On Thu, 30 Mar 2017, Vincent Godin wrote:
> When you replace a failed osd, it has to recover all of its pgs and so
> it is pretty busy. Is it possible to tell this OSD to not become
> primary for any of its already synchronized pgs till every pgs (of the
> OSD) have recovered ? It should accelerate the rebuild process because
> this OSD won't have to serve client's read requests but just sync the
> writes request from the OSDs owning the primary pgs and recover. Is
> there something wrong with this idea ?
This is a great idea, and it's on the list of things ceph-mgr should be
doing to balance load across the cluster. I've added a card for this
at
https://trello.com/b/ugTc2QFH/ceph-backlog
("mgr: primary-affinity away from busy osds").
sage
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