There is potential for locking due to hung processes or such when you have OSDs on Mons. My test cluster has OSDS on Mons and it hasn't come across it, but I have heard of this happening in this mailing list. I don't think you would ever hear a recommendation for this in a production environment. ________________________________________ From: ceph-users [ceph-users-bounces@xxxxxxxxxxxxxx] on behalf of Dacre, Alex [Alex.Dacre@xxxxxxxxxx] Sent: Friday, May 06, 2016 5:07 AM To: Oliver Dzombic; ceph-users@xxxxxxxxxxxxxx Subject: Re: Dual Role Nodes That's good to know. My plan is to have three nodes initially; each with every role. Thanks, Alex -----Original Message----- From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Oliver Dzombic Sent: 06 May 2016 12:06 To: ceph-users@xxxxxxxxxxxxxx Subject: Re: Dual Role Nodes Hi Alex, thats no problem. It might get harder to troubleshoot problems, because the serverressourced will be used for everything. Also you will have on the same node logs for every different service. But in general, its no problem technically to have all ( Mon+Osd+MDS ) on one node. -- Mit freundlichen Gruessen / Best regards Oliver Dzombic IP-Interactive mailto:info@xxxxxxxxxxxxxxxxx Anschrift: IP Interactive UG ( haftungsbeschraenkt ) Zum Sonnenberg 1-3 63571 Gelnhausen HRB 93402 beim Amtsgericht Hanau Geschäftsführung: Oliver Dzombic Steuer Nr.: 35 236 3622 1 UST ID: DE274086107 Am 06.05.2016 um 13:00 schrieb Dacre, Alex: > Hi, > > > > I'm looking at standing up a small Ceph cluster, but I'm curious as to > what the general opinion is around having dual role nodes. E.g. each > node is both an OSD and MON. > > > > Regards, > > Alex > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ceph.com_lis > tinfo.cgi_ceph-2Dusers-2Dceph.com&d=DQIF-g&c=O3LcjD-V2Iepl5V0N1424A&r= > MW8D_KLIjbkgPV4I3ExMPW-6rQA8xlUsAXjzeSmCE80&m=Zrz-dViIT_3QUcQUXdQGZEsH > av9rT228pj_fFI0a8oQ&s=NZ4hiYs315UX7MIGhTyabHpGqrFXEju-WBZjIVFeGUU&e= > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ceph.com_listinfo.cgi_ceph-2Dusers-2Dceph.com&d=DQIF-g&c=O3LcjD-V2Iepl5V0N1424A&r=MW8D_KLIjbkgPV4I3ExMPW-6rQA8xlUsAXjzeSmCE80&m=Zrz-dViIT_3QUcQUXdQGZEsHav9rT228pj_fFI0a8oQ&s=NZ4hiYs315UX7MIGhTyabHpGqrFXEju-WBZjIVFeGUU&e= _______________________________________________ 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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