<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hi All,</div><div><br data-mce-bogus="1"></div><div>I have to create a test environment for testing purposes, because we need to testing our new 10gbe infrastructure.</div><div>One server that 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="1"></div><div>Its connected to each other throught a dlink 10gbe switch.</div><div><br></div><div>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. </div><div>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.</div><div><br data-mce-bogus="1"></div><div>So:</div><div><br data-mce-bogus="1"></div><div>- hdparm 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 from inside vm on local virtual disk - 93-102 Mb /sec</div><div><br data-mce-bogus="1"></div><div>The question is : Why?</div><div><br data-mce-bogus="1"></div><div>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.</div><div><br data-mce-bogus="1"></div><div>Thanks in advance,</div><div><br data-mce-bogus="1"></div><div>Regards, </div><div>Tibor<br></div><div data-marker="__SIG_PRE__"><p></p></div></div></body></html>