Ocfs2 users - Mar 2012 - OCFS2 1.2/1.6

We are in the process of migrating to new database servers.  Our current
RAC clusters are running OCFS2 1.2.9 on RHEL 4.  Our new servers are
running OCFS2 1.6 OEL5.  If possible, we would like to minimize the
amount of data that needs to move as we migrate to the new servers.  We
have the following questions:

 

1.      Can we mount an existing OCFS2 1.2 volume on a servers running
OCFS2 1.6?

2.      Are there any negative implications of being in a mixed mode? 

3.      If we need to add a OCFS2 1.6 volume to increase a tablespace
size, can we have one datafile be OCFS2 1.2 and another

be OCFS2 1.6 for the same tablespace?

4.      Can we use OCFS2 1.6 features against an OCFS2 1.2 volume
mounted on OCFS2 1.6?

 

Thank you,

Nancy

 

  <http://www.suny.edu/> 

Nancy Maki
Manager of Database Services

Office of Information & Technology
The State University of New York 
State University Plaza - Albany, New York 12246 
Tel: 518.320.1213   Fax: 518.320.1550

eMail:  Nancy.Maki at suny.edu
Be a part of Generation SUNY: Facebook
<http://www.facebook.com/generationsuny>  - Twitter
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<http://www.youtube.com/generationsuny> 

 

 

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The file system on-disk image has not changed. So the 1.6 file system
software can mount the volume created with 1.2 mkfs. What you cannot do
is concurrently mount the same volume with nodes running 1.2 and 1.6 
versions of the file system software.

It is not mixed mode. The 1.6 fs software will read the on-disk features
on the 1.2 volume and limit the functioning on that volume to just that.
Perfectly normal.

Yes, you can add the tablespace on the 1.2 volume.

For the 1.2 volume to be able to use 1.6 features, the said features
will have to be enabled. Once you do enable those features, the volume
will not be mountable on the older RHEL4 boxes unless those features
are disabled. There is a whole section in the users' guide that explains
this in more detail.

On 03/02/2012 08:09 AM, Maki, Nancy wrote:
> We are in the process of migrating to new database servers. Our current
> RAC clusters are running OCFS2 1.2.9 on RHEL 4. Our new servers are
> running OCFS2 1.6 OEL5. If possible, we would like to minimize the
> amount of data that needs to move as we migrate to the new servers. We
> have the following questions:
>
> 1.Can we mount an existing OCFS2 1.2 volume on a servers running OCFS2 1.6?
>
> 2.Are there any negative implications of being in a mixed mode?
>
> 3.If we need to add a OCFS2 1.6 volume to increase a tablespace size,
> can we have one datafile be OCFS2 1.2 and another
>
> be OCFS2 1.6 for the same tablespace?
>
> 4.Can we use OCFS2 1.6 features against an OCFS2 1.2 volume mounted on
> OCFS2 1.6?
>
> Thank you,
>
> Nancy
>
> circle <http://www.suny.edu/>**
>
> 	
>
> *Nancy Maki*
> /Manager of Database Services/
>
> Office of Information & Technology
> The State University of New York
> State University Plaza - Albany, New York 12246
> Tel: 518.320.1213 Fax: 518.320.1550
>
> eMail: Nancy.Maki at suny.edu
> */Be a part of Generation SUNY: /**/Facebook/*
> <http://www.facebook.com/generationsuny>*/- /**/Twitter/*
> <http://www.twitter.com/generationsuny>*/- /**/YouTube/*
> <http://www.youtube.com/generationsuny>
>
>
>
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