Re: Compaq launches Open SSI Cluster Projects

[Bruce Walker <bruce@kahuna.cag.cpqcorp.net>]

David,

> They -have- developed in a linux vacuum; this is the Tandem/NonStop/SCO
> Unix cluster stuff, pretty much as deployed on that platform.

As with any significant contribution to Linux, we started with
something (didn't GFS, DLM, failsafe and many others start that way?).
We are open sourcing the complete NonStop Cluster technology.
Our goal is allow the community to leverage that technology, along
with other open source technology (GFS, LVS, DLM, failsafe, etc.) to
build the best clustering product around.
> 
> Personally, I am more interested in the CI part of the project, which
> along with the IBM DLM would provide a reasonable GFS platform.  It seems
> it would get together faster than GFS-on-DLM-on-heartbeat would.

We broke apart the CI components specifically for this need.  Because
IBM only released a small subset of their clustering, the DLM did not
have a sufficiently rich membership service to layer on.  We felt we
had something they (and thus the community) could use.

> 
> I'm less into in the very-large scope SSI work, maybe because I don't 
> understand the implications of the failure domains.  It has appeared to me
> before that failure of a node is likely to have deeper ripples in the SSI 
> scheme than it does in clusters with less tightly coupled nodes.  And it
> is all very intrusive in ways one wonders if Linus would ever accept.  Its
> a noble attempt, but it's gonna be a lot harder to accept.
> 
> In a perfect world, many of the components would plug together; I don't know
> how the CI stuff maps into the heartbeat model.
> 
> -dB
> 
> Alan Robertson wrote:
> > 
> > Greg Freemyer wrote:
> > 
> > > you seem to have been developing this in a vacuum from the Linux communities
> > > perspective.
> > >
> > > The only Linux technology I see in the presentation is GFS.
> > >
> > > Are there any other pre-existing Linux HA/HP cluster technologies you are
> > > incorporating?
> > 
> > Hi Greg,
> > 
> > We've certainly encouraged them to work together with us to make their
> > software fit into the planned community clustering infrastructure project.
> > This would be of benefit to them, to the Linux community, and to potential
> > users of clustering infrastructure.
> > 
> > We're still waiting to hear if they're interested.
> 
> Linux-cluster: generic cluster infrastructure for Linux
> Archive:       http://mail.nl.linux.org/linux-cluster/


Linux-cluster: generic cluster infrastructure for Linux
Archive:       http://mail.nl.linux.org/linux-cluster/