[cgl_discussion] Re: [Clusters_sig] A couple of questions

[Lars Marowsky-Bree]

On 2005-01-17T16:15:42, John Cherry <cherry at osdl.org> wrote:

> Cluster-aware Volume Management for Shared Storage
> 	evms?

Yes, both Linux HA and the (alas, proprietary) OES Novell Clustering
Services do support EVMS in cluster mode. The later one for up to 32
nodes, I'm told.

> Cluster File System
> 	OpenAIS - no
> 	Linux-ha - no

Wrong way to look at this I think, Linux HA is user-space only and thus
of course doesn't include a CFS, same as OpenAIS. They ain't aiming at
providing a full stack on their own.

Using OCFSv2 with Linux HA would address this, for example.

> Cluster-wide Log Collection
> 	???

syslog(-ng), evlog...

> SW Rolling Upgrades
> 	OpenAIS - ??
> 	Linux-ha - ??

Rolling upgrades and updates are supported with Linux HA for the cluster
software itself.


Sincerely,
    Lars Marowsky-Brée <lmb at suse.de>

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High Availability & Clustering
SUSE Labs, Research and Development
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