Re: linux cluster
On Sat, 2003-08-09 at 03:19, Alvin Oga wrote:
> hi ya
>
> On Sat, 9 Aug 2003, Nyc0n wrote:
>
> > What is a linux cluster and what does it do? I have 3 linux servers that
> > I could cluster together, but what is the benefit? What would I actually
> > gain by clustering? I mean technically speaking they are in a cluster
> > right now, they are clustered all over my room..lol
>
> you have "ha" clusters and "compute" clusters
[snip]
> - ha cluster -- if one machine fails, the remaining servers can take
> over and nobody will notice the dead "www" server
> - you can do the same with a good backup scheme but if a system
> dies, you have to change a backup machine called "www.backup" to
> become the new "www machine" to make it go live after a failure
> ( can be good or bad to do things manually .. pov ... )
That's so limiting. A Real Cluster[1] will allow all nodes to access
all files at the same time. Linux/Unix has no transparent way to
do this, except, partially, GFS and OpenGFS.
[1] Yes, I use VMSclusters on a daily basis. Very useful, totally
transparent, extremely expensive...
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