5:09 a.m.
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I have an ovirt 3.5 cluster set up with three el7 hosts. Storage is provid=
ed by two Fedora 20 machines and the connection is via multipath iscsi.=0AT=
he performance is quite good. The Fedora 20 iscsi targets are using the 't=
arget' (ie: lio) framework, which support the various t.10 scsi offloads. =
Vmware supports a subset of these called VAAI and Microsoft has a subset ca=
lled ODX.=0ACloning is one if the t.10 extensions that the lio target frame=
work supports.=0A=0AI just tried cloning a vm and noticed that during the p=
rocess there is a lof of traffic over the iscsi interfaces on the Storage P=
ool Manager host and the iscsi target machine.=0AWith proper support for t.=
10 cloning I shoudn't see any traffic on the isci links (or very minimal tr=
affic)=0A=0AIs there some way to enable the storage offload functionality i=
n Ovirt?=0AIf not, is this on the VDSM roadmap? If support were worked in =
this should be able to be applied to FCP connections as well. The lio targ=
et supports these offloads when acting as a Fiber Channel target also.=0A=
=0A=0AI've asked this sometime back but there hasn't been much in the way o=
f discussion on this users list or the devel list about this feature.
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<html><body><div style=3D"color:#000; background-color:#fff;
font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;fo=
nt-size:12px"><div>I have an ovirt 3.5 cluster set up with three el7
hosts.=
Storage is provided by two Fedora 20 machines and the connection is =
via multipath iscsi.</div><div>The performance is quite good. The
Fed=
ora 20 iscsi targets are using the 'target' (ie: lio) framework, which supp=
ort the various t.10 scsi offloads. Vmware supports a subset of these=
called VAAI and Microsoft has a subset called ODX.</div><div>Cloning is on=
e if the t.10 extensions that the lio target framework
supports.<br></div><=
div>I just tried cloning a vm and noticed that during the process there is =
a lof of traffic over the iscsi interfaces on the Storage Pool Manager host=
and the iscsi target machine.</div><div>With proper support for t.10 cloni=
ng I shoudn't see any traffic on the isci links (or very minimal
traffic)<br></div><div style=3D"color: rgb(0, 0, 0); font-size: 12px;
font=
-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-se=
rif; background-color: transparent; font-style: normal;">Is there some way =
to enable the storage offload functionality in Ovirt?</div><div
style=3D"co=
lor: rgb(0, 0, 0); font-size: 12px; font-family: HelveticaNeue,Helvetica Ne=
ue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent;=
font-style: normal;">If not, is this on the VDSM roadmap? If support=
were worked in this should be able to be applied to FCP connections as wel=
l. The lio target supports these offloads when acting as a Fiber Chan=
nel target also.<br></div><div style=3D"color: rgb(0, 0, 0);
font-size: 12p=
x; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,=
sans-serif; background-color: transparent; font-style:
normal;"><br></div><=
div style=3D"color: rgb(0, 0, 0); font-size: 12px; font-family:
HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; bac=
kground-color: transparent; font-style: normal;">I've asked this sometime b=
ack but there hasn't been much in the way of discussion on this users list =
or the devel list about this
feature.<br></div><div><br></div></div></body>=
</html>
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