8:25 p.m.
Dear All,
Does someone had seen that error ? When I run this command from my
virtual machine:
# time dd if=/dev/zero of=enrico.dd bs=4k count=10000000
VM was paused due to kind a storage error/problem. Strange message
because tell about "no storage space error" but ovirt puts virtual
machine in
a paused state.
Inside events from ovirt web interface I see this:
"VM has been paused due to lack of storage space"
but no ERROR found in /var/log/vdsm.log.
My oVirt enviroment 4.2.1 has three hypervivosr with FC storage and
before now
I haven't see any other problem during the normal functioning of the vm
, it's seem
that this error occurs only when there is massive I/O.
Any ideas ?
Thanks a lot.
Best Regards
Enrico
--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchetti<at>pg.infn.it
______________________________________________________________________
9:43 p.m.
This is a multi-part message in MIME format.
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yes ... it's a thin provisioning , in fact with preallocated disk type I
haven't any problem.
Thanks you so much
Best Regards
Enrico
Il 16/03/2018 13:28, Karli Sjöberg ha scritto:
Den 16 mars 2018 12:26 skrev Enrico Becchetti
<enrico.becchetti(a)pg.infn.it>:
Dear All,
Does someone had seen that error ? When I run this command from my
virtual machine:
# time dd if=/dev/zero of=enrico.dd bs=4k count=10000000
VM was paused due to kind a storage error/problem. Strange message
because tell about "no storage space error" but ovirt puts virtual
machine in
a paused state.
Inside events from ovirt web interface I see this:
"VM has been paused due to lack of storage space"
but no ERROR found in /var/log/vdsm.log.
My oVirt enviroment 4.2.1 has three hypervivosr with FC storage and
before now
I haven't see any other problem during the normal functioning of
the vm
, it's seem
that this error occurs only when there is massive I/O.
Any ideas ?
Thanks a lot.
Best Regards
Enrico
--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchettipg.infn.it
______________________________________________________________________
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
I think I remember something to do with thin provisioning and not
being able to grow fast enough, so out of space. Are the VM's disk
thick or thin?
/K
Dear All,
Does someone had seen that error ? When I run this command from my
virtual machine:
# time dd if=/dev/zero of=enrico.dd bs=4k count=10000000
VM was paused due to kind a storage error/problem. Strange message
because tell about "no storage space error" but ovirt puts virtual
machine in
a paused state.
Inside events from ovirt web interface I see this:
"VM has been paused due to lack of storage space"
but no ERROR found in /var/log/vdsm.log.
My oVirt enviroment 4.2.1 has three hypervivosr with FC storage and
before now
I haven't see any other problem during the normal functioning of the vm
, it's seem
that this error occurs only when there is massive I/O.
Any ideas ?
Thanks a lot.
Best Regards
Enrico
--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchettipg.infn.it
______________________________________________________________________
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchetti<at>pg.infn.it
______________________________________________________________________
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<div class="moz-cite-prefix">yes ... it's a thin provisioning ,
in
fact with preallocated disk type I haven't any problem.<br>
Thanks you so much <br>
Best Regards<br>
Enrico<br>
<br>
Il 16/03/2018 13:28, Karli Sjöberg ha scritto:<br>
</div>
<blockquote type="cite"
cite="mid:e14510c4-501c-46e6-bdf9-bc65d20f0bb7@email.android.com">
<meta name="Generator" content="Z-Push">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<span style="font-size: 11pt">
<div dir="auto">
<div><br>
<div class="gmail_extra"><br>
<div class="gmail_quote">Den 16 mars 2018 12:26 skrev
Enrico Becchetti <a class="moz-txt-link-rfc2396E"
href="mailto:enrico.becchetti@pg.infn.it"><enrico.becchetti@pg.infn.it></a>:<br
type="attribution">
<blockquote class="quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> Dear All,<br>
Does someone had seen that error ? When I run this
command from my <br>
virtual machine:<br>
<br>
# time dd if=/dev/zero of=enrico.dd bs=4k
count=10000000<br>
<br>
VM was paused due to kind a storage error/problem.
Strange message<br>
because tell about "no storage space error" but
ovirt puts virtual <br>
machine in<br>
a paused state.<br>
<br>
Inside events from ovirt web interface I see
this:<br>
<br>
"VM has been paused due to lack of storage space"<br>
<br>
but no ERROR found in /var/log/vdsm.log.<br>
<br>
My oVirt enviroment 4.2.1 has three hypervivosr with
FC storage and <br>
before now<br>
I haven't see any other problem during the normal
functioning of the vm <br>
, it's seem<br>
that this error occurs only when there is massive
I/O.<br>
<br>
Any ideas ?<br>
Thanks a lot.<br>
Best Regards<br>
Enrico<br>
<br>
<br>
-- <br>
_______________________________________________________________________<br>
<br>
Enrico Becchetti Servizio di Calcolo e Reti<br>
<br>
Istituto Nazionale di Fisica Nucleare - Sezione di
Perugia<br>
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia
(ITALY)<br>
Phone:+39 075 5852777 Mail:
Enrico.Becchettipg.infn.it<br>
______________________________________________________________________<br>
<br>
_______________________________________________<br>
Users mailing list<br>
<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a><br>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</div>
</blockquote>
</div>
<br>
</div>
</div>
<div class="gmail_extra" dir="auto">I think I
remember
something to do with thin provisioning and not being able to
grow fast enough, so out of space. Are the VM's disk thick
or thin?</div>
<div class="gmail_extra" dir="auto"><br>
</div>
<div class="gmail_extra" dir="auto">/K</div>
</div>
</span> Dear All,<br>
Does someone had seen that error ? When I run this command from my
<br>
virtual machine:<br>
<br>
# time dd if=/dev/zero of=enrico.dd bs=4k count=10000000<br>
<br>
VM was paused due to kind a storage error/problem. Strange message<br>
because tell about "no storage space error" but ovirt puts virtual
<br>
machine in<br>
a paused state.<br>
<br>
Inside events from ovirt web interface I see this:<br>
<br>
"VM has been paused due to lack of storage space"<br>
<br>
but no ERROR found in /var/log/vdsm.log.<br>
<br>
My oVirt enviroment 4.2.1 has three hypervivosr with FC storage
and <br>
before now<br>
I haven't see any other problem during the normal functioning of
the vm <br>
, it's seem<br>
that this error occurs only when there is massive I/O.<br>
<br>
Any ideas ?<br>
Thanks a lot.<br>
Best Regards<br>
Enrico<br>
<br>
-- <br>
_______________________________________________________________________<br>
<br>
Enrico Becchetti Servizio di Calcolo e Reti<br>
<br>
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia<br>
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)<br>
Phone:+39 075 5852777 Mail: Enrico.Becchetti<at>pg.infn.it<br>
______________________________________________________________________<br>
<br>
_______________________________________________<br>
Users mailing list<br>
<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a><br>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</at></blockquote>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchetti<at>pg.infn.it
______________________________________________________________________ </pre>
</body>
</html>
--------------BED635C9A6D1FFD50A694810--
10:46 p.m.
Le 16/03/2018 à 13:28, Karli Sjöberg a écrit :
Den 16 mars 2018 12:26 skrev Enrico Becchetti <enrico.becchetti(a)pg.infn.it>:
Dear All,
Does someone had seen that error ?
Yes, I experienced it dozens of times on 3.6 (my 4.2 setup has
insufficient workload to trigger such event).
And in every case, there was no actual lack of space.
Enrico Becchetti Servizio di Calcolo e Reti
I think I remember something to do with thin provisioning and not being
able to grow fast enough, so out of space. Are the VM's disk thick or thin?
All our storage domains are thin-prov. and served by iSCSI (Equallogic
PS6xxx and 4xxx).
Enrico, do you know if a bug has been filed about this?
--
Nicolas ECARNOT
11:48 p.m.
On 16/03/18 13:46, Nicolas Ecarnot wrote:
Le 16/03/2018 à 13:28, Karli Sjöberg a écrit :
>
>
> Den 16 mars 2018 12:26 skrev Enrico Becchetti
> <enrico.becchetti(a)pg.infn.it>:
>
> Dear All,
> Does someone had seen that error ?
Yes, I experienced it dozens of times on 3.6 (my 4.2 setup has
insufficient workload to trigger such event).
And in every case, there was no actual lack of space.
> Enrico Becchetti Servizio di Calcolo e Reti
> I think I remember something to do with thin provisioning and not
> being able to grow fast enough, so out of space. Are the VM's disk
> thick or thin?
All our storage domains are thin-prov. and served by iSCSI (Equallogic
PS6xxx and 4xxx).
Enrico, do you know if a bug has been filed about this?
Did the VM remain paused? In my experience the VM just gets temporarily
paused while the storage is expanded. RH confirmed to me in a ticket
that this is expected behaviour.
If you need high write performance your VM disks should always be
preallocated. We only use Thin Provision for VMs where we know that disk
writes are low (eg network services, CPU-bound apps, etc).
Alex
--
This message is intended only for the addressee and may contain
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disclose its contents or use it in any way and are requested to delete
the message along with any attachments and notify us immediately.
This email is not intended to, nor should it be taken to, constitute advice.
The information provided is correct to our knowledge & belief and must not
be used as a substitute for obtaining tax, regulatory, investment, legal or
any other appropriate advice.
"Transact" is operated by Integrated Financial Arrangements Ltd.
29 Clement's Lane, London EC4N 7AE. Tel: (020) 7608 4900 Fax: (020) 7608 5300.
(Registered office: as above; Registered in England and Wales under
number: 3727592). Authorised and regulated by the Financial Conduct
Authority (entered on the Financial Services Register; no. 190856).
12:37 a.m.
Le 16/03/2018 à 15:48, Alex Crow a écrit :
On 16/03/18 13:46, Nicolas Ecarnot wrote:
> Le 16/03/2018 à 13:28, Karli Sjöberg a écrit :
>>
>>
>> Den 16 mars 2018 12:26 skrev Enrico Becchetti
>> <enrico.becchetti(a)pg.infn.it>:
>>
>> Dear All,
>> Does someone had seen that error ?
>
> Yes, I experienced it dozens of times on 3.6 (my 4.2 setup has
> insufficient workload to trigger such event).
> And in every case, there was no actual lack of space.
>
>> Enrico Becchetti Servizio di Calcolo e Reti
>> I think I remember something to do with thin provisioning and not
>> being able to grow fast enough, so out of space. Are the VM's disk
>> thick or thin?
>
> All our storage domains are thin-prov. and served by iSCSI (Equallogic
> PS6xxx and 4xxx).
>
> Enrico, do you know if a bug has been filed about this?
>
Did the VM remain paused? In my experience the VM just gets temporarily
paused while the storage is expanded. RH confirmed to me in a ticket
that this is expected behaviour.
AFAIR, most of them went back up and running by themselves (we had to
manually some of them from times to times).
The storage side weakness is an interesting trail to follow.
We also experienced this behavior when migrating lots of VMs at once,
yet using a dedicated storage network.
Being on this mailing list since long, I remember we already discussed
several times about how some users feel how oVirt can appear sensitive
to storage latencies. On my side, the site where most of our workload
resides is still in 3.6, so I can not yet witness the efforts oVirt devs
have made to cope with this in 4.2 but I'm sure they did.
--
Nicolas ECARNOT
6:48 p.m.
Il 16/03/2018 15:48, Alex Crow ha scritto:
On 16/03/18 13:46, Nicolas Ecarnot wrote:
> Le 16/03/2018 à 13:28, Karli Sjöberg a écrit :
>>
>>
>> Den 16 mars 2018 12:26 skrev Enrico Becchetti
>> <enrico.becchetti(a)pg.infn.it>:
>>
>> Dear All,
>> Does someone had seen that error ?
>
> Yes, I experienced it dozens of times on 3.6 (my 4.2 setup has
> insufficient workload to trigger such event).
> And in every case, there was no actual lack of space.
>
>> Enrico Becchetti Servizio di Calcolo e Reti
>> I think I remember something to do with thin provisioning and not
>> being able to grow fast enough, so out of space. Are the VM's disk
>> thick or thin?
>
> All our storage domains are thin-prov. and served by iSCSI
> (Equallogic PS6xxx and 4xxx).
>
> Enrico, do you know if a bug has been filed about this?
>
Did the VM remain paused? In my experience the VM just gets
temporarily paused while the storage is expanded. RH confirmed to me
in a ticket that this is expected behaviour.
If you need high write performance your VM disks should always be
preallocated. We only use Thin Provision for VMs where we know that
disk writes are low (eg network services, CPU-bound apps, etc).
Thanks a lot !!!
Best Regards
Enrico
Alex
--
This message is intended only for the addressee and may contain
confidential information. Unless you are that person, you may not
disclose its contents or use it in any way and are requested to delete
the message along with any attachments and notify us immediately.
This email is not intended to, nor should it be taken to, constitute
advice.
The information provided is correct to our knowledge & belief and must
not
be used as a substitute for obtaining tax, regulatory, investment,
legal or
any other appropriate advice.
"Transact" is operated by Integrated Financial Arrangements Ltd.
29 Clement's Lane, London EC4N 7AE. Tel: (020) 7608 4900 Fax: (020)
7608 5300.
(Registered office: as above; Registered in England and Wales under
number: 3727592). Authorised and regulated by the Financial Conduct
Authority (entered on the Financial Services Register; no. 190856).
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchetti<at>pg.infn.it
______________________________________________________________________
5:17 p.m.
On Fri, Mar 16, 2018 at 1:25 PM, Enrico Becchetti <
enrico.becchetti(a)pg.infn.it> wrote:
Dear All,
Does someone had seen that error ? When I run this command from my virtual
machine:
# time dd if=/dev/zero of=enrico.dd bs=4k count=10000000
I don't think it's a very interesting test case for IO performance, but in
any case, it may cause the VM to try to write faster than its thin
provisioned disk can be extended.
A simple workaround would be to change in VDSM the threshold of when it
gets extended and by how much.
For example:
[irs]
volume_utilization_percent = 15
volume_utilization_chunk_mb = 4048
Y.
VM was paused due to kind a storage error/problem. Strange message
because tell about "no storage space error" but ovirt puts virtual machine
in
a paused state.
Inside events from ovirt web interface I see this:
"VM has been paused due to lack of storage space"
but no ERROR found in /var/log/vdsm.log.
My oVirt enviroment 4.2.1 has three hypervivosr with FC storage and before
now
I haven't see any other problem during the normal functioning of the vm ,
it's seem
that this error occurs only when there is massive I/O.
Any ideas ?
Thanks a lot.
Best Regards
Enrico
--
_______________________________________________________________________
Enrico Becchetti Servizio di Calcolo e Reti
Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica 06123 Perugia (ITALY)
Phone:+39 075 5852777 Mail: Enrico.Becchetti<at>pg.infn.it
______________________________________________________________________
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2291
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7 comments
5 participants
participants (5)
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Alex Crow -
Enrico Becchetti -
Karli Sjöberg -
Nicolas Ecarnot -
Yaniv Kaul