[Linuxha-users] OpenMosix

[Simon Edwards]

Hi Curtis,
	Thanks for the email. Getting linuxha.net to work more easily is my
number one aim at present (and will be for V2 which is in the early
prototype stage).

	I must concur with Michael on this one ... by load balancing you are
talking about processes migrating between nodes - but DRBD only allows a
single node write access to any particular file system ... so the two do
not really marry well.

	What you really need is a clustered file system rather than a
replicated one - GFS for example - but these rely on dual-attached
SCSI/iSCSI/Fibre Channel storage and have a single point of failure -
the storage in question!
	
	One avenue I intend to explore in the new year however is Xen3 and
linuxha.net - it might be possible to move virtual cluster nodes between
machines - though the IP configurations might be the only sticking point
- I need to investigate more and see. If moving cluster nodes does work
- then you could implement load balancing to move nodes - where each
node is running a single application.  Of course not as fine-grained as
OpenMosix but still might be useful.

Regards,
Simon.

	

On Fri, 2005-12-16 at 07:58 +1000, Michael Mansour wrote:
> Hi Curtis,
> 
> > I've setup a drbd cluster in the past -- we were clustering samba 
> > and a qmail installation and getting it all working initially was a 
> > bear, but once we had it running it was great.
> > 
> > The work that you've done has made this so much easier and the
> > documentation is fantastic.
> > Kudos..
> > 
> > I would like to setup a combination of OpenMosix and linuxha 
> > cluster.. to get the benefits of high availability and process load balancing.
> > 
> > I was wondering if anyone has had successful experience getting both
> > working --drbd and openmosix.
> > 
> > I've noticed there is a version of openmosix that has been setup on centos4
> > http://openmosix.eng.ua.edu  .. and I might give it a try.
> > 
> > Any suggestions or recommendations would be welcomed.
> 
> I'd like to advise but I'm interested to know exactly what you're looking for
> (or trying to do) with your cluster software. 
> 
> linuxha.net is software which allows you to have HA failover between two
> nodes, using floating IPs and drbd as the shared storage device. OpenMosix is
> specifically for SSI.
> 
> With a combination of these two? I'm trying to understand your application
> and/or requirement.
> 
> Michael.
> 
> 
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