Hi Pierre ? You can manipulate your CRUSH map to make use of ?chassis? in addition to the default ?host? type. I?ve done this with FatTwin and FatTwin^2 boxes with great success. For more reading take a look at: http://ceph.com/docs/master/rados/operations/crush-map/ In particular the ?Move a Bucket? section: http://ceph.com/docs/master/rados/operations/crush-map/#move-a-bucket ./JRH On Aug 18, 2014, at 2:57 PM, Pierre Jaury <pierre at jaury.eu> wrote: > Hello guys, > > I just acquired some brand new machines I would like to rely upon for a > storage cluster (and some virtualization). These machines are, however, > ? twin servers ?, ie. each blade (1U) comes with two different machines > but a single psu. > > I think two replicas would be enough for the intended purpose. Yet I > cannot guarantee that all replicas of a given object are stored on two > different blades. > > I basically have N blades, each blade has 2 distinct machines but a > single psu, each machine has 2 hard drives. Is it possible to configure > mutual exclusion between OSDs where replicas of a single object are stored? > > Regards > > -- > Pierre Jaury @ kaiyou > http://kaiyou.fr/contact.html > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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