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Re: [Linux-cluster] GFS upgrade questions



On Thu, 18 Dec 2008, Diego Liziero wrote:

On Thu, Dec 18, 2008 at 12:18 PM, Fabio M. Di Nitto <fdinitto redhat com> wrote:

If you are running RHEL or CentOS, you have no reason to upgrade.

the RHEL packages and the STABLE2 branch (cluster-2.03.xx) receives the same
set of bug fixes.

The main (and only) difference are the kernel modules. What comes with
RHEL/CentOS is built for that kernel/release combination while
cluster-2.03.xx follow upstream kernels (2.6.27 at this point in time).

Upgrading from what CentOS/RHEL to corosync/cluster-3.0.0.alpha1 has the
same problematics as described before.

Fabio

Thanks Fabio for your clear explanation.

I was thinking about this upgrade just to see if the "two nodes" case
was better handled.

Here first we had to add a quorum disk, and despite this, we were
still having some troubles when rebooting (done with a reboot command
from a shell):
rgmanager waiting forever while stopping, services not migrating to
the second node, fencing not starting when the other node is powered
off (clean_start="1" and power fencing)...

Adding a third node _seems_ to have solved most of them, though.

A lot of work has been done to fix the two node case. The code is in RHEL53 branch already and it will be part of the next RHEL update. Yes the same code is already in the stable2 and stable3 branch.

My strong recommendation is to be patience and use the official updates when available. Unless you are running a test cluster, I generally discourage people to use manually built packages for production.

Fabio

--
I'm going to make him an offer he can't refuse.


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