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Date:      Wed, 31 Oct 2007 23:16:44 +1100 (EST)
From:      Peter Ross <Peter.Ross@alumni.tu-berlin.de>
To:        Jordi Prats <jprats@cesca.es>
Cc:        freebsd-cluster@freebsd.org
Subject:   Re: HA cluster
Message-ID:  <20071031222808.V1141@klein.bigpond.com>
In-Reply-To: <4727BDD6.8060105@cesca.es>
References:  <4727BDD6.8060105@cesca.es>

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Hi Jordi,

On Wed, 31 Oct 2007, Jordi Prats wrote:

> Currently I have two (redundant) load balancers with LVS,

I checked the Website.. the most of them are on application level so they 
should be available under FreeBSD as well.

E.g. I have a Red Hat szenario with Apache as the loadbalancer and 
clustered tomcat 6.0 behind. A developer has the same setup at a FreebSD-7 
box and tests it there.

> and several NFS,

I believe the Red Had Cluster uses GFS to have concurrent r/w access to 
the SAN?

I try to imagine to use FreeBSD stuff as gmirror, ZFS, iscsi, CARP etc... 
it all does not sum up to something similiar - but it may be my lack of 
imagination only.

NFSv4 is designed to support for replication and migration but I have no 
idea about the FreeBSD implementation status. I just find this old status 
report: 
http://www.freebsd.org/news/status/report-2006-01-2006-03.html#FreeBSD-NFS-Status-Report

"FreeBSD NFSv4 server is pretty stable now and available via anonymous 
ftp. NFSv4.1 features are not a part of it yet and are not likely to 
happen until at least the end of 2006. Contact 
rick@snowhite.cis.uoguelph.ca for details."

The sources for current only contains code for a NFSv4 client.

To be fair I do not know about the Linux implematation either. A document 
last updated in March 
(http://wiki.linux-nfs.org/wiki/index.php/Server_state) predicts this 
implemented in 2.6.19. We have 2.6.23 by now but I cannot find it in the 
kernel changelogs..

> MySQL and PostgreSQL servers using RedHat cluster suite.

As already pointed out there are replication solutions for postgresql and 
MySQL - they should work under FreeBSD in the same way as for Linux.

Regards
Peter



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