Re: [ovirt-users] Snapshot removal

[Tomas Jelinek]

On Wed, Sep 27, 2017 at 8:26 AM, Yaniv Kaul  wrote:

>
>
> On Fri, Sep 22, 2017 at 12:01 PM, Lionel Caignec  wrote:
>
>> Hi,
>>
>> i'm wondering if it possible to delete at same time snapshots of
>> differents VM ? Or is it necessary to do it only one at a time?
>>
>
> There should not be an issue deleting them at the same time.
>

well, yes, but you can not multiselect 20 snapshots from 10 different VMs
and press "remove" in the current UI. I believe this is what the question
was about.


> Y.
>
>
>> --
>> Lionel
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>
>
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Re: [ovirt-users] Snapshot removal

[Yaniv Kaul]

On Fri, Sep 22, 2017 at 12:01 PM, Lionel Caignec  wrote:

> Hi,
>
> i'm wondering if it possible to delete at same time snapshots of
> differents VM ? Or is it necessary to do it only one at a time?
>

There should not be an issue deleting them at the same time.
Y.


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Re: [ovirt-users] Snapshot removal vs selinux enforced

[Lionel Caignec]

I reply myself if it can help somemone.
I found a solution with audit2allow/audit2why creating a policy containing this 
: 
type systemd_machined_t;
type svirt_t;
type fixed_disk_device_t;
class blk_file write;
class dir search;
}

It seems to work, and i can keep my host in selinux enforced.

- Mail original -
De: "Lionel Caignec" <caig...@cines.fr>
À: "users" <users@ovirt.org>
Envoyé: Lundi 25 Septembre 2017 15:37:16
Objet: [ovirt-users] Snapshot removal vs selinux enforced

Hi,

i have a problem with selinux enforced.
When i tried to live remove a snapshot the operation failed . After some 
headache i found the problem source : selinux.
When i "setenfore 0" the removal task work, when i "setenforce 1" removal task 
failed.

log from audit.log:
  vc: denied {write} for pid = 28360 tmptext = system_u: object_r : 
fixed_disk_device_t: s0 tclass = blk_file

I'm with RHEL 7.4 and ovirt 4.1, is it some specific configuration to do?.

Thanks for help.
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[ovirt-users] Snapshot removal vs selinux enforced

[Lionel Caignec]

Hi,

i have a problem with selinux enforced.
When i tried to live remove a snapshot the operation failed . After some 
headache i found the problem source : selinux.
When i "setenfore 0" the removal task work, when i "setenforce 1" removal task 
failed.

log from audit.log:
  vc: denied {write} for pid = 28360 tmptext = system_u: object_r : 
fixed_disk_device_t: s0 tclass = blk_file

I'm with RHEL 7.4 and ovirt 4.1, is it some specific configuration to do?.

Thanks for help.
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Re: [ovirt-users] Snapshot removal time

[Ala Hino]

On Sep 22, 2017 3:54 PM, "Troels Arvin"  wrote:

Hello,

Ala wrote:
> What's the version of the manager (engine)?

4.1.1



> Could you please provide the link or the SPM and the host
> running the VM?

I don't understand that. I cannot provide intimate details about the
installation, nor a link to it.


Typo. I meant logs, not links.



--
Regards,
Troels

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Re: [ovirt-users] Snapshot removal time

[Troels Arvin]

Hello,

Ala wrote:
> What's the version of the manager (engine)?

4.1.1



> Could you please provide the link or the SPM and the host 
> running the VM?

I don't understand that. I cannot provide intimate details about the 
installation, nor a link to it.


-- 
Regards,
Troels

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Re: [ovirt-users] Snapshot removal time

[Ala Hino]

Hello,

What's the version of the manager (engine)?

Could you please provide the link or the SPM and the host running the VM?

Thanks,
Ala

On Sep 22, 2017 1:19 PM, "Troels Arvin"  wrote:

> Hello,
>
> I have a RHV 4.1 virtualized guest-server with a number of rather large
> VirtIO virtual disks attached. The virtual disks are allocated from a
> fibre channel (block) storage domain. The hypervisor servers run RHEL 7.4.
>
> When I take a snapshot of the guest, then it takes a long time to remove
> the snapshots again, when the guest is powered off (a snapshot of a 2 TiB
> disk takes around 3 hours to remove). However, when the guest is running,
> then snapshot removal is very quick (perhaps around five minutes per
> snapshot). The involved disks have not been written much to while they
> had snapshots.
>
> I would expect the opposite: I.e., when the guest is turned off, then I
> would assume that oVirt can handle snapshot removal in a much more
> aggressive fashion than when performing a live snapshot removal?
>
> When performing offline snapshot removal, then on the hypervisor having
> the SPM role, I see the following in output from "ps xauw":
>
> vdsm 10255 8.3 0.0 389144 27196 ? S convert -p -t none -T none -f qcow2 /rhev/data-center/mnt/blockSD/xxx/
> images/yyy/zzz -O raw /rhev/data-center/mnt/blockSD/xxx/images/yyy/
> zzz_MERGE
>
> I don't see the same kind of process running on a guest's hypervisor when
> online snapshot removal is in progress.
>
> I've read most of https://www.ovirt.org/develop/release-management/
> features/storage/remove-snapshot/
> My interpretation from that document is that I should expect to see "qemu-
> img commit" commands instead of "qemu-img convert" processes. Or?
>
> The RHV system involved is somewhat old, having been upgrade many times
> from 3.x through 4.1. Could it be that it carries around old left-overs
> which results in obsolete snapshot removal behavior?
>
> --
> Regards,
> Troels Arvin
>
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[ovirt-users] Snapshot removal time

[Troels Arvin]

Hello,

I have a RHV 4.1 virtualized guest-server with a number of rather large 
VirtIO virtual disks attached. The virtual disks are allocated from a 
fibre channel (block) storage domain. The hypervisor servers run RHEL 7.4.

When I take a snapshot of the guest, then it takes a long time to remove 
the snapshots again, when the guest is powered off (a snapshot of a 2 TiB 
disk takes around 3 hours to remove). However, when the guest is running, 
then snapshot removal is very quick (perhaps around five minutes per 
snapshot). The involved disks have not been written much to while they 
had snapshots.

I would expect the opposite: I.e., when the guest is turned off, then I 
would assume that oVirt can handle snapshot removal in a much more 
aggressive fashion than when performing a live snapshot removal?

When performing offline snapshot removal, then on the hypervisor having 
the SPM role, I see the following in output from "ps xauw":

vdsm 10255 8.3 0.0 389144 27196 ? Shttps://www.ovirt.org/develop/release-management/
features/storage/remove-snapshot/
My interpretation from that document is that I should expect to see "qemu-
img commit" commands instead of "qemu-img convert" processes. Or?

The RHV system involved is somewhat old, having been upgrade many times 
from 3.x through 4.1. Could it be that it carries around old left-overs 
which results in obsolete snapshot removal behavior?

-- 
Regards,
Troels Arvin

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[ovirt-users] Snapshot removal

[Lionel Caignec]

Hi,

i'm wondering if it possible to delete at same time snapshots of differents VM 
? Or is it necessary to do it only one at a time?

--
Lionel 
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Re: [ovirt-users] Snapshot removal

[Federico Simoncelli]

- Original Message -
 From: Dafna Ron d...@redhat.com
 To: users@ovirt.org
 Sent: Thursday, April 17, 2014 12:52:04 PM
 Subject: Re: [ovirt-users] Snapshot removal
 
 NFS is wipe_after_delete=true always.
 so delete of snapshot will merge the data to upper level image + zero in
 on the data which is why this is taking a long time.

I double checked this and I was very much surprised by this finding!

We need a bz right away, Dafna can file it? Thanks!

-- 
Federico
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Re: [ovirt-users] Snapshot removal

[Michal Skrivanek]

On Apr 15, 2014, at 04:09 , Maurice Moe James mja...@media-node.com wrote:

 Is it it me or does it take a very long time to delete a snapshot?
 Upwards of 30 minutes to delete a snapshot of a 7 GB drive

what kind of storage you're using? if it is block-based it zeroes out the data 
which takes time

 
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Re: [ovirt-users] Snapshot removal

[Maurice James]

Im using NFS

- Original Message -
From: Michal Skrivanek michal.skriva...@redhat.com
To: Maurice Moe James mja...@media-node.com
Cc: users@ovirt.org
Sent: Thursday, April 17, 2014 5:44:45 AM
Subject: Re: [ovirt-users] Snapshot removal


On Apr 15, 2014, at 04:09 , Maurice Moe James mja...@media-node.com wrote:

 Is it it me or does it take a very long time to delete a snapshot?
 Upwards of 30 minutes to delete a snapshot of a 7 GB drive

what kind of storage you're using? if it is block-based it zeroes out the data 
which takes time

 
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 Users@ovirt.org
 http://lists.ovirt.org/mailman/listinfo/users

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Re: [ovirt-users] Snapshot removal

[Dafna Ron]

NFS is wipe_after_delete=true always.
so delete of snapshot will merge the data to upper level image + zero in 
on the data which is why this is taking a long time.



On 04/17/2014 11:47 AM, Maurice James wrote:

Im using NFS

- Original Message -
From: Michal Skrivanek michal.skriva...@redhat.com
To: Maurice Moe James mja...@media-node.com
Cc: users@ovirt.org
Sent: Thursday, April 17, 2014 5:44:45 AM
Subject: Re: [ovirt-users] Snapshot removal


On Apr 15, 2014, at 04:09 , Maurice Moe James mja...@media-node.com wrote:


Is it it me or does it take a very long time to delete a snapshot?
Upwards of 30 minutes to delete a snapshot of a 7 GB drive

what kind of storage you're using? if it is block-based it zeroes out the data 
which takes time


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[ovirt-users] Snapshot removal

[Maurice Moe James]

Is it it me or does it take a very long time to delete a snapshot?
Upwards of 30 minutes to delete a snapshot of a 7 GB drive

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