Ceph random high latency

[ethaniel86]

same issue here. only two node OSDs under constant high latency out of 7 nodes. Other OSD most of the time latency 0.

 

[cikoshel]

check your vm hardware configuration. use virtio driver for network and storage.

 

[mokai77]

we solved our issue by enabling

bluestore_allocator = bitmap

this fixed a bug in the CEPH version used on proxmox, google for

ceph proxmox bitmap allocator

to find more info (im not allowed to post links here)

 

[mokai77]

to find out if you have the same bug, restart the osd's which have a high latency and observe if it starts with low latency again. if not your problem is somewhere else (HBA, disks, cable ...)