[cgl_discussion] Re: [dcl_discussion] Cluster summit materials

Lars Marowsky-Bree lmb at suse.de
Tue Aug 10 13:58:17 PDT 2004

On 2004-08-10T13:49:26,
   John Cherry <cherry at osdl.org> said:

Hi John, minor correction here...
> This is a work in progress since Daniel Phillips is continuing to add
> The time was right to consider common clusters components.  While we
> expected a fair amount of contention at the meetings, it was good to see
> a fairly unanimous desire to identify common components that could be
> leveraged over the various cluster implementations and to drive these
> common components to mainline acceptance.  The common cluster components
> identified at the summit were...
>    cman - cluster manager (membership/quorum/heartbeat, recovery
>           control.
>    fence - userland daemon which decides which nodes need fencing
>    dlm - fully distributed, fully symmetrical lock manager
>    gfs - clustered filesystem
> While these common components all have RHAT/Sistina roots, these
> components are in the best position for mainline acceptance.  As APIs
> are defined for these services, other implementations could also be used
> (the vfs model).

This isn't quite true. cman as a whole is not quite in the best position
for mainline acceptance; actually, most isn't.

However, what was identified was that the following components

- membership
- Fencing

would be the best ones to work on merging first, but it was acknowledged
that there's quite some work left for these to be done, in particular on
the API and the conceptual model behind it.

    Lars Marowsky-Brée <lmb at suse.de>

High Availability & Clustering	    \ Philosophy proclaiming reason to be 
SUSE Labs, Research and Development | the supreme human virtue is falling
SUSE LINUX AG - A Novell company    \ pray to self-adulation.

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