[Cluster-devel] Magma; Magma-plugins

[Cluster-devel] Magma; Magma-plugins

[Zelikov_Mikhail]

I was looking for any documentation on Magma API or any Red Hat cluster
suite API. So far I was only able to find a man page on clu_connect,
clu_disconnect and clu_get_event. However there many more defined in magma.h
and magma-build.h. It also looks like there is a draft version of Magma man
page at the end of magma.h. 
I am interested in writing a cluster aware application as well as defining
my own cluster resource.
Any help would be really appreciated.
     Thank you,
     Mike

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[Cluster-devel] Magma; Magma-plugins

[David Teigland]

On Thu, Aug 10, 2006 at 04:04:11PM -0400, Zelikov_Mikhail at emc.com wrote:
> I was looking for any documentation on Magma API or any Red Hat cluster
> suite API.

Magma was only a temporary lib used in RHEL4, we're not using it any
longer.  You should look at libcman or any of the other libraries
available in openais, http://developer.osdl.org/dev/openais/

Dave

[Cluster-devel] Magma; Magma-plugins

[Lon Hohberger]

On Thu, 2006-08-10 at 16:04 -0400, Zelikov_Mikhail at emc.com wrote:
> I was looking for any documentation on Magma API or any Red Hat
> cluster suite API. So far I was only able to find a man page on
> clu_connect, clu_disconnect and clu_get_event. However there many more
> defined in magma.h and magma-build.h. It also looks like there is a
> draft version of Magma man page at the end of magma.h. 
> I am interested in writing a cluster aware application as well as
> defining my own cluster resource.
> Any help would be really appreciated.
>      Thank you,
>      Mike

There really isn't much.

Originally, it was used to provide an API which worked on CMAN and GuLM
clusters.  We've since decided that we did not need two infrastructures,
so we no longer have Magma (in -head; it's still in STABLE and RHEL4
branches).

You should use the CMAN API and the DLM API instead of Magma if you need
compatibility between current stable/RHEL4 and future release(s).

-- Lon

[Cluster-devel] Magma; Magma-plugins

[Zelikov_Mikhail]

Dave, thank you for the reply.
Magma is used in the latest release of CS and GFS. I was wondering if I use
this (openais) API will it work within the currently existing cluster
infrastructure on RHEL4.3? Or is it the future supported API?
	Mike

-----Original Message-----
From: David Teigland [mailto:teigland at redhat.com] 
Sent: Thursday, August 10, 2006 4:08 PM
To: Zelikov, Mikhail
Cc: linux-cluster at redhat.com; cluster-devel at redhat.com
Subject: Re: [Cluster-devel] Magma; Magma-plugins

On Thu, Aug 10, 2006 at 04:04:11PM -0400, Zelikov_Mikhail at emc.com wrote:
> I was looking for any documentation on Magma API or any Red Hat 
> cluster suite API.

Magma was only a temporary lib used in RHEL4, we're not using it any longer.
You should look at libcman or any of the other libraries available in
openais, http://developer.osdl.org/dev/openais/

Dave

[Cluster-devel] Magma; Magma-plugins

[Lon Hohberger]

On Thu, 2006-08-10 at 16:19 -0400, Zelikov_Mikhail at emc.com wrote:
> Dave, thank you for the reply.
> Magma is used in the latest release of CS and GFS. I was wondering if I use
> this (openais) API will it work within the currently existing cluster
> infrastructure on RHEL4.3? Or is it the future supported API?
> 	Mike

It will work on RHEL4, but it will not work on RHEL5, FC5/6 or any
future release.  

The CMAN and DLM APIs work on all of the above.

-- Lon

[Cluster-devel] Magma; Magma-plugins

[David Teigland]

On Thu, Aug 10, 2006 at 04:19:03PM -0400, Zelikov_Mikhail at emc.com wrote:
> Dave, thank you for the reply.
> Magma is used in the latest release of CS and GFS. I was wondering if I use
> this (openais) API will it work within the currently existing cluster
> infrastructure on RHEL4.3? Or is it the future supported API?

RHEL4 doesn't include openais, but libcman is available on both RHEL4 and
RHEL5 (with some minor changes IIRC).


> -----Original Message-----
> From: David Teigland [mailto:teigland at redhat.com] 
> Sent: Thursday, August 10, 2006 4:08 PM
> To: Zelikov, Mikhail
> Cc: linux-cluster at redhat.com; cluster-devel at redhat.com
> Subject: Re: [Cluster-devel] Magma; Magma-plugins
> 
> On Thu, Aug 10, 2006 at 04:04:11PM -0400, Zelikov_Mikhail at emc.com wrote:
> > I was looking for any documentation on Magma API or any Red Hat 
> > cluster suite API.
> 
> Magma was only a temporary lib used in RHEL4, we're not using it any longer.
> You should look at libcman or any of the other libraries available in
> openais, http://developer.osdl.org/dev/openais/
> 
> Dave

[Cluster-devel] Magma; Magma-plugins

[Zelikov_Mikhail]

I can see that I have libcman and libdlm installed as the part of cman and
dlm packages. I looked at the cluster, dlm and cman project home pages - the
APIs are mentioned but there is no documentation I could find. Am I looking
at the wrong place?
	Mike

-----Original Message-----
From: Lon Hohberger [mailto:lhh at redhat.com] 
Sent: Thursday, August 10, 2006 4:30 PM
To: Zelikov, Mikhail
Cc: teigland at redhat.com; cluster-devel at redhat.com; linux-cluster at redhat.com
Subject: RE: [Cluster-devel] Magma; Magma-plugins

On Thu, 2006-08-10 at 16:19 -0400, Zelikov_Mikhail at emc.com wrote:
> Dave, thank you for the reply.
> Magma is used in the latest release of CS and GFS. I was wondering if 
> I use this (openais) API will it work within the currently existing 
> cluster infrastructure on RHEL4.3? Or is it the future supported API?
> 	Mike

It will work on RHEL4, but it will not work on RHEL5, FC5/6 or any future
release.  

The CMAN and DLM APIs work on all of the above.

-- Lon

[Cluster-devel] Magma; Magma-plugins

[David Teigland]

On Thu, Aug 10, 2006 at 04:40:10PM -0400, Zelikov_Mikhail at emc.com wrote:
> I can see that I have libcman and libdlm installed as the part of cman and
> dlm packages. I looked at the cluster, dlm and cman project home pages - the
> APIs are mentioned but there is no documentation I could find. Am I looking
> at the wrong place?

Download the source code from the "cluster" cvs tree.  The API's in the
RHEL4 cvs branch will be slightly different that those in the cvs HEAD
(for RHEL5).  Look at

cluster/cman/lib/libcman.h
cluster/dlm/lib/libdlm.h
cluster/dlm/doc/*



> -----Original Message-----
> From: Lon Hohberger [mailto:lhh at redhat.com] 
> Sent: Thursday, August 10, 2006 4:30 PM
> To: Zelikov, Mikhail
> Cc: teigland at redhat.com; cluster-devel at redhat.com; linux-cluster at redhat.com
> Subject: RE: [Cluster-devel] Magma; Magma-plugins
> 
> On Thu, 2006-08-10 at 16:19 -0400, Zelikov_Mikhail at emc.com wrote:
> > Dave, thank you for the reply.
> > Magma is used in the latest release of CS and GFS. I was wondering if 
> > I use this (openais) API will it work within the currently existing 
> > cluster infrastructure on RHEL4.3? Or is it the future supported API?
> > 	Mike
> 
> It will work on RHEL4, but it will not work on RHEL5, FC5/6 or any future
> release.  
> 
> The CMAN and DLM APIs work on all of the above.
> 
> -- Lon

[Cluster-devel] Magma; Magma-plugins

[Zelikov_Mikhail]

Will do. Thank you! 
	Mike 

-----Original Message-----
From: David Teigland [mailto:teigland at redhat.com] 
Sent: Thursday, August 10, 2006 4:52 PM
To: Zelikov, Mikhail
Cc: lhh at redhat.com; cluster-devel at redhat.com; linux-cluster at redhat.com
Subject: Re: [Cluster-devel] Magma; Magma-plugins

On Thu, Aug 10, 2006 at 04:40:10PM -0400, Zelikov_Mikhail at emc.com wrote:
> I can see that I have libcman and libdlm installed as the part of cman

> and dlm packages. I looked at the cluster, dlm and cman project home 
> pages - the APIs are mentioned but there is no documentation I could 
> find. Am I looking at the wrong place?

Download the source code from the "cluster" cvs tree.  The API's in the
RHEL4 cvs branch will be slightly different that those in the cvs HEAD
(for RHEL5).  Look at

cluster/cman/lib/libcman.h
cluster/dlm/lib/libdlm.h
cluster/dlm/doc/*



> -----Original Message-----
> From: Lon Hohberger [mailto:lhh at redhat.com]
> Sent: Thursday, August 10, 2006 4:30 PM
> To: Zelikov, Mikhail
> Cc: teigland at redhat.com; cluster-devel at redhat.com; 
> linux-cluster at redhat.com
> Subject: RE: [Cluster-devel] Magma; Magma-plugins
> 
> On Thu, 2006-08-10 at 16:19 -0400, Zelikov_Mikhail at emc.com wrote:
> > Dave, thank you for the reply.
> > Magma is used in the latest release of CS and GFS. I was wondering 
> > if I use this (openais) API will it work within the currently 
> > existing cluster infrastructure on RHEL4.3? Or is it the future
supported API?
> > 	Mike
> 
> It will work on RHEL4, but it will not work on RHEL5, FC5/6 or any 
> future release.
> 
> The CMAN and DLM APIs work on all of the above.
> 
> -- Lon

[Cluster-devel] Magma; Magma-plugins

[Zelikov_Mikhail]

I can't seem to find a way to get a cluster node state information. In magma
API there are UP/DOWN/REMOVED states but in CMAN API I can only query
membership info and compare with the old one. Am I missing something?

Also I was wondering on the notification - it looks like I get a separate
event for each new node added and a single for many removed. How about
Up/DOWN information?

	Mike 

-----Original Message-----
From: David Teigland [mailto:teigland at redhat.com] 
Sent: Thursday, August 10, 2006 4:52 PM
To: Zelikov, Mikhail
Cc: lhh at redhat.com; cluster-devel at redhat.com; linux-cluster at redhat.com
Subject: Re: [Cluster-devel] Magma; Magma-plugins

On Thu, Aug 10, 2006 at 04:40:10PM -0400, Zelikov_Mikhail at emc.com wrote:
> I can see that I have libcman and libdlm installed as the part of cman 
> and dlm packages. I looked at the cluster, dlm and cman project home 
> pages - the APIs are mentioned but there is no documentation I could 
> find. Am I looking at the wrong place?

Download the source code from the "cluster" cvs tree.  The API's in the
RHEL4 cvs branch will be slightly different that those in the cvs HEAD (for
RHEL5).  Look at

cluster/cman/lib/libcman.h
cluster/dlm/lib/libdlm.h
cluster/dlm/doc/*



> -----Original Message-----
> From: Lon Hohberger [mailto:lhh at redhat.com]
> Sent: Thursday, August 10, 2006 4:30 PM
> To: Zelikov, Mikhail
> Cc: teigland at redhat.com; cluster-devel at redhat.com; 
> linux-cluster at redhat.com
> Subject: RE: [Cluster-devel] Magma; Magma-plugins
> 
> On Thu, 2006-08-10 at 16:19 -0400, Zelikov_Mikhail at emc.com wrote:
> > Dave, thank you for the reply.
> > Magma is used in the latest release of CS and GFS. I was wondering 
> > if I use this (openais) API will it work within the currently 
> > existing cluster infrastructure on RHEL4.3? Or is it the future
supported API?
> > 	Mike
> 
> It will work on RHEL4, but it will not work on RHEL5, FC5/6 or any 
> future release.
> 
> The CMAN and DLM APIs work on all of the above.
> 
> -- Lon