Hi,
Anyone having the following issues
We are randomly getting slow requests and rw locks error on the KVM volume. The slow requests eventually clear off and the cluster back to normal.
The errors hit multiple osd across all 4 nodes.
We have checked the following
1) Disk, all disks are ok
2) Network, all network link are ok, We test it with iperf3
3) CPU usages are low
4) RAM usages are ok.
Ubuntu 16.04 - Kernel 4.4.0-104-generic
Ceph version 12.2.1 using Bluestore
4 nodes with 12 osd. Total of 48 osd (1 disk per osd, disk size 6TB)
Total raw usage 28%
We have restarted those osd that has error, however we are still getting it.
Any idea to debug it. Before we plan to upgrade to the latest release 12.2.5, we want to find out what was causing it. It had been running fine for past 6 months.
Thanks
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