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.
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