I have a bad experience with NFS due to io-waits. I don't have probe GFS
but some good administrator friends talk to me it a good choice for your
problem.
El vie, 24-11-2006 a las 13:11 +0100, Antonio Guirado Puerta escribió:
> According our SAN partner, it is impossible mount a same volume
> with read/write permission in two machines. So it is necessary a
> middle level, based in network file systems (NFS, GFS, etc.). We know
> that there are installations with GFS but googling we found the
> following link:
>
> http://www.redhat.com/archives/linux-cluster/2005-September/msg00220.html
>
> Any good/bad experiences about GFS and QMAL? Is a good mix?
>
> Thanks.
>
>
>
> El vie, 24-11-2006 a las 02:34 -0800, Mihai Costache escribió:
> >
> > why you don't use a 2 identical qmail-ldap hosts ? and this two qmail hosts
> > behind f5 balancer ?
> >
> > and you have a single SAN partition ... and this partition is mounted on
> > each qmail-ldap machine (configuration of this qmail-ldap
> > hosts are identical)
> >
> > in this case the email are stock on the same SAN partition, regardless of
> > qmail-ldap hosts
> >
> > also the pop3 use the maildir on SAN partition regardless of qmail-ldap
> > hosts
> >
> >
> >
> >
> >
> > ----- Original Message ----
> > From: Antonio Guirado Puerta <antonio.guirado@f-integra.org>
> > To: qmail-ldap@qmail-ldap.org
> > Cc: carlos.garcia@f-integra.org
> > Sent: Thursday, November 23, 2006 12:17:50 PM
> > Subject: QMAIL CLUSTER with BACKUP
> >
> > Hello,
> >
> > We are evaluating qmail-ldap for an ISP installation.
> > We need a qmail cluster situated behind a F5 balancer.
> > We are going to distribute domains between two different
> > qmail instances situated in different machines (p.e mx1.domain.com
> > and mx2.domain.com).
> >
> > Maildirs are on a two SAN partitions. Each machine manages
> > its partition where maildirs associated to controlled domains are.
> >
> > 1. Both machines active.
> >
> > Qmail-LDAP-Cluster is interesting when both machines are up. Mailhost
> > attribute tell in which machine (mx1 or mx2) maildir is. If balancer
> > carries the session to a wrong qmail (where maildir is not mounted),
> > QMQP transfers SMTP/POP3/IMAP session to the right instance of qmail.
> > Notice that ldapclusterhost file can not have
> > both machine names (mx1.domain.com and mx2.domain.com) because
> > in that case, session is not transfer between qmail instances.
> >
> > 2. One machine is down.
> >
> > At this moment, both partitions are mounted on the active machine. So,
> > only one Qmail must manage all domains. Ldapclusterhost files should be
> > used in this moment. Now Ldapclusterhost should has mx1.domain.com and
> > mx2.domain.com.
> >
> >
> > We think that the same script that mount the partition in the active
> > machine, changes the content of Ldapclusterhost file. But I'd like to
> > ask if someone has a similar scenario or qmail-ldap-cluster let do a
> > backup cluster in an automatic way, using only control files.
> >
> > Thanks in advanced.
> > Regards.
> >
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