On Wed, 22 Feb 2017 06:21:41 +0000 Mustafa AKIN wrote: > Hi, I’m fairly new to Ceph. We are building a shared system on top of Ceph. I > know that OpenStack uses a few pools and handles the ownership itself. But > would it be undesirable to create a pool for a user in Ceph? It would lead to > having too many Placement Groups, is there any bad affect of it?
As discussed/mentioned here many times before, PGs are not free. They consume RAM and most of all CPU, especially when tiering (when OSDs get added or removed/fail). So ideally you want to limit yourself to what the formulas and PGcalc recommend for your cluster size. And that's obviously not a number that will scale up with the amount of users. Christian -- Christian Balzer Network/Systems Engineer ch...@gol.com Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
