3:26 p.m.
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Hi All,
I have to create a test environment for testing purposes, because we need to testing our
new 10gbe infrastructure.
One server that have a 10gbe nic - this is the vdsm host and ovirt portal.
One server that have a 10gbe nic - this is the storage.
Its connected to each other throught a dlink 10gbe switch.
Everything good and nice, the server can connect to storage, I can make and run VMs, but
the storage performance from inside VM seems to be 1Gb/sec only.
I did try the iperf command for testing connections beetwen servers, and it was 9.40
GB/sec. I have try to use hdparm -tT /dev/mapper/iscsidevice and also it was 400-450
MB/sec. I've got same result on storage server.
So:
- hdparm test on local storage ~ 400 mb/sec
- hdparm test on ovirt node server through attached iscsi device ~ 400 Mb/sec
- hdparm test from inside vm on local virtual disk - 93-102 Mb /sec
The question is : Why?
ps. I Have only one ovirtmgmt device, so there are no other networks. The router is only
1gbe/sec, but i've tested and the traffic does not going through this.
Thanks in advance,
Regards,
Tibor
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<html><body><div style=3D"font-family: arial, helvetica, sans-serif;
font-s=
ize: 12pt; color: #000000"><div>Hi All,</div><div><br
data-mce-bogus=3D"1">=
</div><div>I have to create a test environment for testing purposes, becaus=
e we need to testing our new 10gbe infrastructure.</div><div>One server tha=
t have a 10gbe nic - this is the vdsm host and ovirt portal.</div><div>One =
server that have a 10gbe nic - this is the storage.</div><div><br
data-mce-=
bogus=3D"1"></div><div>Its connected to each other throught a
dlink 10gbe s=
witch.</div><div><br></div><div>Everything good and nice,
the server can co=
nnect to storage, I can make and run VMs, but the storage performance from =
inside VM seems to be 1Gb/sec only. </div><div>I did try the iperf
com=
mand for testing connections beetwen servers, and it was 9.40 GB/sec. I hav=
e try to use hdparm -tT /dev/mapper/iscsidevice and also it was 400-450 MB/=
sec. I've got same result on storage server.</div><div><br
data-mce-bogus=
=3D"1"></div><div>So:</div><div><br
data-mce-bogus=3D"1"></div><div>- hdpar=
m test on local storage ~ 400 mb/sec</div><div>- hdparm test on ovirt node =
server through attached iscsi device ~ 400 Mb/sec</div><div>- hdparm test f=
rom inside vm on local virtual disk - 93-102 Mb /sec</div><div><br
data-mce=
-bogus=3D"1"></div><div>The question is :
Why?</div><div><br data-mce-bogus=
=3D"1"></div><div>ps. I Have only one ovirtmgmt device, so there
are no oth=
er networks. The router is only 1gbe/sec, but i've tested and the traffic d=
oes not going through this.</div><div><br
data-mce-bogus=3D"1"></div>=
<div>Thanks in advance,</div><div><br
data-mce-bogus=3D"1"></div><div>Regar=
ds, </div><div>Tibor<br></div><div
data-marker=3D"__SIG_PRE__"><p></p>=
</div></div></body></html>
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