[Linux-cluster] urgenet question about ClusterSuit

[Daniel EPEE LEA]

On 1/3/06, gwood at dragonhold.org <gwood at dragonhold.org> wrote:
>
> > As I have studied mannuals of clustersuit , it seems
> > that there is only one service up in each
> > clustersystems , my question is we this high number of
> > users How can I rely just on one servers , I know that
> > another server in failoverdomain comesup incase of
> > first server failure , but what about load balancing?
> Load balancing is actually a totally different issue to the HA side of the
> cluster.  You are probably best using GFS to provide shared access to the
> SAN, and then just running local copies of the apps on each machine -
> since you don't want the applications to failover to other servers and
> instead just stay where they are.
>
> > I have studied about pirnaha for IP load balancing but
> > it seems that I can not use GFS with Pirnaha?
> Depending on budget & expertise within your company, I think it would
> probably be easiest to use a pair of hardware load balancers in this case
> - since that way you can get things like session affinity very easily.  If
> you'd rather stick with a Linux solution throughout, then piranha is
> probably the most appropriate (unless you want to just configure LVS
> yourself).
>
> I've only just quickly looked through the docs on the redhat site, and it
> looks like the piranha configuration can be totally separate to the
> application servers - the 'real' servers don't even need to be Linux if
> you need to run something else behind it... So using GFS/clustering on the
> application servers and piranha on the front end servers should work
> fine...
>
> However, you /might/ get better performance by using an active/passive
> configuration of machines attached to the SAN and other applications using
> NFS - depending on the usage of the data & locking performance of GFS
>
> (e.g. You could setup an HA NFS system using cluster suite and 2 nodes
> such that one shares out web pages and the other shares out mailboxes -
> but that they can each do both if the other fails.  Then all the
> application servers can mount the NFS share and use that with possibly
> faster response times)
>
> --
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>
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