Hi folks!
I have a Ceph production 17.2.6 cluster with 6 machines in it - four
newer, faster machines with 4x3.84TB NVME drives each, and two with
24x1.68TB SAS disks each.
I know I should have done something smart with the CRUSH maps for this
up front, but until now I have shied away from CRUSH maps as they sound
really complex.
Right now my cluster's performance, especially write performance, is not
what it needs to be, and I am looking for advice:
1. How should I be structuring my crush map, and why?
2. How does one actually edit and manage a CRUSH map? What /commands/
does one use? This isn't clear at all in the documentation. Are there
any GUI tools out there for managing CRUSH?
3. Is this going to impact production performance or availability while
I'm configuring it? I have tens of thousands of users relying on this
thing, so I can't take any risks.
Thanks in advance!
--
Regards,
Thorne Lawler - Senior System Administrator
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P +61 499 449 170
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