[cgl_discussion] ANNOUNCE: OSDL Clusters (foundational components)

Eric.Chacron at alcatel.fr Eric.Chacron at alcatel.fr
Thu Nov 27 00:55:13 PST 2003


I read your announcement this morning and the comments from Lars , Steve
and Jon.

I have been involved in CGL clustering spec as you know.
Let me just say two things:

1) we have never made a common discussion (excepted your 30 minuts
presentation in Portland )
 and decision on this new project to have these 3 services (TIPC,
memebership end event)
delivered as a new cluster infrastructure and i understand Lars point of
Is the goal just to have an annoucement  to LKML from OSDL or is it to
build a serious architecture
answering CGL requirements ?

2) technically speaking :
It could make sense to have these services implemented in kernel mode and
this is not the point for me.
The point is to define why these 3 items and why not others.
How an application may use these services to have HA ...
I think we have not really discussed neither the features nor the
How your AIS will plug on that ...


John Cherry <cherry at osdl.org>@lists.osdl.org on 11/26/2003 10:07:47 PM

Sent by:    cgl_discussion-bounces at lists.osdl.org

To:    cgl_discussion at osdl.org, dcl_discussion at osdl.org,
       osdlcluster at osdl.org, OSDL Dev <dev at osdl.org>
Subject:    [cgl_discussion] ANNOUNCE: OSDL Clusters (foundational

This announcement will go out to the linux-kernel mailing list on
Monday.  This is an OSDL pre-announcement.


OSDL is pleased to announce the kickoff of the foundational components
defined in the OSDL Cluster Architecture.  The foundational components
include a connectivity/communication service (TIPC), a membership
service, and a publish/subscribe event service.

The connectivity/communication service (TIPC) and the membership
service will be Linux kernel modules.  The proof of concept for the
event service will be initially implemented as a user space deamon.
Both the membership service and the event service are being developed
to conform to the SAF-AIS specification.  Early releases of these
services will be a subset of the full SAF-AIS interface

These foundational cluster projects will not produce a full cluster
implementation.  The intent is to enable the Linux OS as a
"clusterable kernel".  With these foundational services enabled,
when a kernel boots on a system on a network, the system would
become part of the cluster.  The cluster is defined by locality on
the network.  Applications and other cluster services (checkpointing,
resource managegers, etc.) would simply subscribe to membership events.

Documents and project pages:

  OSDL Cluster project page:

 OSDL Cluster Architecture:

 TIPC project page:

 Membership service project page:

 Event service project page:

 SAF Application Interface Specification:

A single mailing list will be used for all of the projects
(osdlcluster at osdl.org).  To sign up for the mailing list go to

John Cherry
Mika Kukkonen
Daniel McNeil
Mark Haverkamp

Open Source Development Labs

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