On Thu, Jan 28, 2010 at 06:13:33PM +0100, Stefan Foerster wrote:

> If in a mail cluster, with multiple machines having access to a shared
> storage device (SAN, iSCSI) which is presented to the host as a normal
> block device (e.g. /dev/sda, hosting a normal ext3 filesystem), one of
> the mail nodes fails, what are the necessary Postfix steps to take
> over the queue on another host?
> 
> I _think_ it is sufficient to provide the same configuration files as
> on the node which failed,

If path names for the queue, data and configuration directory are different,
you may need to adjust these in the config files.

> execute "postsuper -s" until the queue file
> names stop changing (which shouldn't happen at all, because it is the
> same physical filesystem)

Only needed when restoring from backups, copying queue files, ... Not
needed when mounting a filesystem.

> What would happen to mails which weren't completely received when the
> original node crashed? Can I prevent qmgr from trying to deliver
> those?

Nothing needs to be done.

> Do I have to?

No.

-- 
        Viktor.

P.S. Morgan Stanley is looking for a New York City based, Senior Unix
system/email administrator to architect and sustain our perimeter email
environment.  If you are interested, please drop me a note.

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