[Linux-cluster] New features/architecture ?

[Kovacs, Corey J.]

David, thanks for the reply. I've seen the post below and in fact it is what
prompted the question. Just seems like there is a lot going underneath that
I was missing. I was hoping for a more nuts and bolts bag of information
with respect to the changes being made across the board.

This is a good start though and I'll take a look.


Thanks


Corey 

-----Original Message-----
From: David Teigland [mailto:teigland at redhat.com] 
Sent: Thursday, April 20, 2006 11:33 AM
To: Kovacs, Corey J.
Cc: linux clustering
Subject: Re: [Linux-cluster] New features/architecture ?

On Thu, Apr 20, 2006 at 07:46:24AM -0400, Kovacs, Corey J. wrote:
> I've worked with GFS 6 and 6.1 quite a bit lately and in reading the 
> posts over the last few months, I see a lot of references to gfs2. I'm 
> not quite sure where it sits in the grand scheme of things other than 
> it's the next big itteration of gfs as a whole and attepmpts are being 
> made to mearge it into the kernel.
> 
> This post has some good info, but not much in the way of specifics 
> http://lwn.net/Articles/150652/
> 
> *	GFS2 - an improved version of GFS, not on-disk compatible 
> *	DLM - an improved version of DLM 
> *	CMAN - a new version of CMAN, based on OpenAIS
> <http://developer.osdl.org/dev/openais/>  
> *	CLVM - will allow more LVM2 features to be used in the cluster
> 
> These seem to be all there is as far as a "roadmap" and the OpenAIS 
> link doesn't seem all that descriptive unless one is a developer.
> 
> Is there some point of reference which describes the changes between 
> whats already released and what is planned? For instance, a post 
> recently mentioned adding openais interfaces/functionality.

For GFS2 and DLM it's largely performance improvements.  For clustering
infrastructure a ton of stuff moved out of the kernel and now runs in user
space, with openais at the center.  The user isn't exposed to much of the
infrastructure so there's not much user-visible change to speak about.

Patrick recently sent this out:
https://www.redhat.com/archives/linux-cluster/2006-April/msg00126.html

Dave