[Ocfs2-users] OCFS2 and upgrades

[Mark Fasheh]

On Fri, Dec 14, 2007 at 11:55:50AM -0600, Eric Ross wrote:
> * One was is running Ubuntu Dapper, and the other is running Ubuntu Gutsy 
> (upgraded from Dapper)
>
> * modinfo ocfs2 on both boxes lists version number: 1.3.3

What kernel versions are those machines running?


> My questions:
>
> * It's possible to mount an ocfs2 filesystem across a gutsy box and a 
> dapper box at the same time?

There's a network protocol version which occasionally gets bumped if there's
protocl-related bug fixes or new features added. So long as your two Ocfs2
versions speak the same protocol, you should be fine. If they speak
different ones, you'll get a message to the console indicating so when the
2nd node fails to mount.

The other thing that may prevent a mount is if heartbeat/network timeouts
are different on the nodes, but that's easily fixed by just setting the
timeouts consistently accross the cluster.


> * Will an on disk format upgrade that needs to take place?

The only time you should ever have to upgrade your disk format is to get
access to new features. All new versions of Ocfs2 know how to read and write
all old versions of the disk format.
	--Mark

--
Mark Fasheh
Senior Software Developer, Oracle
mark.fasheh at oracle.com