On Thu, Feb 11, 2016 at 2:42 AM, Ravishankar N <ravishankar@xxxxxxxxxx> wrote: > +gluster-users > > Does disabling 'performance.write-behind' give a better throughput? > > > > On 02/10/2016 11:06 PM, Bill James wrote: >> >> 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 How do you ensure that gluster trafic is using this nic? >> NIC3 = VM traffic How do you ensure that vm trafic is using this nic? >> I tried with default glusterfs settings And did you find any difference? >> 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 block size of 1G?! Try 1M (our default for storage operations) >> 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? Adding Niels for advice. >> 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. Please avoid this, this is a public mailing list, everything you write here is public. Nir _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users
