[Ocfs2-users] OCF2 and LVM

[Jordi Prats]

Hi,
You could use clvm (cluster LVM): 
http://sources.redhat.com/cluster/clvm/ to do snapshots on a clustered 
environment.

You need to setup the RedHat cluster infrastructure, but this shouldn't 
be a problem.

I agree that rman is the correct solution to oracle backups :)

regards,
Jordi

Alexei_Roudnev wrote:
> I dont knoiw any lvm technology which can make a snapshort in clustered 
> environment, so better forget this idea.
> 
> Recommended method to do oracle backups is rman. Any violation of this 
> brings you into the swamp of possible oracle bugs.
> 
> 
> ----- Original Message ----- From: "Jordi Prats" <jprats at cesca.es>
> To: "Riccardo Paganini" <riccardo.paganini at solveit.it>
> Cc: <ocfs2-users at oss.oracle.com>
> Sent: Monday, October 08, 2007 11:20 AM
> Subject: Re: [Ocfs2-users] OCF2 and LVM
> 
> 
>> Hi,
>> I'm not an expert on oracle, but I don't think using a snapshot is a 
>> recommended backup solution. You should use data pump or exp utilities 
>> to backup your database.
>>
>> To extend your fs, tune2fs.ocfs2 requires you to umount it, according 
>> to it's man page:
>>
>> ==
>> tunefs.ocfs2 is used to adjust OCFS2 file system parameters on  disk. 
>> In order to prevent data  loss,  tunefs.ocfs2  will not  perform any 
>> action on the specified device if it is mounted on any node in the 
>> cluster.  This tool requires the O2CB cluster to be online.
>> ==
>>
>> The concrete command should be: tune2fs.ocfs2 -S /dev/LVM_volume
>>
>> I don't know if there's any way to extend it without umounting it.
>>
>> If you want to extend your fs without umounting it you should use ASM 
>> instead of OCFS2.
>>
>> regards,
>> Jordi
>>
>> Riccardo Paganini wrote:
>>> Does anybody knows if is there a certified procedure in to backup a 
>>> RAC DB 10.2.0.3 based on OCFS2 ,
>>> via split mirror or snaphots technology ?
>>>
>>>
>>> Using Linux LVM and OCFS2, does anybody knows if is possible to 
>>> dinamically extend an OCFS filesystem,
>>> once the underlying LVM Volume has been extended ?
>>>
>>> Thanks in advance
>>> Riccardo Paganini
>>>
>>> _______________________________________________
>>> Ocfs2-users mailing list
>>> Ocfs2-users at oss.oracle.com
>>> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>>>
>>>
>>
>> _______________________________________________
>> Ocfs2-users mailing list
>> Ocfs2-users at oss.oracle.com
>> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>>
> 
> 
>