+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
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.
_______________________________________________
Users mailing list
Users@xxxxxxxxx
http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
http://www.gluster.org/mailman/listinfo/gluster-users
