On 06/21/2018 03:35 PM, Drew Weaver wrote: > Yes, > > > > Eventually however you would probably want to replace that physical disk > that has died and sometimes with remote deployments it is nice to not > have to do that instantly which is how enterprise arrays and support > contracts have worked for decades. > > There is no point in doing that with Ceph. You just provision those disks as OSDs and make sure you don't fill up your cluster to a certain level. If you want you can even set the triggers lower then X percent. If a disks dies you don't have to take any action. Ceph rebalances and we are back to HEALTH_OK. Now you can replace that dead disk when ever you like. I manage a few clusters with >1000 disks and they have disks dying weekly. Once every X weeks somebody goes to the datacenter and swaps the broken disks. In the mean time we run happily without those disks. Wido > > I understand your point from a purely technological standpoint but I was > approaching it from more of a logistical standpoint. > > > > I suppose just leaving a disk in the system that isn’t being used would > be good enough as well. > > > > Thanks. > > -Drew > > > > > > *From:* Paul Emmerich [mailto:paul.emmerich@xxxxxxxx] > *Sent:* Thursday, June 21, 2018 9:16 AM > *To:* Drew Weaver <drew.weaver@xxxxxxxxxx> > *Cc:* ceph-users <ceph-users@xxxxxxxxxxxxxx> > *Subject:* Re: Designating an OSD as a spare > > > > Spare disks are bad design. There is no point in having a disk that is > not being used. > > Ceph will automatically remove a dead disk after 15 minutes from the > cluster, backfilling > > the data onto other disks. > > > > Paul > > > > 2018-06-21 14:54 GMT+02:00 Drew Weaver <drew.weaver@xxxxxxxxxx > <mailto:drew.weaver@xxxxxxxxxx>>: > > Does anyone know if it is possible to designate an OSD as a spare so > that if a disk dies in a host no administrative action needs to be > immediately taken to remedy the situation? > > > > Thanks, > > -Drew > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > -- > > Paul Emmerich > > Looking for help with your Ceph cluster? Contact us at https://croit.io > > croit GmbH > Freseniusstr. 31h > 81247 München > www.croit.io <http://www.croit.io> > Tel: +49 89 1896585 90 > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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