[ovirt-users] ovirt glusterfs performance

I'm setting up a ovirt cluster using glusterfs and noticing not stellar performance. Maybe my setup could use some adjustments? 3 hardware nodes running centos7.2, glusterfs 3.7.6.1, ovirt 3.6.2.6-1. Each node has 8 spindles configured in 1 array which is split using LVM with one logical volume for system and one for gluster. They each have 4 NICs, NIC1 = ovirtmgmt NIC2 = gluster NIC3 = VM traffic I tried with default glusterfs settings and also with: performance.cache-size: 1GB performance.readdir-ahead: on performance.write-behind-window-size: 4MB [root@ovirt3 test scripts]# gluster volume info gv1 Volume Name: gv1 Type: Replicate Volume ID: 71afc35b-09d7-4384-ab22-57d032a0f1a2 Status: Started Number of Bricks: 1 x 3 = 3 Transport-type: tcp Bricks: Brick1: ovirt1-ks.test.j2noc.com:/gluster-store/brick1/gv1 Brick2: ovirt2-ks.test.j2noc.com:/gluster-store/brick1/gv1 Brick3: ovirt3-ks.test.j2noc.com:/gluster-store/brick1/gv1 Options Reconfigured: performance.cache-size: 1GB performance.readdir-ahead: on performance.write-behind-window-size: 4MB Using simple dd test on VM in ovirt: dd if=/dev/zero of=/root/testfile bs=1G count=1 oflag=direct 1073741824 bytes (1.1 GB) copied, 65.9337 s, 16.3 MB/s Another VM not in ovirt using nfs: dd if=/dev/zero of=/root/testfile bs=1G count=1 oflag=direct 1073741824 bytes (1.1 GB) copied, 27.0079 s, 39.8 MB/s Is that expected or is there a better way to set it up to get better performance? Thanks. Cloud Services for Business www.j2.com j2 | eFax | eVoice | FuseMail | Campaigner | KeepItSafe | Onebox This email, its contents and attachments contain information from j2 Global, Inc. and/or its affiliates which may be privileged, confidential or otherwise protected from disclosure. The information is intended to be for the addressee(s) only. If you are not an addressee, any disclosure, copy, distribution, or use of the contents of this message is prohibited. If you have received this email in error please notify the sender by reply e-mail and delete the original message and any copies. (c) 2015 j2 Global, Inc. All rights reserved. eFax, eVoice, Campaigner, FuseMail, KeepItSafe, and Onebox are registered trademarks of j2 Global, Inc. and its affiliates.