topic Re: Service Guard Linux Cluster type in Operating System - Linux

Service Guard Linux Cluster type

Pierre Marie Kingne — Fri, 11 Sep 2009 08:36:35 GMT

Hello All,

As we usaually said that Microsoft cluster is a shared nothing cluster model, can we confirm that HP ServiceGuard Linux is a shared Disk cluster model?

Re: Service Guard Linux Cluster type

Matti_Kurkela — Fri, 11 Sep 2009 09:11:39 GMT

Not really. With basic ServiceGuard, any cluster disk resource can be used by one node at a time only. The default cluster mode is shared-nothing.

You can optionally use a cluster filesystem like OCFS2 with ServiceGuard: in this case, the result can be a shared-disk cluster. Such a configuration has more complicated requirements than a basic ServiceGuard setup.

Not all cluster filesystems available for Linux are integrated with ServiceGuard, so you may end up with two separate clustering systems co-existing on the same set of cluster nodes.

The docs.hp.com website has some whitepapers about such implementations in the High Availability -> ServiceGuard for Linux section.

MK

Re: Service Guard Linux Cluster type

Emil Velez — Sat, 12 Sep 2009 00:15:02 GMT

if you want a cluster file system option for Linux consider Polyserve. It provides application clustering with VIPs and services and a cluster file system.

Re: Service Guard Linux Cluster type

Pierre Marie Kingne — Sat, 12 Sep 2009 13:05:37 GMT

I got it I wanted to confirm that the default Cluster mode for Service Guard Linux is shared nothing.