2:37 p.m.
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Thanks Itamar.I heard the other day that NFS v4.2 is supposed to contain se=
rver side copy, so it's possible that we might see this kind of support in =
one of more storage domain available to ovirt at some stage perhaps next ye=
ar (in Fedora at least).Is this something that Gluster will also likely pro=
vide in a subsequent release once we have proper gfapi support?
I'd be interested to hear if others on the list are clamouring for server s=
ide offload support in some form.
From: Itamar Heim
To: Paul Jansen ; users=20
Sent: Saturday, 13 December 2014, 2:16
Subject: Re: [ovirt-users] storage offload capability
=20
On 11/13/2014 06:09 AM, Paul Jansen wrote:
I have an ovirt 3.5 cluster set up with three el7 hosts.=C2=A0
Storage is
provided by two Fedora 20 machines and the connection is via multipath
iscsi.
The performance is quite good.=C2=A0 The Fedora 20 iscsi targets are usin=
g
the 'target' (ie: lio) framework, which support the various
t.10 scsi
offloads.=C2=A0 Vmware supports a subset of these called VAAI and Microso=
ft
has a subset called ODX.
Cloning is one if the t.10 extensions that the lio target framework
supports.
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.
With proper support for t.10 cloning I shoudn't see any traffic on the
isci links (or very minimal traffic)
Is there some way to enable the storage offload functionality in Ovirt?
If not, is this on the VDSM roadmap?=C2=A0 If support were worked in this
should be able to be applied to FCP connections as well.=C2=A0 The lio ta=
rget
supports these offloads when acting as a Fiber Channel target also.
I've asked this sometime back but there hasn't been much in the way of
discussion on this users list or the devel list about this feature.
yes, on the roadmap, tbd yet on when. netapp did a plugin enabling this=20
for their storage array (VSC plugin)
I hope the ceph integration will provide this, though that doesn't solve=20
it for other type of storage domains yet.
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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 dir=3D"ltr"
id=3D"yui_3_16_0_1_1418643127992_2665">Thank=
s Itamar.</div><div id=3D"yui_3_16_0_1_1418643127992_2701"
dir=3D"ltr">I he=
ard the other day that NFS v4.2 is supposed to contain server side copy, so=
it's possible that we might see this kind of support in one of more storag=
e domain available to ovirt at some stage perhaps next year (in Fedora at l=
east).</div><div id=3D"yui_3_16_0_1_1418643127992_2700"
dir=3D"ltr">Is this=
something that Gluster will also likely provide in a subsequent release on=
ce we have proper gfapi support?</div><div
id=3D"yui_3_16_0_1_1418643127992=
_2892" dir=3D"ltr"><br></div><div
id=3D"yui_3_16_0_1_1418643127992_2901" di=
r=3D"ltr">I'd be interested to hear if others on the list are clamouring
fo=
r server side offload support in some form.<br></div><div
id=3D"yui_3_16_0_=
1_1418643127992_2699"><br> </div><div
id=3D"yui_3_16_0_1_1418643127992_260=
0" style=3D"font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, L=
ucida Grande, Sans-Serif; font-size: 12px;"> <div
id=3D"yui_3_16_0_1_141864=
3127992_2599" style=3D"font-family: HelveticaNeue, Helvetica Neue, Helvetic=
a, Arial, Lucida Grande, Sans-Serif; font-size: 12px;"> <div
id=3D"yui_3_16=
_0_1_1418643127992_2659" dir=3D"ltr"> <hr
id=3D"yui_3_16_0_1_1418643127992_=
2906" size=3D"1"> <font
id=3D"yui_3_16_0_1_1418643127992_2658" face=3D"Ari=
al" size=3D"2"> <b><span
style=3D"font-weight:bold;">From:</span></b> Itama=
r Heim<br> <b><span style=3D"font-weight:
bold;">To:</span></b> Paul Jansen=
; users <br> <b><span style=3D"font-weight:
bold;">Sent:</span></b> Saturd=
ay, 13 December 2014, 2:16<br> <b><span style=3D"font-weight:
bold;">Subjec=
t:</span></b> Re: [ovirt-users] storage offload capability<br>
</font> </di=
v> <div id=3D"yui_3_16_0_1_1418643127992_2598"
class=3D"y_msg_container"><b=
r>On 11/13/2014 06:09 AM, Paul Jansen wrote:<div
class=3D"qtdSeparateBR"><b=
r><br></div><div class=3D"yqt7039917945"
id=3D"yqtfd88356"><br clear=3D"non=
e">> I have an ovirt 3.5 cluster set up with three el7 hosts.
Stor=
age is<br clear=3D"none">> provided by two Fedora 20 machines and
the co=
nnection is via multipath<br clear=3D"none">> iscsi.<br
clear=3D"none">&=
gt; The performance is quite good. The Fedora 20 iscsi targets are us=
ing<br clear=3D"none">> the 'target' (ie: lio) framework,
which support =
the various t.10 scsi<br clear=3D"none">> offloads.
Vmware support=
s a subset of these called VAAI and Microsoft<br clear=3D"none">>
has a =
subset called ODX.<br clear=3D"none">> Cloning is one if the t.10
extens=
ions that the lio target framework<br clear=3D"none">>
supports.<br clea=
r=3D"none">> I just tried cloning a vm and noticed that during the
proce=
ss there is a<br clear=3D"none">> lof of traffic over the iscsi
interfac=
es on the Storage Pool Manager<br clear=3D"none">> host and the
iscsi ta=
rget machine.<br clear=3D"none">> With proper support for t.10
cloning I=
shoudn't see any traffic on the<br clear=3D"none">> isci links
(or very=
minimal traffic)<br clear=3D"none">> Is there some way to enable
the st=
orage offload functionality in Ovirt?<br clear=3D"none">> If not,
is thi=
s on the VDSM roadmap? If support were worked in this<br clear=3D"non=
e">> should be able to be applied to FCP connections as well. The
=
lio target<br clear=3D"none">> supports these offloads when acting
as a =
Fiber Channel target also.<br clear=3D"none">><br
clear=3D"none">> I'=
ve asked this sometime back but there hasn't been much in the way of<br cle=
ar=3D"none">> discussion on this users list or the devel list about
this=
feature.</div><br clear=3D"none">><br
clear=3D"none"><br clear=3D"none"=
yes, on the roadmap, tbd yet on when. netapp did a plugin enabling
this <b=
r clear=3D"none">for their storage array (VSC plugin)<br
clear=3D"none">I h=
ope the ceph integration will provide this, though that doesn't solve <br c=
lear=3D"none">it for other type of storage domains yet.<div
class=3D"yqt703=
9917945" id=3D"yqtfd07409"><br clear=3D"none"><br
clear=3D"none"></div><br>=
<br></div> </div> </div> </div></body></html>
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