Hello David, Thanks a lot for detailed information!
This is going to help me. Regards Gaurav Goyal On Tue, Aug 2, 2016 at 11:46 AM, David Turner <david.tur...@storagecraft.com > wrote: > I'm going to assume you know how to add and remove storage > http://docs.ceph.com/docs/hammer/rados/operations/add-or-rm-osds/. The > only other part of this process is reweighting the crush map for the old > osds to a new weight of 0.0 > http://docs.ceph.com/docs/master/rados/operations/crush-map/. > > I would recommend setting the nobackfill and norecover flags. > > ceph osd set nobackfill > ceph osd set norecover > > Next you would add all of the new osds according to the ceph docs and then > reweight the old osds to 0.0. > > ceph osd crush reweight osd.1 0.0 > > Once you have all of that set, unset nobackfill and norecover. > > ceph osd unset nobackfill > ceph osd unset norecover > > Wait until all of the backfilling finishes and then remove the old SAN > osds as per the ceph docs. > > > There is a thread from this mailing list about the benefits of weighting > osds to 0.0 instead of just removing them. The best thing that you gain > from doing it this way is that you can remove multiple nodes/osds at the > same time without having degraded objects and especially without losing > objects. > > ------------------------------ > > <https://storagecraft.com> David Turner | Cloud Operations Engineer | > StorageCraft > Technology Corporation <https://storagecraft.com> > 380 Data Drive Suite 300 | Draper | Utah | 84020 > Office: 801.871.2760 | Mobile: 385.224.2943 > > ------------------------------ > > If you are not the intended recipient of this message or received it > erroneously, please notify the sender and delete it, together with any > attachments, and be advised that any dissemination or copying of this > message is prohibited. > > ------------------------------ > >
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