* Problem when creating snashots
@ 2006-09-26 15:08 The MoonSeeker
2006-09-26 21:14 ` Jan Blunck
2006-09-27 10:03 ` Bernd Zeimetz
0 siblings, 2 replies; 9+ messages in thread
From: The MoonSeeker @ 2006-09-26 15:08 UTC (permalink / raw)
To: dm-devel
Hi,
I'd like to create many snaphot of an image but I've got when I
attemp to create the 32th snapshot :
root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
Rounding up size to full physical extent 152.00 MB
device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
Failed to suspend origin vps-core
I don't understand the error..
This what I get when scaning the LVM :
root@B03-PC:/diplome# lvscan
ACTIVE Original '/dev/openvz/vps-core' [200.00 MB] inherit
ACTIVE '/dev/openvz/232' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/201' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/202' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/203' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/204' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/205' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/206' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/207' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/208' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/209' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/210' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/211' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/212' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/213' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/214' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/215' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/216' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/217' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/218' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/219' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/220' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/221' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/222' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/223' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/224' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/225' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/226' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/227' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/228' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/229' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/230' [152.00 MB] inherit
ACTIVE Snapshot '/dev/openvz/231' [152.00 MB] inherit
What can I do? Is it some limitation when snapshoting?
Info :
root@B03:/diplome# uname -r
2.6.16-026test014
Thank you
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-26 15:08 Problem when creating snashots The MoonSeeker
@ 2006-09-26 21:14 ` Jan Blunck
2006-09-27 9:51 ` The MoonSeeker
2006-09-27 10:03 ` Bernd Zeimetz
1 sibling, 1 reply; 9+ messages in thread
From: Jan Blunck @ 2006-09-26 21:14 UTC (permalink / raw)
To: device-mapper development
On Tue, Sep 26, The MoonSeeker wrote:
> I'd like to create many snaphot of an image but I've got when I
> attemp to create the 32th snapshot :
>
> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
> Rounding up size to full physical extent 152.00 MB
> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
> Failed to suspend origin vps-core
>
> I don't understand the error..
I'm not a native french speaker (hint!) but I assume you run out of
memory.
Yes there are limitations to the number of snapshots. For every single
snapshot we have to allocate memory for copying the chunks to the exception
store.
Do you really need that many snapshots at the same time?
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-26 21:14 ` Jan Blunck
@ 2006-09-27 9:51 ` The MoonSeeker
2006-09-27 10:36 ` Milan Broz
0 siblings, 1 reply; 9+ messages in thread
From: The MoonSeeker @ 2006-09-27 9:51 UTC (permalink / raw)
To: device-mapper development
Yes I really need it. I have to create a virtual network editor for
my diploma project. So I have found many virtual solutions but the
bestest for our project is OpenVZ. Unfortunatly, OpenVZ don't offer
the copy on write with his solution, after many tests, I have found a
solution based on LVM.
The main idea is to have a Virtual Private Server Core and lot of
Virtual Private Server who are a snapshot of the Virtual Server Core.
Now the problem is the limitation of VLM, I need more than 32 servers
(32 snapshots). Will this limitation incresed in futur futur released
of LVM? Or can we broke this limitation?
Have you a solution, it's relly urgent for me...
Thanks you
Le 26 sept. 06 à 23:14, Jan Blunck a écrit :
> On Tue, Sep 26, The MoonSeeker wrote:
>
>> I'd like to create many snaphot of an image but I've got when I
>> attemp to create the 32th snapshot :
>>
>> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
>> Rounding up size to full physical extent 152.00 MB
>> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
>> Failed to suspend origin vps-core
>>
>> I don't understand the error..
>
> I'm not a native french speaker (hint!) but I assume you run out of
> memory.
>
> Yes there are limitations to the number of snapshots. For every single
> snapshot we have to allocate memory for copying the chunks to the
> exception
> store.
>
> Do you really need that many snapshots at the same time?
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-27 9:51 ` The MoonSeeker
@ 2006-09-27 10:36 ` Milan Broz
2006-09-27 10:55 ` The MoonSeeker
0 siblings, 1 reply; 9+ messages in thread
From: Milan Broz @ 2006-09-27 10:36 UTC (permalink / raw)
To: device-mapper development
The problem with limited number of snapshots is caused by the using
big common mempool in dm-io module.
(This can happen even you have a lot of free memory...)
There are new dm-io patches which introduce new dm-io interface
(using private mempools) and solving this type of snapshot limitation.
Patches are currently in review and will probably change a bit,
but I hope it will in 2.6.19 kernel.
Milan
--
mbroz@redhat.com
The MoonSeeker napsal(a):
> Yes I really need it. I have to create a virtual network editor for my
> diploma project. So I have found many virtual solutions but the bestest
> for our project is OpenVZ. Unfortunatly, OpenVZ don't offer the copy on
> write with his solution, after many tests, I have found a solution based
> on LVM.
>
> The main idea is to have a Virtual Private Server Core and lot of
> Virtual Private Server who are a snapshot of the Virtual Server Core.
> Now the problem is the limitation of VLM, I need more than 32 servers
> (32 snapshots). Will this limitation incresed in futur futur released of
> LVM? Or can we broke this limitation?
>
> Have you a solution, it's relly urgent for me...
>
> Thanks you
>
>
> Le 26 sept. 06 à 23:14, Jan Blunck a écrit :
>
>> On Tue, Sep 26, The MoonSeeker wrote:
>>
>>> I'd like to create many snaphot of an image but I've got when I
>>> attemp to create the 32th snapshot :
>>>
>>> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
>>> Rounding up size to full physical extent 152.00 MB
>>> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
>>> Failed to suspend origin vps-core
>>>
>>> I don't understand the error..
>>
>> I'm not a native french speaker (hint!) but I assume you run out of
>> memory.
>>
>> Yes there are limitations to the number of snapshots. For every single
>> snapshot we have to allocate memory for copying the chunks to the
>> exception
>> store.
>>
>> Do you really need that many snapshots at the same time?
>>
>> --
>> dm-devel mailing list
>> dm-devel@redhat.com
>> https://www.redhat.com/mailman/listinfo/dm-devel
>
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-27 10:36 ` Milan Broz
@ 2006-09-27 10:55 ` The MoonSeeker
2006-09-27 11:45 ` Jan Blunck
2006-09-27 12:35 ` Milan Broz
0 siblings, 2 replies; 9+ messages in thread
From: The MoonSeeker @ 2006-09-27 10:55 UTC (permalink / raw)
To: device-mapper development
Where can I find this patch? I'd like to test it..
Le 27 sept. 06 à 12:36, Milan Broz a écrit :
> The problem with limited number of snapshots is caused by the using
> big common mempool in dm-io module.
> (This can happen even you have a lot of free memory...)
>
> There are new dm-io patches which introduce new dm-io interface
> (using private mempools) and solving this type of snapshot limitation.
>
> Patches are currently in review and will probably change a bit,
> but I hope it will in 2.6.19 kernel.
>
> Milan
>
> --
> mbroz@redhat.com
>
> The MoonSeeker napsal(a):
>> Yes I really need it. I have to create a virtual network editor
>> for my
>> diploma project. So I have found many virtual solutions but the
>> bestest
>> for our project is OpenVZ. Unfortunatly, OpenVZ don't offer the
>> copy on
>> write with his solution, after many tests, I have found a solution
>> based
>> on LVM.
>>
>> The main idea is to have a Virtual Private Server Core and lot of
>> Virtual Private Server who are a snapshot of the Virtual Server Core.
>> Now the problem is the limitation of VLM, I need more than 32 servers
>> (32 snapshots). Will this limitation incresed in futur futur
>> released of
>> LVM? Or can we broke this limitation?
>>
>> Have you a solution, it's relly urgent for me...
>>
>> Thanks you
>>
>>
>> Le 26 sept. 06 à 23:14, Jan Blunck a écrit :
>>
>>> On Tue, Sep 26, The MoonSeeker wrote:
>>>
>>>> I'd like to create many snaphot of an image but I've got when I
>>>> attemp to create the 32th snapshot :
>>>>
>>>> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
>>>> Rounding up size to full physical extent 152.00 MB
>>>> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
>>>> Failed to suspend origin vps-core
>>>>
>>>> I don't understand the error..
>>>
>>> I'm not a native french speaker (hint!) but I assume you run out of
>>> memory.
>>>
>>> Yes there are limitations to the number of snapshots. For every
>>> single
>>> snapshot we have to allocate memory for copying the chunks to the
>>> exception
>>> store.
>>>
>>> Do you really need that many snapshots at the same time?
>>>
>>> --
>>> dm-devel mailing list
>>> dm-devel@redhat.com
>>> https://www.redhat.com/mailman/listinfo/dm-devel
>>
>>
>> --
>> dm-devel mailing list
>> dm-devel@redhat.com
>> https://www.redhat.com/mailman/listinfo/dm-devel
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-27 10:55 ` The MoonSeeker
@ 2006-09-27 11:45 ` Jan Blunck
2006-09-27 12:35 ` Milan Broz
1 sibling, 0 replies; 9+ messages in thread
From: Jan Blunck @ 2006-09-27 11:45 UTC (permalink / raw)
To: device-mapper development
On Wed, Sep 27, The MoonSeeker wrote:
> Where can I find this patch? I'd like to test it..
>
Take a look at:
http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-27 10:55 ` The MoonSeeker
2006-09-27 11:45 ` Jan Blunck
@ 2006-09-27 12:35 ` Milan Broz
1 sibling, 0 replies; 9+ messages in thread
From: Milan Broz @ 2006-09-27 12:35 UTC (permalink / raw)
To: device-mapper development
The MoonSeeker napsal(a):
> Where can I find this patch? I'd like to test it..
>
Patches are in development quilt queue
http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/
related *testing* patches
dm-io-*.patch
dm-kcopyd-newio.patch
dm-exception-store-newio.patch
but depends probably on some patches in series file.
Note: there is no patch for new dm-io change in dm-raid1 & dm-log,
do *not* use these patches now if you are using mirror (raid1)
target !
(Remaining patches - including raid1 - are waiting in Alasdair's mail...)
Milan
--
mbroz@redhat.com
> Le 27 sept. 06 à 12:36, Milan Broz a écrit :
>
>> The problem with limited number of snapshots is caused by the using
>> big common mempool in dm-io module.
>> (This can happen even you have a lot of free memory...)
>>
>> There are new dm-io patches which introduce new dm-io interface
>> (using private mempools) and solving this type of snapshot limitation.
>>
>> Patches are currently in review and will probably change a bit,
>> but I hope it will in 2.6.19 kernel.
>>
>> Milan
>>
>> --
>> mbroz@redhat.com
>>
>> The MoonSeeker napsal(a):
>>> Yes I really need it. I have to create a virtual network editor for my
>>> diploma project. So I have found many virtual solutions but the bestest
>>> for our project is OpenVZ. Unfortunatly, OpenVZ don't offer the copy on
>>> write with his solution, after many tests, I have found a solution based
>>> on LVM.
>>>
>>> The main idea is to have a Virtual Private Server Core and lot of
>>> Virtual Private Server who are a snapshot of the Virtual Server Core.
>>> Now the problem is the limitation of VLM, I need more than 32 servers
>>> (32 snapshots). Will this limitation incresed in futur futur released of
>>> LVM? Or can we broke this limitation?
>>>
>>> Have you a solution, it's relly urgent for me...
>>>
>>> Thanks you
>>>
>>>
>>> Le 26 sept. 06 à 23:14, Jan Blunck a écrit :
>>>
>>>> On Tue, Sep 26, The MoonSeeker wrote:
>>>>
>>>>> I'd like to create many snaphot of an image but I've got when I
>>>>> attemp to create the 32th snapshot :
>>>>>
>>>>> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
>>>>> Rounding up size to full physical extent 152.00 MB
>>>>> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
>>>>> Failed to suspend origin vps-core
>>>>>
>>>>> I don't understand the error..
>>>>
>>>> I'm not a native french speaker (hint!) but I assume you run out of
>>>> memory.
>>>>
>>>> Yes there are limitations to the number of snapshots. For every single
>>>> snapshot we have to allocate memory for copying the chunks to the
>>>> exception
>>>> store.
>>>>
>>>> Do you really need that many snapshots at the same time?
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Problem when creating snashots
2006-09-26 15:08 Problem when creating snashots The MoonSeeker
2006-09-26 21:14 ` Jan Blunck
@ 2006-09-27 10:03 ` Bernd Zeimetz
2006-09-27 11:15 ` The MoonSeeker
1 sibling, 1 reply; 9+ messages in thread
From: Bernd Zeimetz @ 2006-09-27 10:03 UTC (permalink / raw)
To: device-mapper development
Hi,
>
> I'd like to create many snaphot of an image but I've got when I attemp
> to create the 32th snapshot :
>
> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core
> Rounding up size to full physical extent 152.00 MB
> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire
> Failed to suspend origin vps-core
do you probably run into the bug mentioned in
https://www.redhat.com/archives/dm-devel/2006-September/msg00058.html
Best regards,
Bernd Zeimetz
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2006-09-27 12:35 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-09-26 15:08 Problem when creating snashots The MoonSeeker
2006-09-26 21:14 ` Jan Blunck
2006-09-27 9:51 ` The MoonSeeker
2006-09-27 10:36 ` Milan Broz
2006-09-27 10:55 ` The MoonSeeker
2006-09-27 11:45 ` Jan Blunck
2006-09-27 12:35 ` Milan Broz
2006-09-27 10:03 ` Bernd Zeimetz
2006-09-27 11:15 ` The MoonSeeker
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