[Gluster-devel] LVM

[Gordan Bobic]

Assuming the underlying FS itself is consistent (which is by no means 
guaranteed in snapshotting!), the out of data volume would eventually 
get up to date through use.

Gordan

Onyx wrote:
> Hmm, yes, what was I thinking....
> 
> But if I want to use LVM snapshots underneath glusterfs volumes (on 
> different bricks) who are then unified or afr'd,  won't there be a 
> problem because the snapshots aren't taken at exactly the same time? Or 
> what would be the expected behavior if I for example roll back one 
> volume in an afr setup and not the other?
> 
> 
> 
> 
> 
> Anand Babu Periasamy wrote:
>>
>> -- 
>> Anand Babu Periasamy
>> GPG Key ID: 0x62E15A31
>> Blog [http://ab.freeshell.org]
>> The GNU Operating System [http://www.gnu.org]
>> Z RESEARCH Inc [http://www.zresearch.com]
>>
>> Hi Onyx,
>> GlusterFS volumes are file based. LVM requires block based
>> store. You cannot have LVM over GlusterFS. I am assuming
>> you are asking about GlusterFS over LVM. You can use LVM and
>> its snapshotting ability underneath the GlusterFS posix volume.
>> It will work transparently.
>>
>> -- 
>> Anand Babu Periasamy
>> GPG Key ID: 0x62E15A31
>> Blog [http://ab.freeshell.org]
>> The GNU Operating System [http://www.gnu.org]
>> Z RESEARCH Inc [http://www.zresearch.com]
>>
>>
>>
>> Onyx wrote:
>>> Has anyone ever tested LVM on top of a glusterfs volume? Would this 
>>> even be possible?
>>> I'm interested because of the snapshot feature of LVM.
>>>
>>> Thanks!
>>>
>>>
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> 
> 
> 
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