Re: Shared queue directory & pid for 2 postfix

Hello Nick,

nick wrote:
>
> Did you guys look at DRBD before deciding on NFS?
>
> Not trying to teach my grandmother to suck eggs, I'm just curious..
>

We have (and are using) DRBD, but disk is also NFS4 RW shared.

I shoud not be wrong telling DRBD only allows to duplicate each written
data on a disk onto another UN-mounted disk. In no case it solves the
need for RW shared space we have.

For example the mailboxes of our users need to be accessed via NFS
because even if when modified it is DRBD'ed on a disk onto the other
realserver, this one could not mount it RW for appending its own
received emails or allow users to retrieve their box.

So each RS have a /USERS disk, one RS is the primary node, primary DRBD,
its /USERS disk is locally mounted and it duplicates its data onto the
secondary node via DRBD. The secondary RS does not have its /USERS disk
mounted (because DRBD'ed) but mount /USERS via NF4 on the primary RS.
In case of a crash, the secondary can carry on stopping NFS and
remounting its (surely up-to-date thanks to DRBD) own local /USERS disk.

Thanks for the idea, and do not mind beeing curious, I am one of those
considering it is (almost always) a very good thing :-)

Regards,

Laurent.

--
################################################## ###########
# Laurent Neiger | Centre Reseau & Informatique Commun #
# | Tel. : (0033) (0)4 76 88 79 91 #
# | Fax : (0033) (0)4 76 88 12 95 #
# | Web : http://cric.grenoble.cnrs.fr #
# CNRS Grenoble | mailto:Laurent.Neiger@grenoble.cnrs.fr #
################################################## ###########