Hi, I'm actually doing this on a pretty much similar system. I'm using ovirt with KVM, RAIDZ on 4 disks with LZ4 and also dedup. My brick -nodes are also ovirt-Nodes (VM-Hosts), and have 32/48 GB RAM. ZFS may use up to 18GB of it, so a little more than your setup. ovirt needs rep=3, i have 3 bricks per node. I have no complaints about speed, ovirt is using thin provisioned vm -disks as one big file per disk, self heal operations do need their time but with little impact as far as i have seen. Performance is all about network speed i would say. Running VMs directly on the bricks may improve your VMs by using L2ARC... Frank Am Mittwoch, den 30.09.2015, 15:00 +1000 schrieb Lindsay Mathieson: > I'm revisiting Gluster for the purpose of hosting Virtual Machine > images (KVM). I was considering the following configuration > > 2 Nodes > - 1 Brick per node (replication = 2) > - 2 * 1GB Eth, LACP Bonded > - Bricks hosted on ZFS > - VM Images accessed via Block driver (gfapi) > > ZFS Config: > - Raid 10 > - SSD SLOG and L2ARC > - 4 GB RAM > - Compression (lz4) > > Does that seem like an sane layout? > > Question: With the gfapi driver, does the vm image appear as a file > on the host (zfs) file system? > > > Background: I currently have our VM's hosted on Ceph using a similar > config as above, minus zfs. I've found that the performance for such > a small setup is terrible, the maintenance headache is high and when > a drive drops out, the performance gets *really* bad. Last time I > checked, gluster was much slower at healing large files than ceph, > I'm hoping that has improved :) > > _______________________________________________ > Gluster-users mailing list > Gluster-users@xxxxxxxxxxx > http://www.gluster.org/mailman/listinfo/gluster-users ______________________________________________________________________________ BODDEN-KLINIKEN Ribnitz-Damgarten GmbH Sandhufe 2 18311 Ribnitz-Damgarten Telefon: 03821-700-0 Fax: 03821-700-240 E-Mail: info@xxxxxxxxxxxxxxxxxx Internet: http://www.bodden-kliniken.de Sitz: Ribnitz-Damgarten, Amtsgericht: Stralsund, HRB 2919, Steuer-Nr.: 081/126/00028 Aufsichtsratsvorsitzende: Carmen Schröter, Geschäftsführer: Dr. Falko Milski Der Inhalt dieser E-Mail ist ausschließlich für den bezeichneten Adressaten bestimmt. Wenn Sie nicht der vorge- sehene Adressat dieser E-Mail oder dessen Vertreter sein sollten, beachten Sie bitte, dass jede Form der Veröf- fentlichung, Vervielfältigung oder Weitergabe des Inhalts dieser E-Mail unzulässig ist. Wir bitten Sie, sofort den Absender zu informieren und die E-Mail zu löschen. Bodden-Kliniken Ribnitz-Damgarten GmbH 2014 *** Virenfrei durch Kerio Mail Server und Sophos Antivirus *** _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users
