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So ovirt access gluster vai FUSE ? i thought its using libgfapi.
When can we expect it to work with libgfapi ?
and what about the changelog of 4.1.3 ?
BZ 1022961 Gluster: running a VM from a gluster domain should use gluster U=
RI instead of a fuse mount"
--
Respectfully
Mahdi A. Mahdi
________________________________
From: users-bounces(a)ovirt.org <users-bounces(a)ovirt.org> on behalf of Ralf S=
chenk <rs(a)databay.de>
Sent: Monday, June 19, 2017 7:32:45 PM
To: users(a)ovirt.org
Subject: Re: [ovirt-users] Very poor GlusterFS performance
Hello,
Gluster-Performance is bad. Thats why I asked for native qemu-libgfapi acce=
ss for Ovirt-VM's to gluster volumes which I thought to be possible since 3=
.6.x. Documentation is misleading and still in 4.1.2 Ovirt is using fuse to=
mount gluster-based VM-Disks.
Bye
Am 19.06.2017 um 17:23 schrieb Darrell Budic:
Chris-
You probably need to head over to gluster-users@gluster.org<mailto:gluster-=
users(a)gluster.org> for help with performance issues.
That said, what kind of performance are you getting, via some form or testi=
ng like bonnie++ or even dd runs? Raw bricks vs gluster performance is usef=
ul to determine what kind of performance you=92re actually getting.
Beyond that, I=92d recommend dropping the arbiter bricks and re-adding them=
as full replicas, they can=92t serve distributed data in this configuratio=
n and may be slowing things down on you. If you=92ve got a storage network =
setup, make sure it=92s using the largest MTU it can, and consider adding/t=
esting these settings that I use on my main storage volume:
performance.io<http://performance.io>-thread-count: 32
client.event-threads: 8
server.event-threads: 3
performance.stat-prefetch: on
Good luck,
-Darrell
On Jun 19, 2017, at 9:46 AM, Chris Boot <bootc@bootc.net<mailto:bootc@bootc=
.net>> wrote:
Hi folks,
I have 3x servers in a "hyper-converged" oVirt 4.1.2 + GlusterFS 3.10
configuration. My VMs run off a replica 3 arbiter 1 volume comprised of
6 bricks, which themselves live on two SSDs in each of the servers (one
brick per SSD). The bricks are XFS on LVM thin volumes straight onto the
SSDs. Connectivity is 10G Ethernet.
Performance within the VMs is pretty terrible. I experience very low
throughput and random IO is really bad: it feels like a latency issue.
On my oVirt nodes the SSDs are not generally very busy. The 10G network
seems to run without errors (iperf3 gives bandwidth measurements of >=3D
9.20 Gbits/sec between the three servers).
To put this into perspective: I was getting better behaviour from NFS4
on a gigabit connection than I am with GlusterFS on 10G: that doesn't
feel right at all.
My volume configuration looks like this:
Volume Name: vmssd
Type: Distributed-Replicate
Volume ID: d5a5ddd1-a140-4e0d-b514-701cfe464853
Status: Started
Snapshot Count: 0
Number of Bricks: 2 x (2 + 1) =3D 6
Transport-type: tcp
Bricks:
Brick1: ovirt3:/gluster/ssd0_vmssd/brick
Brick2: ovirt1:/gluster/ssd0_vmssd/brick
Brick3: ovirt2:/gluster/ssd0_vmssd/brick (arbiter)
Brick4: ovirt3:/gluster/ssd1_vmssd/brick
Brick5: ovirt1:/gluster/ssd1_vmssd/brick
Brick6: ovirt2:/gluster/ssd1_vmssd/brick (arbiter)
Options Reconfigured:
nfs.disable: on
transport.address-family: inet6
performance.quick-read: off
performance.read-ahead: off
performance.io<http://performance.io>-cache: off
performance.stat-prefetch: off
performance.low-prio-threads: 32
network.remote-dio: off
cluster.eager-lock: enable
cluster.quorum-type: auto
cluster.server-quorum-type: server
cluster.data-self-heal-algorithm: full
cluster.locking-scheme: granular
cluster.shd-max-threads: 8
cluster.shd-wait-qlength: 10000
features.shard: on
user.cifs: off
storage.owner-uid: 36
storage.owner-gid: 36
features.shard-block-size: 128MB
performance.strict-o-direct: on
network.ping-timeout: 30
cluster.granular-entry-heal: enable
I would really appreciate some guidance on this to try to improve things
because at this rate I will need to reconsider using GlusterFS altogether.
Cheers,
Chris
--
Chris Boot
bootc@bootc.net<mailto:bootc@bootc.net>
_______________________________________________
Users mailing list
Users@ovirt.org<mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users@ovirt.org<mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users
--
[cid:part6.276D40AB.8385CD25@databay.de]
Ralf Schenk
fon +49 (0) 24 05 / 40 83 70
fax +49 (0) 24 05 / 40 83 759
mail rs@databay.de<mailto:rs@databay.de>
Databay AG
Jens-Otto-Krag-Stra=DFe 11
D-52146 W=FCrselen
www.databay.de<http://www.databay.de>
Sitz/Amtsgericht Aachen =95 HRB:8437 =95 USt-IdNr.: DE 210844202
Vorstand: Ralf Schenk, Dipl.-Ing. Jens Conze, Aresch Yavari, Dipl.-Kfm. Phi=
lipp Hermanns
Aufsichtsratsvorsitzender: Wilhelm Dohmen
________________________________
--_000_DM5PR01MB2506B56CD79F414521F215E7FFAB0DM5PR01MB2506prod_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html;
charset=3DWindows-1=
252">
</head>
<body text=3D"#000000" bgcolor=3D"#FFFFFF">
<style type=3D"text/css" style=3D"display:none;"><!-- P
{margin-top:0;margi=
n-bottom:0;} --></style>
<div id=3D"divtagdefaultwrapper"
style=3D"font-size:12pt;color:#000000;font=
-family:Calibri,Helvetica,sans-serif;" dir=3D"ltr">
<p>So ovirt access gluster vai FUSE ? i thought its using libgfapi.</p>
<p>When can we expect it to work with libgfapi ? </p>
<p>and what about the changelog of 4.1.3 ?</p>
<div><span style=3D"font-size: 12pt;">BZ 1022961 Gluster: running a
VM from=
a gluster domain should use gluster URI instead of a fuse mount"</spa=
n><br>
</div>
<p></p>
<p><br>
</p>
<div id=3D"Signature"><br>
<div class=3D"ecxmoz-signature">-- <br>
<br>
<font color=3D"#3366ff"><font
color=3D"#000000">Respectfully<b><br>
</b><b>Mahdi A. Mahdi</b></font></font><font
color=3D"#3366ff"><br>
<br>
</font><font color=3D"#3366ff"></font></div>
</div>
</div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font
face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b>
users-bounces(a)ovirt.o=
rg &lt;users-bounces(a)ovirt.org&gt; on behalf of Ralf Schenk &lt;rs(a)databay.=
de><br>
<b>Sent:</b> Monday, June 19, 2017 7:32:45 PM<br>
<b>To:</b> users(a)ovirt.org<br>
<b>Subject:</b> Re: [ovirt-users] Very poor GlusterFS
performance</font>
<div> </div>
</div>
<div>
<p><font face=3D"Helvetica, Arial,
sans-serif">Hello,</font></p>
<p><font face=3D"Helvetica, Arial, sans-serif">Gluster-Performance
is bad. =
Thats why I asked for native qemu-libgfapi access for Ovirt-VM's to gluster=
volumes which I thought to be possible since 3.6.x. Documentation is misle=
ading and still in 4.1.2 Ovirt is
using fuse to mount gluster-based VM-Disks.</font></p>
<p><font face=3D"Helvetica, Arial,
sans-serif"></font>Bye<br>
</p>
<br>
<div class=3D"moz-cite-prefix">Am 19.06.2017 um 17:23 schrieb Darrell
Budic=
:<br>
</div>
<blockquote type=3D"cite"
cite=3D"mid:D8AAF9DB-02FB-4B38-9E33-174134F5377C@=
onholyground.com">
Chris-
<div class=3D""><br class=3D"">
</div>
<div class=3D"">You probably need to head over to <a
href=3D"mailto:gluster=
-users(a)gluster.org" class=3D"" moz-do-not-send=3D"true">
gluster-users(a)gluster.org</a>&nbsp;for help with performance
issues.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">That said, what kind of performance are you getting, via
so=
me form or testing like bonnie++ or even dd runs? Raw bricks vs glu=
ster performance is useful to determine what kind of performance you=92re a=
ctually getting.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Beyond that, I=92d recommend dropping the arbiter bricks
an=
d re-adding them as full replicas, they can=92t serve distributed data in t=
his configuration and may be slowing things down on you. If you=92ve got a =
storage network setup, make sure it=92s using
the largest MTU it can, and consider adding/testing these settings that I =
use on my main storage volume:</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div style=3D"margin: 0px; line-height: normal;"
class=3D""><a href=3D"http=
://performance.io" class=3D""
moz-do-not-send=3D"true">performance.io</a>-t=
hread-count: 32</div>
<div style=3D"margin: 0px; line-height: normal;"
class=3D""><span style=3D"=
font-variant-ligatures: no-common-ligatures"
class=3D"">client.event-thread=
s: 8</span></div>
<div style=3D"margin: 0px; line-height: normal;"
class=3D""><span style=3D"=
font-variant-ligatures: no-common-ligatures"
class=3D"">server.event-thread=
s: 3</span></div>
<div style=3D"margin: 0px; line-height: normal;"
class=3D"">performance.sta=
t-prefetch: on</div>
</div>
<div class=3D""><span style=3D"font-variant-ligatures:
no-common-ligatures" class=3D""><br
class=3D"">
</span></div>
<div class=3D""><span style=3D"font-variant-ligatures:
no-common-ligatures" class=3D"">Good
luck,</span></div>
<div class=3D""><span style=3D"font-variant-ligatures:
no-common-ligatures" class=3D""><br
class=3D"">
</span></div>
<div class=3D""><span style=3D"font-variant-ligatures:
no-common-ligatures" class=3D"">
-Darrell</span></div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Jun 19, 2017, at 9:46 AM, Chris Boot <<a
href=3D"mail=
to:bootc@bootc.net" class=3D""
moz-do-not-send=3D"true">bootc(a)bootc.net</a>=
> wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div class=3D"">Hi folks,<br class=3D"">
<br class=3D"">
I have 3x servers in a "hyper-converged" oVirt 4.1.2 + Gluste=
rFS 3.10<br class=3D"">
configuration. My VMs run off a replica 3 arbiter 1 volume comprised of<br =
class=3D"">
6 bricks, which themselves live on two SSDs in each of the servers (one<br =
class=3D"">
brick per SSD). The bricks are XFS on LVM thin volumes straight onto the<br=
class=3D"">
SSDs. Connectivity is 10G Ethernet.<br class=3D"">
<br class=3D"">
Performance within the VMs is pretty terrible. I experience very low<br cla=
ss=3D"">
throughput and random IO is really bad: it feels like a latency issue.<br c=
lass=3D"">
On my oVirt nodes the SSDs are not generally very busy. The 10G network<br =
class=3D"">
seems to run without errors (iperf3 gives bandwidth measurements of >=3D=
<br class=3D"">
9.20 Gbits/sec between the three servers).<br class=3D"">
<br class=3D"">
To put this into perspective: I was getting better behaviour from NFS4<br c=
lass=3D"">
on a gigabit connection than I am with GlusterFS on 10G: that doesn't<br cl=
ass=3D"">
feel right at all.<br class=3D"">
<br class=3D"">
My volume configuration looks like this:<br class=3D"">
<br class=3D"">
Volume Name: vmssd<br class=3D"">
Type: Distributed-Replicate<br class=3D"">
Volume ID: d5a5ddd1-a140-4e0d-b514-701cfe464853<br class=3D"">
Status: Started<br class=3D"">
Snapshot Count: 0<br class=3D"">
Number of Bricks: 2 x (2 + 1) =3D 6<br class=3D"">
Transport-type: tcp<br class=3D"">
Bricks:<br class=3D"">
Brick1: ovirt3:/gluster/ssd0_vmssd/brick<br class=3D"">
Brick2: ovirt1:/gluster/ssd0_vmssd/brick<br class=3D"">
Brick3: ovirt2:/gluster/ssd0_vmssd/brick (arbiter)<br class=3D"">
Brick4: ovirt3:/gluster/ssd1_vmssd/brick<br class=3D"">
Brick5: ovirt1:/gluster/ssd1_vmssd/brick<br class=3D"">
Brick6: ovirt2:/gluster/ssd1_vmssd/brick (arbiter)<br class=3D"">
Options Reconfigured:<br class=3D"">
nfs.disable: on<br class=3D"">
transport.address-family: inet6<br class=3D"">
performance.quick-read: off<br class=3D"">
performance.read-ahead: off<br class=3D"">
<a href=3D"http://performance.io" class=3D""
moz-do-not-send=3D"true">perfo=
rmance.io</a>-cache: off<br class=3D"">
performance.stat-prefetch: off<br class=3D"">
performance.low-prio-threads: 32<br class=3D"">
network.remote-dio: off<br class=3D"">
cluster.eager-lock: enable<br class=3D"">
cluster.quorum-type: auto<br class=3D"">
cluster.server-quorum-type: server<br class=3D"">
cluster.data-self-heal-algorithm: full<br class=3D"">
cluster.locking-scheme: granular<br class=3D"">
cluster.shd-max-threads: 8<br class=3D"">
cluster.shd-wait-qlength: 10000<br class=3D"">
features.shard: on<br class=3D"">
user.cifs: off<br class=3D"">
storage.owner-uid: 36<br class=3D"">
storage.owner-gid: 36<br class=3D"">
features.shard-block-size: 128MB<br class=3D"">
performance.strict-o-direct: on<br class=3D"">
network.ping-timeout: 30<br class=3D"">
cluster.granular-entry-heal: enable<br class=3D"">
<br class=3D"">
I would really appreciate some guidance on this to try to improve things<br=
class=3D"">
because at this rate I will need to reconsider using GlusterFS altogether.<=
br class=3D"">
<br class=3D"">
Cheers,<br class=3D"">
Chris<br class=3D"">
<br class=3D"">
-- <br class=3D"">
Chris Boot<br class=3D"">
<a href=3D"mailto:bootc@bootc.net" class=3D""
moz-do-not-send=3D"true">boot=
c(a)bootc.net</a><br class=3D"">
_______________________________________________<br class=3D"">
Users mailing list<br class=3D"">
<a class=3D"moz-txt-link-abbreviated"
href=3D"mailto:Users@ovirt.org">Users=
@ovirt.org</a><br class=3D"">
<a class=3D"moz-txt-link-freetext"
href=3D"http://lists.ovirt.org/mailman/l=
istinfo/users">http://lists.ovirt.org/mailman/listinfo/users</...
class=
=3D"">
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
<br>
<fieldset class=3D"mimeAttachmentHeader"></fieldset> <br>
<pre wrap=3D"">_______________________________________________
Users mailing list
<a class=3D"moz-txt-link-abbreviated"
href=3D"mailto:Users@ovirt.org">Users=
@ovirt.org</a>
<a class=3D"moz-txt-link-freetext"
href=3D"http://lists.ovirt.org/mailman/l=
istinfo/users">http://lists.ovirt.org/mailman/listinfo/users</...
</pre>
</blockquote>
<br>
<div class=3D"moz-signature">-- <br>
<p></p>
<table cellspacing=3D"0" cellpadding=3D"0"
border=3D"0">
<tbody>
<tr>
<td colspan=3D"3"><img height=3D"30" width=3D"151"
border=3D"0" src=3D"cid:=
part6.276D40AB.8385CD25(a)databay.de"></td>
</tr>
<tr>
<td valign=3D"top"><font size=3D"-1" face=3D"Verdana,
Arial,
sans-serif"><br>
<b>Ralf Schenk</b><br>
fon +49 (0) 24 05 / 40 83 70<br>
fax +49 (0) 24 05 / 40 83 759<br>
mail <a href=3D"mailto:rs@databay.de"><font
color=3D"#FF0000"><b>rs@databay=
.de</b></font></a><br>
</font></td>
<td width=3D"30"> </td>
<td valign=3D"top"><font size=3D"-1" face=3D"Verdana,
Arial,
sans-serif"><br>
<b>Databay AG</b><br>
Jens-Otto-Krag-Stra=DFe 11<br>
D-52146 W=FCrselen<br>
<a href=3D"http://www.databay.de"><font
color=3D"#FF0000"><b>www.databay.de=
</b></font></a>
</font></td>
</tr>
<tr>
<td colspan=3D"3" valign=3D"top"><font size=3D"1"
face=3D"Verdana,
Arial, sans-serif"><br>
Sitz/Amtsgericht Aachen =95 HRB:8437 =95 USt-IdNr.: DE 210844202<br>
Vorstand: Ralf Schenk, Dipl.-Ing. Jens Conze, Aresch Yavari, Dipl.-Kfm. Phi=
lipp Hermanns<br>
Aufsichtsratsvorsitzender: Wilhelm Dohmen </font></td>
</tr>
</tbody>
</table>
<hr noshade=3D"noshade" size=3D"1" color=3D"#000000"
width=3D"100%">
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