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RE: [Linux-cluster] New features/architecture ?

Whats y'alls take on OCFS2 which is in the 2.6 kernel tree? 


-----Original Message-----
From: linux-cluster-bounces redhat com
[mailto:linux-cluster-bounces redhat com] On Behalf Of Kovacs, Corey J.
Sent: Thursday, April 20, 2006 8:46 AM
To: David Teigland
Cc: linux clustering
Subject: RE: [Linux-cluster] New features/architecture ?

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

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



-----Original Message-----
From: David Teigland [mailto:teigland 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

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