[Ocfs2-users] Linux OS Upgrade and OCFS

[Wu, Hai]

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