| Hi Ravi and colleagues
(apologies for hijacking this thread but I’m not sure where else to report this (and it is related).)
With gluster 3.7.10, running #gluster volume set <volname> group virt fails with: volume set: failed: option : eager-lock does not exist Did you mean eager-lock?
I had to remove the eager-lock setting from /var/lib/glusterd/groups/virt to get this to work. It seems like setting eager-lock has been removed from latest gluster. Is this correct? Either way, is there anything else I should do?
Cheers,
Roderick
Hi Bill,
Can you enable virt-profile setting for your volume and see if
that helps? You need to enable this optimization when you create
the volume using ovrit, or use the following command for an
existing volume:
#gluster volume set <volname> group virt
-Ravi
On 02/12/2016 05:22 AM, Bill James wrote:
My apologies, I'm showing how much of a noob I am.
Ignore last direct to gluster numbers, as that wasn't really
glusterfs.
[root@ovirt2 test ~]# mount -t glusterfs
ovirt2-ks.test.j2noc.com:/gv1 /mnt/tmp/
[root@ovirt2 test ~]# time dd if=/dev/zero of=/mnt/tmp/testfile2
bs=1M count=1000 oflag=direct
1048576000 bytes (1.0 GB) copied, 65.8596 s, 15.9 MB/s
That's more how I expected, it is pointing to glusterfs
performance.
On 02/11/2016 03:27 PM, Bill James
wrote:
don't know if it helps, but I ran a few more tests, all from the
same hardware node.
The VM:
[root@billjov1 ~]# time dd if=/dev/zero of=/root/testfile bs=1M
count=1000 oflag=direct
1048576000 bytes (1.0 GB) copied, 62.5535 s, 16.8 MB/s
Writing directly to gluster volume:
[root@ovirt2 test ~]# time dd if=/dev/zero
of=/gluster-store/brick1/gv1/testfile bs=1M count=1000
oflag=direct
1048576000 bytes (1.0 GB) copied, 9.92048 s, 106 MB/s
Writing to NFS volume:
[root@ovirt2 test ~]# time dd if=/dev/zero
of=/mnt/storage/qa/testfile bs=1M count=1000 oflag=direct
1048576000 bytes (1.0 GB) copied, 10.5776 s, 99.1 MB/s
NFS & Gluster are using the same interface. Tests were not
run at same time.
This would suggest my problem isn't glusterfs, but the VM
performance.
On 02/11/2016 03:13 PM, Bill James
wrote:
xml
attached.
On 02/11/2016 12:28 PM, Nir Soffer wrote:
On Thu, Feb 11, 2016 at 8:27 PM, Bill
James <bill.james@xxxxxx>
wrote:
thank you for the reply.
We setup gluster using the names associated with NIC 2
IP.
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
That's NIC 2's IP.
Using 'iftop -i eno2 -L 5 -t' :
dd if=/dev/zero of=/root/testfile bs=1M count=1000
oflag=direct
1048576000 bytes (1.0 GB) copied, 68.0714 s, 15.4 MB/s
Can you share the xml of this vm? You can find it in vdsm
log,
at the time you start the vm.
Or you can do (on the host):
# virsh
virsh # list
(username: vdsm@ovirt password: shibboleth)
virsh # dumpxml vm-id
Peak rate
(sent/received/total): 281Mb 5.36Mb
282Mb
Cumulative (sent/received/total):
1.96GB 14.6MB
1.97GB
gluster volume info gv1:
Options Reconfigured:
performance.write-behind-window-size: 4MB
performance.readdir-ahead: on
performance.cache-size: 1GB
performance.write-behind: off
performance.write-behind: off didn't help.
Neither did any other changes I've tried.
There is no VM traffic on this VM right now except my
test.
On 02/10/2016 11:55 PM, Nir Soffer wrote:
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 (1GbE)
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.
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