Dramatic performance drop at certain number of objects in pool

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi All,

I have a repeatable condition when the object count in a pool gets to
320-330 million the object write time dramatically and almost
instantly increases as much as 10X, exhibited by fs_apply_latency
going from 10ms to 100s of ms.

Can someone point me in a direction / have an explanation ?

I can add a new pool and it performs normally.

Config is generally
3 Nodes 24 physical core each, 768GB Ram each, 16 OSD / node , all SSD
with NVME for journals. Centos 7.2, XFS

Jewell is the release; inserting objects with librados via some Python
test code.

Best Regards
Wade
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [CEPH Users]     [Ceph Large]     [Information on CEPH]     [Linux BTRFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux