3:03 p.m.
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Indeed, removing the disk snapshot from the 'Disk Snapshots' subtab will remove
only the snapshot of the disk, not the disk itself.
Regarding snapshot removal while the VM is running - this feature is pretty new (live
snapshot merge). AFAIK, this feature is tech preview for 3.5. It also depends on the OS
you're using on the hosts. RHEL 7.1 supports it, but again, as tech preview.
Therefore, the safest way to remove the snapshot of the disk would be to do it while the
VM is not running.
----- Original Message -----
From: "Rik Theys" <Rik.Theys(a)esat.kuleuven.be>
To: "Elad Ben Aharon" <ebenahar(a)redhat.com>
Cc: users(a)ovirt.org
Sent: Wednesday, 11 February, 2015 2:44:55 PM
Subject: Re: [ovirt-users] Can't remove snapshot due to low disk space on storage
domain?
Hi,
I created the snapshot on the Snapshots subtab of the Virtual machines
tab. I did this when my engine (and host) was running oVirt 3.4. It
is/was a snapshot of the entire VM (I deselected the memory state).
I since upgraded the engine to 3.5.
When I look at the snapshots subtab of the virtual machine, I see the
Current snapshot which is "Active VM" and the snapshot I created before.
This snapshot is a snapshot of both the OS and data disk.
I can not delete the second snapshot when the VM is running. If I power
down the VM, I can't remove the snapshot as it brings up the error I
mentioned before.
However, when I look at the disk snapshots subtab of the storage tab
(like you suggested), I see both disks with a snapshot and I can select
"Remove" there while the VM is running. Is it safe to remove them this
way? This will only remove the snapshot and not the disk (and data) from
my (running) VM?
Regards,
Rik
On 02/11/2015 01:26 PM, Elad Ben Aharon wrote:
I'm not sure I understand which RHEV version you're using
now.
If you're using RHEV 3.5, it is possible to remove a snapshot of a
single disk.
You can do it via webadmin, Under the 'Disks Snapshots' subtab of the
relevant storage domain, in the 'Storage' main tab.
As for your second question, the free space has to be in the same
storage domain.
------------------------------------------------------------------------
*From: *"Rik Theys" <Rik.Theys(a)esat.kuleuven.be>
*To: *"Elad Ben Aharon" <ebenahar(a)redhat.com>
*Cc: *users(a)ovirt.org
*Sent: *Wednesday, 11 February, 2015 2:10:13 PM
*Subject: *Re: [ovirt-users] Can't remove snapshot due to low disk
space on storage domain?
Hi,
Thats unfortunate :-(. It would have been great if oVirt told me during
the creation of the snapshot that I would be unable to remove it later
due to unsufficient free space in the storage domain :-).
The VM has two disks - a small and a large one - so the snapshot
contains both. Can I still remove the large disk while it has snapshots?
Luckily the used disk space in the (preallocated) large disk is low
enough so I can fit it on another temporary disk then.
Does the free space have to be in the same storage domain, or can oVirt
use another storage domain for the temporary volume? IOW, can I add an
NFS storage domain which oVirt can use to create the temporary disk on?
Regards,
Rik
On 02/11/2015 12:57 PM, Elad Ben Aharon wrote:
> *equals or larger than the disk size
>
> ------------------------------------------------------------------------
> *From: *"Elad Ben Aharon" <ebenahar(a)redhat.com>
> *To: *"Rik Theys" <Rik.Theys(a)esat.kuleuven.be>
> *Cc: *users(a)ovirt.org
> *Sent: *Wednesday, 11 February, 2015 12:18:35 PM
> *Subject: *Re: [ovirt-users] Can't remove snapshot due to low disk
> space on storage domain?
>
> Snapshot removal (merge) includes a create volume phase. This volume is
> temporary and gets removed once the snapshot merge is completed. Its
> size is the size of the disk.
> That means that in order to remove the snapshot, the storage domain
> should have available size that is equal to the disk size.
>
>
>
>
>
>
>
>
>
> Elad Ben Aharon
> RHEV-QE storage
>
>
> ------------------------------------------------------------------------
> *From: *"Rik Theys" <Rik.Theys(a)esat.kuleuven.be>
> *To: *users(a)ovirt.org
> *Sent: *Tuesday, 10 February, 2015 12:00:10 PM
> *Subject: *[ovirt-users] Can't remove snapshot due to low disk space
> on storage domain?
>
> Hi,
>
> I'm running the ovirt engine 3.4 series. I've created a snapshot of a VM
> with an OS and data disk before upgrading the machine.
>
> The upgrade went fine and I now want to remove the snapshot.
> Unfortunately this fails with the error:
>
> "Cannot remove Snapshot. Low disk space on target Storage Domain
> stadius-virt2_PERC."
>
> So I can't free disk space by removing the snapshot because I don't have
> enough space?
>
> When I look at the VM the disks are shown as preallocated (which is what
> I selected during installation). When I look at the storage tab and list
> the disks in my storage domain, the disks are now shown as thin
> provisioned with the actual size > virtual size.
>
> How can I remove this snapshot? I don't have enough free disk space in
> my storage domain to duplicate the data disk of my VM.
>
> Regards,
>
> Rik
>
>
> --
> Rik Theys
> System Engineer
> KU Leuven - Dept. Elektrotechniek (ESAT)
> Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee
> +32(0)16/32.11.07
> ----------------------------------------------------------------
> <<Any errors in spelling, tact or fact are transmission errors>>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
--
Rik Theys
System Engineer
KU Leuven - Dept. Elektrotechniek (ESAT)
Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee
+32(0)16/32.11.07
----------------------------------------------------------------
<<Any errors in spelling, tact or fact are transmission errors>>
--
Rik Theys
System Engineer
KU Leuven - Dept. Elektrotechniek (ESAT)
Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee
+32(0)16/32.11.07
----------------------------------------------------------------
<<Any errors in spelling, tact or fact are transmission errors>>
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<html><body><div style=3D"font-family: times new roman, new york,
times, se=
rif; font-size: 12pt; color: #000000"><div>Indeed, removing the disk
snapsh=
ot from the 'Disk Snapshots' subtab will remove only the snapshot of the di=
sk, not the disk itself.<br></div><div>Regarding snapshot removal while
the=
VM is running - this feature is pretty new (live snapshot merge). AF=
AIK, this feature is tech preview for 3.5. It also depends on the OS you're=
using on the hosts. RHEL 7.1 supports it, but again, as tech preview. <br>=
</div><div>Therefore, the safest way to remove the snapshot of the disk wou=
ld be to do it while the VM is not
running.<br></div><div><br></div><div><b=
r></div><hr id=3D"zwchr"><div
style=3D"color:#000;font-weight:normal;font-s=
tyle:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;fon=
t-size:12pt;"><b>From: </b>"Rik Theys"
&lt;Rik.Theys(a)esat.kuleuven.be&gt;<b=
r><b>To: </b>"Elad Ben Aharon"
&lt;ebenahar(a)redhat.com&gt;<br><b>Cc: </b>us=
ers(a)ovirt.org<br><b>Sent: </b>Wednesday, 11 February, 2015 2:44:55
PM<br><b=
Subject: </b>Re: [ovirt-users] Can't remove snapshot due to
low disk space=
on
storage domain?<br><div>=
<br></div>Hi,<br><div><br></div>I created the snapshot
on the Snapshots sub=
tab of the Virtual machines <br>tab. I did this when my engine (and host) w=
as running oVirt 3.4. It <br>is/was a snapshot of the entire VM (I deselect=
ed the memory state).<br><div><br></div>I since upgraded the
engine to 3.5.=
<br><div><br></div>When I look at the snapshots subtab of the
virtual machi=
ne, I see the <br>Current snapshot which is "Active VM" and the snapshot I
=
created before. <br>This snapshot is a snapshot of both the OS and data dis=
k.<br><div><br></div>I can not delete the second snapshot when the
VM is ru=
nning. If I power <br>down the VM, I can't remove the snapshot as it brings=
up the error I <br>mentioned
before.<br><div><br></div>However, when I loo=
k at the disk snapshots subtab of the storage tab <br>(like you suggested),=
I see both disks with a snapshot and I can select <br>"Remove" there
while=
the VM is running. Is it safe to remove them this <br>way? This will only =
remove the snapshot and not the disk (and data) from <br>my (running) VM?<b=
r><div><br></div>Regards,<br><div><br></div>Rik<br><div><br></div><br>On
02=
/11/2015 01:26 PM, Elad Ben Aharon wrote:<br>> I'm not sure I
understand=
which RHEV version you're using now.<br>> If you're using RHEV 3.5,
it =
is possible to remove a snapshot of a<br>> single disk.<br>> You
can =
do it via webadmin, Under the 'Disks Snapshots' subtab of the<br>>
relev=
ant storage domain, in the 'Storage' main tab.<br>><br>>
As for your =
second question, the free space has to be in the same<br>> storage domai=
n.<br>> ----------------------------------------------------------------=
--------<br>> *From: *"Rik Theys"
&lt;Rik.Theys(a)esat.kuleuven.be&gt;<br>=
> *To: *"Elad Ben Aharon"
&lt;ebenahar(a)redhat.com&gt;<br>&gt; *Cc: *user=
s(a)ovirt.org<br>&gt; *Sent: *Wednesday, 11 February, 2015 2:10:13
PM<br>>=
*Subject: *Re: [ovirt-users] Can't remove snapshot due to low
disk<br>>=
space on storage
domain?<br>><br>> Hi,<br=
><br>> Thats unfortunate :-(. It would have been
great if oVirt told=
me during<br>> the creation of the snapshot that
I would be unable to r=
emove it later<br>> due to unsufficient free space in the storage domain=
:-).<br>><br>> The VM has two disks - a small and a large one -
so t=
he snapshot<br>> contains both. Can I still remove the large disk while =
it has snapshots?<br>><br>> Luckily the used disk space in the
(preal=
located) large disk is low<br>> enough so I can fit it on another tempor=
ary disk then.<br>><br>> Does the free space have to be in the
same s=
torage domain, or can oVirt<br>> use another storage domain for the temp=
orary volume? IOW, can I add an<br>> NFS storage domain which oVirt can =
use to create the temporary disk on?<br>><br>>
Regards,<br>><br>&g=
t; Rik<br>><br>><br>> On 02/11/2015 12:57 PM, Elad
Ben Aharon wrot=
e:<br>> > *equals or larger than the disk
size<br>> &g=
t;<br>> >
-----------------------------------------------------=
-------------------<br>> > *From: *"Elad Ben
Aharon" <ebenah=
ar(a)redhat.com&gt;<br>&gt; > *To: *"Rik Theys"
&lt;Rik.Theys(a)esat.k=
uleuven.be><br>> > *Cc:
*users(a)ovirt.org<br>&gt; > =
*Sent: *Wednesday, 11 February, 2015 12:18:35 PM<br>> >
*Subjec=
t: *Re: [ovirt-users] Can't remove snapshot due to low disk<br>>
&=
gt; space on
storage =
domain?<br>> ><br>> > Snapshot
removal (merge) incl=
udes a create volume phase. This volume is<br>> > temporary
and=
gets removed once the snapshot merge is completed. Its<br>>
> =
size is the size of the disk.<br>> > That means that in
order t=
o remove the snapshot, the storage domain<br>> > should have
av=
ailable size that is equal to the disk size.<br>>
><br>> &nb=
sp;><br>> ><br>>
><br>> ><br>> &n=
bsp;><br>> ><br>>
><br>> ><br>> &=
nbsp;> Elad Ben Aharon<br>> > RHEV-QE
storage<br>> =
><br>> ><br>> >
--------------------------------=
----------------------------------------<br>> > *From:
*"Rik Th=
eys" &lt;Rik.Theys(a)esat.kuleuven.be&gt;<br>&gt; >
*To: *users@ovir=
t.org<br>> > *Sent: *Tuesday, 10 February, 2015 12:00:10
PM<br>=
> > *Subject: *[ovirt-users] Can't remove snapshot due to low
d=
isk space<br>> > on
storage domain?<=
br>> ><br>> >
Hi,<br>> ><br>> =
> I'm running the ovirt engine 3.4 series. I've created a snapshot of a =
VM<br>> > with an OS and data disk before upgrading the
machine=
.<br>> ><br>> > The upgrade
went fine and I now wan=
t to remove the snapshot.<br>> > Unfortunately this fails
with =
the error:<br>> ><br>> >
"Cannot remove Snapshot. L=
ow disk space on target Storage Domain<br>> >
stadius-virt2_PER=
C."<br>> ><br>> > So I
can't free disk space by rem=
oving the snapshot because I don't have<br>> > enough
space?<br=
> ><br>> > When
I look at the VM the disks are sho=
wn as preallocated (which is
what<br>> > I selected during inst=
allation). When I look at the storage tab and list<br>> >
the d=
isks in my storage domain, the disks are now shown as thin<br>>
&g=
t; provisioned with the actual size > virtual size.<br>>
><b=
r>> > How can I remove this snapshot? I don't have enough
free =
disk space in<br>> > my storage domain to duplicate the data
di=
sk of my VM.<br>> ><br>> >
Regards,<br>> &=
gt;<br>> > Rik<br>>
><br>> ><br>> &n=
bsp;> --<br>> > Rik Theys<br>>
> System Engineer=
<br>> > KU Leuven - Dept. Elektrotechniek
(ESAT)<br>> =
> Kasteelpark Arenberg 10 bus 2440 - B-3001
Leuven-Heverlee<br>>=
; > +32(0)16/32.11.07<br>> >
-------------------------=
---------------------------------------<br>> >
<<Any erro=
rs in spelling, tact or fact are transmission errors>><br>>
=
> _______________________________________________<br>>
> Use=
rs mailing list<br>> > Users(a)ovirt.org<br>&gt;
> http:=
//lists.ovirt.org/mailman/listinfo/users<br>>
><br>> &=
gt;<br>> >
_______________________________________________<br>&=
gt; > Users mailing list<br>> >
Users(a)ovirt.org<br>&gt=
; > http://lists.ovirt.org/mailman/listinfo/users<br>>
&g=
t;<br>><br>><br>> --<br>> Rik
Theys<br>> System Engineer<br>=
> KU Leuven - Dept. Elektrotechniek (ESAT)<br>> Kasteelpark Arenberg
=
10 bus 2440 - B-3001 Leuven-Heverlee<br>>
+32(0)16/32.11.07<br>>=
; ----------------------------------------------------------------<br>> =
<<Any errors in spelling, tact or fact are transmission
errors>>=
;<br>><br><div><br></div><br>-- <br>Rik
Theys<br>System Engineer<br>KU L=
euven - Dept. Elektrotechniek (ESAT)<br>Kasteelpark Arenberg 10 bus 2440 &n=
bsp;- B-3001 Leuven-Heverlee<br>+32(0)16/32.11.07<br>----------------------=
------------------------------------------<br><<Any errors in
spellin=
g, tact or fact are transmission
errors>><br></div><div><br></div></d=
iv></body></html>
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