From: Martin Mailand <martin@tuxadero.com>
To: Sage Weil <sage@newdream.net>
Cc: ceph-devel@vger.kernel.org
Subject: Re: rbd snap
Date: Fri, 23 Sep 2011 20:48:03 +0200 [thread overview]
Message-ID: <4E7CD463.9000303@tuxadero.com> (raw)
In-Reply-To: <Pine.LNX.4.64.1109231120360.8231@cobra.newdream.net>
Hi,
that's great, and it is safe to start diffrent vms with diffrent
snapshots of the same image at the same time?
Best Regards,
Martin
Sage Weil schrieb:
> On Fri, 23 Sep 2011, Martin Mailand wrote:
>> Hi,
>> is it possible to access snapshots without to rollback the head of the rbd
>> volumen?
>> Because I want to do a snapshot of a vm running via librbd and qemu, and use
>> the snapshot to make a offsite backup of the vm.
>
> $ rbd export foo --snap=mysnap /path/to/foo.dump
>
> You can also map the snapshot via qemu with a string like
> rbd:rbd/foo@mysnap.
>
> sage
>
>
>> Best Regards,
>> Martin
>>
>>
>> Martin Mailand schrieb:
>>> Okay, with the btrfs patch and the right commandline snapshotting works like
>>> a charm.
>>>
>>> best regards,
>>> martin
>>>
>>> Josh Durgin schrieb:
>>>> On 09/16/2011 02:32 PM, Martin Mailand wrote:
>>>>> root@c-brick-001:~# rbd rm --snap=2011091601 test
>>>>> *** Caught signal (Segmentation fault) **
>>>>> in thread 0x7f203d749740
>>>>> ceph version 0.34 (commit:2f039eeeb745622b866d80feda7afa055e15f6d6)
>>>>> 1: rbd() [0x457062]
>>>>> 2: (()+0xfc60) [0x7f203ccf6c60]
>>>>> 3: (librbd::snap_set(librbd::ImageCtx*, char const*)+0x10)
>>>>> [0x7f203d32ecd0]
>>>>> 4: (main()+0x59f) [0x4518ff]
>>>>> 5: (__libc_start_main()+0xff) [0x7f203b6cdeff]
>>>>> 6: rbd() [0x44d569]
>>>>> Segmentation fault
>>>> I added a bug to the tracker for this
>>>> (http://tracker.newdream.net/issues/1545). It shouldn't crash the way you
>>>> ran it, but if you're trying to remove a snapshot you need to use the
>>>> 'snap rm' command, i.e.:
>>>> $ rbd snap rm --snap=2011091601 test
>>>> --
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>>
next prev parent reply other threads:[~2011-09-23 18:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-16 14:45 rbd snap Martin Mailand
2011-09-16 16:30 ` Sage Weil
2011-09-16 21:32 ` Martin Mailand
2011-09-16 22:23 ` Josh Durgin
2011-09-16 22:36 ` Martin Mailand
2011-09-17 16:09 ` Martin Mailand
2011-09-23 18:08 ` Martin Mailand
2011-09-23 18:21 ` Sage Weil
2011-09-23 18:48 ` Martin Mailand [this message]
2011-09-23 18:52 ` Sage Weil
2011-09-23 18:25 ` Josh Durgin
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