I don't known if it's related, but "[Performance] Improvement on DB Performance" http://www.spinics.net/lists/ceph-devel/msg19062.html
they are a patch here: https://github.com/ceph/ceph/pull/1848 already pushed in master ----- Mail original ----- De: "Robert van Leeuwen" <robert.vanleeu...@spilgames.com> À: ceph-users@lists.ceph.com Envoyé: Mardi 24 Juin 2014 08:15:02 Objet: Re: [ceph-users] Poor performance on all SSD cluster > All of which means that Mysql performance (looking at you binlog) may > still suffer due to lots of small block size sync writes. Which begs the question: Anyone running a reasonable busy Mysql server on Ceph backed storage? We tried and it did not perform good enough. We have a small ceph cluster: 3 machines with 2 SSD journals and 10 spinning disks each. Using ceph trough kvm rbd we were seeing performance equal to about 1-2 spinning disks. Reading this thread it now looks a bit if there are inherent architecture + latency issues that would prevent it from performing great as a Mysql database store. I'd be interested in example setups where people are running busy databases on Ceph backed volumes. Cheers, Robert _______________________________________________ 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
