OpenSolaris

Basically, what we want to be able to do is:

1. Create a multi-node campus cluster (at least 8 sun4v nodes) where half of the nodes are in one site, with the other half in the second site. Assume that both sites are active at all times.
2. Within this cluster I would have Logical Domains that have their root filesystems provisioned onto replicated LUNs (EMC or HDS via SRDF or TC).
3. Additionally, realizing that this functionalty won't be there until LDOMs 1.1, I would want those replicated LUNs to have multiple SAN paths, with primary and secondary I/O domains each serving up at least one path to the LDOM, with the LDOMs' MPxIO aggregating those paths into one device.

My assumption is, that Sun Cluster would be running in the primary I/O-Control domain in order to facilitate the failover of the entire LDOM, managing the storage replication commands in the process. This would give us the ability to failover LDOMs between sites.

We may or may not then want to run SC _inside_  the LDOMs for failing over services between running LDOMs.

Hopefully this makes sense!

Thanks again,
Matthew
--
Matt Walburn
http://mattwalburn.com

On Mon, Dec 8, 2008 at 3:49 AM, Hartmut Streppel <Hartmut dot Streppel at sun dot com> wrote:

Hi Matt,

On 12/05/08 13:50, Matt Walburn wrote:

This is excellent news! Since this would leverage the existing agent,  does that imply that one will be to leverage SRDF or TrueCopy for  campus/geo type failovers of LDOMs?
 

I am not sure whether you want to use SRDF/TC within a cluster or between clusters. With SC Geo this should be straight forward also not tested yet.
With campus cluster, once this agent is available it should be a matter of testing.

Do you plan to support secondary I/O domains?
 

It is my understanding that a secondary I/O domain is already supported. At least one of the configuration diagrams in the suncluster wiki shows a config with 2 I/O domains and volume mirroring and IPMP setup between these IO domains.

Regards
  Hartmut

Thanks for starting this, let me know if I can help in testing.

-M

--
matt walburn
http://mattwalburn.com

On Dec 5, 2008, at 4:44 AM, Hemachandran Namachivayam <Hemachandran dot Namachivayam at Sun dot COM  > wrote:

 

Hi OHAC members,

I would like to introduce the "Failover LDoms agent for Guest domain"
and as an addendum for the HA-xVM agent developed in OHAC release.  So we
are not talking about developing a new agent, rather focus on  extending
the existing HA-xVM Agent.

Refer to HA-xVM agent at http://opensolaris.org/os/project/ha-xvm/

Please find the information below describing the project

1) Purpose

  The purpose of this project is to enhance the (HA-xVM) to support
failover of LDom Guest domains between two or more OHAC nodes.

2) Project Team

  - HA-xVM team

3) Project Description

  Enhancing the HA-xVM agent would require to support the below
mentioned bullets for a LDom Guest domain on SPARC machine.

   * Manage the start/stop and restart of LDoms Guest domains.
   * Failover a Ldoms Guest domain between cluster nodes.
   * Allow for ++ve and --ve affinities between LDoms Guest domains
across cluster.
   * Allow for different failover techniques, i.e. Stop/Failover/ Start
or Live Migration.

-Thanks and Regards
Hemachandran
_______________________________________________
ha-clusters-discuss mailing list
ha-clusters-discuss at opensolaris dot org
http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss
   

_______________________________________________
ha-clusters-discuss mailing list
ha-clusters-discuss at opensolaris dot org
http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss
 

--
Sun Microsystems GmbH           Hartmut Streppel                
Sonnenallee 1                   Systems Practice
D-85551 Kirchheim-Heimstetten   Phone:  +49 (0)89 46008 2563 Germany                         Mobile: +49 (0)172 8919711      
http://www.sun.de               FAX:    +49 (0)89 46008 2572
mailto: hartmut dot streppel at sun dot com
Sun Microsystems GmbH, Sonnenallee 1, D-85551 Kirchheim-Heimstetten
Amtsgericht München: HRB 161028
Geschäftsführer: Thomas Schröder, Wolfgang Engels, Dr. Roland Bömer
Vorsitzender des Aufsichtsrates: Martin Häring