Hi All
We have a nicely functional NVMe cluster running – but in the process of expanding it we have encountered slow_ops
The drill was:
- Maintaince mode
- Ceph orch osd add
- Change weights to 1
- Disable maintaince mode.
Somethings goes wrong around 3 – where slowops begins to kick in – but restarting the OSD’s underneath can make it go away – tested twice.
In one situation the 2) step failed to bring up the OSD – causing the entire process to work 100% correctly. Thus changing weight from 7.68 to 1
In above process on live OSD seem to be the issue.
It is actually a flaw that we managed to get the entire cluster created with weight 1 instead of 7.68 in the first place thus:
- Can we bulk change weights on all existing OSD’s without huge data movement? If so – how?
- Can we ceph orch add – but with a specific initial weight?
Thanks.
Best regards,
Jesper Agerbo Krogh
Director Digitalization
Digitalization
Topsoe A/S
Haldor Topsøes Allé 1
2800 Kgs. Lyngby
Denmark
Phone (direct): 27773240
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