On Tue, Mar 1, 2016 at 7:28 PM, Dietmar Rieder <dietmar.rieder@xxxxxxxxxxx> wrote: > Dear ceph users, > > > I'm in the very initial phase of planning a ceph cluster an have a > question regarding the RAM recommendation for an MDS. > > According to the ceph docs the minimum amount of RAM should be "1 GB > minimum per daemon". Is this per OSD in the cluster or per MDS in the > cluster? > > I plan to run 3 ceph-mon on 3 dedicated machines and would like to run 3 > ceph-msd on these machines as well. The raw capacity of the cluster > should be ~1.9PB. Would 64GB of RAM then be enough for the > ceph-mon/ceph-msd nodes? > Each file inode in MDS uses about 2k memory (It's not relevant to file size). MDS memory usage depends on how large active file set are. Regards Yan, Zheng > Thanks > Dietmar > > -- > _________________________________________ > D i e t m a r R i e d e r > > > _______________________________________________ > 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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