Hi All,

=3D

I have to create a test environment for testing purposes, becaus= =3D e we need to testing our new 10gbe infrastructure.

One server tha= =3D t have a 10gbe nic - this is the vdsm host and ovirt portal.

One = =3D server that have a 10gbe nic - this is the storage.

Its connected to each other throught a dlink 10gbe= s=3D witch.

Everything good and nice, the server can co= =3D nnect to storage, I can make and run VMs, but the storage performance from = =3D inside VM seems to be 1Gb/sec only.

I did try the iperf com= =3D mand for testing connections beetwen servers, and it was 9.40 GB/sec. I hav= =3D e try to use hdparm -tT /dev/mapper/iscsidevice and also it was 400-450 MB/= =3D sec. I've got same result on storage server.

So:

- h= dpar=3D m test on local storage ~ 400 mb/sec

- hdparm test on ovirt node = =3D server through attached iscsi device ~ 400 Mb/sec

- hdparm test f= =3D rom 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 o= th=3D er networks. The router is only 1gbe/sec, but i've tested and the traffic d= =3D oes not going through this.

=3D

Thanks in advance,

Reg= ar=3D ds,

Tibor

=3D

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