Hi everyone!
On the old prod cluster
- baremetal, 5 nodes (24 cpu, 256G RAM)
- ceph 0.80.9 filestore
- 105 osd, size 114TB (each osd 1.1T, SAS Seagate ST1200MM0018) , raw used 60%
- 15 journals (eash journal 0.4TB, Toshiba PX04SMB040)
- net 20Gbps
- 5 pools, size 2, min_size 1
we have discovered recently pretty high Average Apply latency, near 20 ms.
Using ceph osd perf I can see that sometimes osd's apply latency could be high as 300-400 ms on some disks. How I can tune ceph in order to reduce this latency?
ceph.conf:
https://pastebin.com/raw/MeF00YLG
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