[Ocfs2-users] Re: OCF2 and LVM

Mon Oct 8 12:12:18 PDT 2007

We use EMC's BCV for OCFS2 split mirror and it works just fine (10.2.0.3
and RH Linux 4). The only problem is we can't backup to tape directly
from ocfs2 (we are using legato and I haven't heard of any other third
party s/w doing this without rman). So, we copy files to ext3, zip them
and then take tape backup.

Thanks, 
Shiva Kambalimath

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Today's Topics:

   1. OCF2 and LVM (Riccardo Paganini)
   2. Re: OCF2 and LVM (Jordi Prats)
   3. Re: OCF2 and LVM (Alexei_Roudnev)

----------------------------------------------------------------------

Message: 1
Date: Mon, 08 Oct 2007 12:35:54 +0200
From: "Riccardo Paganini" <riccardo.paganini at solveit.it>
Subject: [Ocfs2-users] OCF2 and LVM
To: ocfs2-users at oss.oracle.com
Message-ID: <web-571788 at solveit.it>
Content-Type: text/plain;charset="iso-8859-1";format="flowed"

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

------------------------------

Message: 2
Date: Mon, 08 Oct 2007 20:20:08 +0200
From: Jordi Prats <jprats at cesca.es>
Subject: Re: [Ocfs2-users] OCF2 and LVM
To: Riccardo Paganini <riccardo.paganini at solveit.it>
Cc: ocfs2-users at oss.oracle.com
Message-ID: <470A74D8.9090702 at cesca.es>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

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
> 
> 

------------------------------

Message: 3
Date: Mon, 8 Oct 2007 11:49:29 -0700
From: "Alexei_Roudnev" <Alexei_Roudnev at exigengroup.com>
Subject: Re: [Ocfs2-users] OCF2 and LVM
To: "Jordi Prats" <jprats at cesca.es>,	"Riccardo Paganini"
	<riccardo.paganini at solveit.it>
Cc: ocfs2-users at oss.oracle.com
Message-ID: <069101c809db$f5540070$7031a8c0 at exigengroup.com>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=response

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
> 

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