This is interesting. Kudos to you guys for getting the calculator up, I think this'll help some folks.
I have 1 pool, 40 OSDs, and replica of 3. I based my PG count on: http://ceph.com/docs/master/rados/operations/placement-groups/ ''' Less than 5 OSDs set pg_num to 128 Between 5 and 10 OSDs set pg_num to 512 Between 10 and 50 OSDs set pg_num to 4096 ''' But the calculator gives a different result of 2048. Out of curiosity, what sorts of issues might one encounter by having too many placement groups? I understand there's some resource overhead. I don't suppose it would manifest itself in a recognizable way? Bill ________________________________ From: ceph-users [[email protected]] on behalf of Michael J. Kidd [[email protected]] Sent: Wednesday, January 07, 2015 3:51 PM To: Loic Dachary Cc: [email protected] Subject: Re: [ceph-users] PG num calculator live on Ceph.com > Where is the source ? On the page.. :) It does link out to jquery and jquery-ui, but all the custom bits are embedded in the HTML. Glad it's helpful :) Michael J. Kidd Sr. Storage Consultant Inktank Professional Services - by Red Hat On Wed, Jan 7, 2015 at 3:46 PM, Loic Dachary <[email protected]<mailto:[email protected]>> wrote: On 07/01/2015 23:08, Michael J. Kidd wrote: > Hello all, > Just a quick heads up that we now have a PG calculator to help determine > the proper PG per pool numbers to achieve a target PG per OSD ratio. > > http://ceph.com/pgcalc > > Please check it out! Happy to answer any questions, and always welcome any > feedback on the tool / verbiage, etc... Great work ! That will be immensely useful :-) Where is the source ? Cheers > > As an aside, we're also working to update the documentation to reflect the > best practices. See Ceph.com tracker for this at: > http://tracker.ceph.com/issues/9867 > > Thanks! > Michael J. Kidd > Sr. Storage Consultant > Inktank Professional Services > - by Red Hat > > > _______________________________________________ > ceph-users mailing list > [email protected]<mailto:[email protected]> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Loïc Dachary, Artisan Logiciel Libre
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