Hi,
Having been slightly caught out by tunables on my Octopus upgrade[0],
can I just check that if I do
ceph osd crush tunables optimal
That will update the tunables on the cluster to the current "optimal"
values (and move a lot of data around), but that this doesn't mean
they'll change next time I upgrade the cluster or anything like that?
It's not quite clear from the documentation whether the next time
"optimal" tunables change that'll be applied to a cluster where I've set
tunables thus, or if tunables are only ever changed by a fresh
invocation of ceph osd crush tunables...
[I assume the same answer applies to "default"?]
Regards,
Matthew
[0] I foolishly thought a cluster initially installed as Jewel would
have jewel tunables
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