Same happened to us two weeks ago using nautilus, although we added the rules and storage classes. ----- Am 14. Sep 2020 um 16:02 schrieb Marc Roos M.Roos@xxxxxxxxxxxxxxxxx: > I did the same, 1 or 2 years ago, creating a replicated_ruleset_hdd and > replicated_ruleset_ssd. Eventhough I did not have any ssd's on any of > the nodes at that time, adding this hdd type criteria made pg's migrate. > I thought it was strange that this happens on a hdd only cluster, so I > mentioned it here. I am not sure however if this is still an issue, but > better take this into account. > > > > > > -----Original Message----- > To: ceph-users@xxxxxxx > Subject: New pool with SSD OSDs > > Hello! > > We have a Ceph cluster with 30 HDD 4 TB in 6 hosts, only for RBD. > > Now, we're receiving other 6 servers with 6 SSD 2 TB each and we want to > create a separate pool for RBD on SSD, and let unused and backup volumes > stays in HDD. > > > I have some questions: > > > As I am only using "replicated_rule". ¿If I add an SSD OSD to the > cluster, Ceph starts to migrate PGs to it? > > If so, to prevent this, first I have to create rule like > > # ceph osd crush rule create-replicated pool-hdd default host hdd > > and then > > #ceph osd pool set rbd crush_rule pool-hdd > > ? > > > Or, if Ceph does not mix automatically hdd and ssd, I create the SSD OSD > and then > > # ceph osd crush rule create-replicated pool-ssd default host ssd > > # ceph osd pool create pool-ssd 256 256 ssdpool > > ? > > And then migrate images from one to another pool as needed. > > > Any thoughts are wellcome! > > Thanks in advanced for your time. > > > Javier.- > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx -- Dipl.-Inf. André Gemünd, Leiter IT / Head of IT Fraunhofer-Institute for Algorithms and Scientific Computing andre.gemuend@xxxxxxxxxxxxxxxxxx Tel: +49 2241 14-2193 /C=DE/O=Fraunhofer/OU=SCAI/OU=People/CN=Andre Gemuend _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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