BTW, I'd like to know, after I change the "from rack" to "from host", if I add more racks with host/osds in the cluster, will ceph choose the osds for pg only from one zone? or ceph will randomly choose from several different zones?
Wei Cao (Buddy) -----Original Message----- From: Cao, Buddy Sent: Wednesday, May 14, 2014 1:30 PM To: 'Gregory Farnum' Cc: ceph-users@lists.ceph.com Subject: RE: [ceph-users] crushmap question Thanks Gregory so much，it solved the problem! Wei Cao (Buddy) -----Original Message----- From: Gregory Farnum [mailto:g...@inktank.com] Sent: Wednesday, May 14, 2014 2:00 AM To: Cao, Buddy Cc: ceph-users@lists.ceph.com Subject: Re: [ceph-users] crushmap question You just use a type other than "rack" in your chooseleaf rule. In your case, "host". When using chooseleaf, the bucket type you specify is the failure domain which it must segregate across. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com On Tue, May 13, 2014 at 12:52 AM, Cao, Buddy <buddy....@intel.com> wrote: > Hi, > > > > I have a crushmap structure likes root->rack->host->osds. I designed > the rule below, since I used “chooseleaf…rack” in rule definition, if > there is only one rack in the cluster, the ceph gps will always stay > at stuck unclean state (that is because the default metadata/data/rbd pool > set 2 replicas). > Could you let me know how do I configure the rule to let it can also > work in a cluster with only one rack? > > > > rule ssd{ > > ruleset 1 > > type replicated > > min_size 0 > > max_size 10 > > step take root > > step chooseleaf firstn 0 type rack > > step emit > > } > > > > BTW, if I add a new rack into the crushmap, the pg status will finally > get to active+clean. However, my customer do ONLY have one rack in > their env, so hard for me to have workaround to ask him setup several racks. > > > > Wei Cao (Buddy) > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
