[Ocfs2-users] Linux OS Upgrade and OCFS

[Sunil Mushran]

Not a good idea to change so many components in one sweep. Better to
break it into smaller steps.

One suggestion could be to first upgrade from 10gR1 to 10gR2 on EL3
itself. This should require some downtime.

Next upgrade one node to el4.

Next you have to first think about your storage. Do you have spare
capacity on your array? While we provide tools to read ocfs (release 1)
volumes on el4, you will require additional disk space to store that data.

Once the data is copied over, you can take replay the new archive logs to
keep the new db current. (Advantage of upgrading the db first.)

Lastly, this is not the right forum for db related qs. Ping Oracle
Support directly.

Wu, Hai wrote:
> We are thinking of upgrade RHEL 3 to RHEL4, since RHEL 3 support is
> going to end in 2010. Our Oracle10g 10.1.0.4.2 RAC is based on RHEL 3,
> OCFS1. 
>
> The problem with the upgrade is OCFS1 is only supported in RHEL3, and
> OCFS2 is only supported in RHEL4.
>
> What's the best plan to upgrade from RHEL 3 to RHEL 4 in this case? (I
> thought about removing one node from current RAC, getting rid of
> everything on this node, reinstall RHEL4/clusterware/Oracle software on
> it, then rejoin this node into the RAC, but I guess OCFS1 might not work
> in RHEL4, right?)
>
> One possible plan is as follows: 
> 1. Remove one node from RAC, remove this node from all client
> configuration. Install RHEL4/clusterware/Oracle DB software (could be
> 10gR2 instead of 10gR1) on this node (with complete new sets of SAN
> LUNs, but same database instance/service names). Migrate/Import all
> Oracle DB data into this new RAC. 
> 2. Do the same thing for some other RAC nodes, and joining them into
> this new RAC. 
> 3. Pointing all RAC clients to use this new RAC. 
> 4. Do the same thing from all remaining RAC nodes, and joining them into
> this new RAC.
>
> It's going to be painful, but it seems to be the only way. 
>
> Any suggestions?
>
> Thanks,
> Hai
>
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