:36, Eikermann, Robert wrote:
Should it be possible to do that on a running pool? I tried to do so and immediately all VMs (Linux Ubuntu OS) running on Ceph disks got readonly filesystems. No errors were shown in ceph (but also no traffic arrived after enabling the cache tier). Removing the cache tier , rebooting the VMs and doing a filesystemcheck repaired everything.
After enable cache tier, did you test to reboot a VM to make it become effective?
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