Hi Christoph, Am 12.11.2014 17:29, schrieb Christoph Adomeit: > Hi, > > i installed a Ceph Cluster with 50 OSDs on 4 Hosts and finally I am really > happy with it. > > Linux and Windows VMs run really fast in KVM on the Ceph Storage. > > Only my Solaris 10 guests are terribly slow on ceph rbd storage. A solaris on > Ceph Storage needs 15 Minutes to boot. When I move the Solaris Image to the > old nexenta nfs storage and start it on the same kvm host it will fly and > boot in 1,5 Minutes. > > I have tested ceph firefly and giant and the Problem is with both ceph > versions. > > The performance problem is not only with booting. The problem continues when > the server is up. EVerything is terribly slow. > > So the only difference here is ceph vs. nexenta nfs storage that causes the > big performance problems. > > The solaris guests have zfs root standard installation. > > Does anybody have an idea or a hint what might go on here and what I should > try to make solaris 10 Guests faster on ceph storage ?
zfs uses copy-on-write which i think is the reason why it is so slow on rbd. have you tried ufs? -- Mit freundlichen Grüßen, Florian Wiessner Smart Weblications GmbH Martinsberger Str. 1 D-95119 Naila fon.: +49 9282 9638 200 fax.: +49 9282 9638 205 24/7: +49 900 144 000 00 - 0,99 EUR/Min* http://www.smart-weblications.de -- Sitz der Gesellschaft: Naila Geschäftsführer: Florian Wiessner HRB-Nr.: HRB 3840 Amtsgericht Hof *aus dem dt. Festnetz, ggf. abweichende Preise aus dem Mobilfunknetz _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
