Monday Apr 27, 2009

Open HA Cluster Summit - 31st May 2009

Make High Availability Work for You - Open HA Cluster Summit 31st May 2009

Have you signed up for this event yet?

Join us as we explore the latest trends of High Availability Cluster technologies, as well as key insights from HA Clusters community members, technologists, and users of High Availability and Business Continuity software. Learn how to increase the availability of your favorite applications from blogs to enterprise level infrastructure. If you are a student, you may want to consider the industrial-strength Open HA Cluster software for your thesis research. You will also have the unique opportunity to hear one of the featured guest speakers, Dr. David Cheriton, industry expert and professor at Stanford University.

Come, learn, mingle with HA Clusters Community members, network, enjoy free food, and casino games!

If you are not going to be in San Francisco, you could still participate by following the technical sessions on twitter and ustream.

Jatin Jhala
HA Clusters Community Manager

This event is sponsored by Sun Microsystems, Inc.  Spread the word.  Inform your friends and colleagues.

Friday Mar 06, 2009

Cluster Chapter in OpenSolaris Bible

In addition to my day job as an engineer on the Sun Cluster team, I spent most of my nights and weekends last year writing a tutorial and reference book on OpenSolaris. OpenSolaris Bible, as it's titled, was released by Wiley last month and is available from amazon.com and all other major booksellers. At almost 1000 pages, my co-authors Dave, Jerry, and I were able to be fairly comprehensive, covering topics from the bash shell to the xVM Hypervisor, and most everything in between. You can examine the table of contents and index on the book website.

Of particular interest to readers of this blog will be Chapter 16, “Clustering OpenSolaris for High Availability.” (After working on Sun Cluster for more than 8 years, I couldn't write a book like this without a Chapter on HA clusters!) Coming at the end of Part IV, “OpenSolaris Reliability, Availability, and Serviceability”, this chapter is a 70 page tutorial in using Sun Cluster / Open HA Cluster. After the requisite introduction to HA Clustering, the chapter jumps in with instructions for configuring a cluster. Next, it goes through two detailed examples. The first shows how to make Apache highly available in failover mode using a ZFS failover file system. The second demonstrates how to configure Apache in scalable mode using the global file system. Following the two examples, the chapter covers the details of resources, resource types, and resource groups, shows how to use zones as logical nodes, and goes into more detail on network load balancing. After a section on writing your own agents using the SMF Proxy or the GDS, the chapter concludes with an introduction to Geographic Edition.

This chapter should be useful both as a tutorial for novices as well as a reference for more advanced users. I enjoyed writing it (and even learned a thing or two in the process), and hope you find it helpful. Please don't hesitate to give me your feedback!

Nicholas Solter

Thursday Jan 29, 2009

Working Across Boundaries: Solaris Cluster 3/2 1/09!

I am sure you have seen the recent blog post and the announcement of Solaris Cluster 3.2 1/09. This release has a cool set of features, which includes providing high availability and disaster recovery in virtualized environment.  It is also exciting to see distributed applications like Oracle RAC run in separate virtual clusters! Some of the features integrated into this release were developed in the open HA Cluster community. That is another first for us!

I am sure the engineers in the team will be writing blog journals in the coming weeks, detailing the features that have been developed. Stay tuned for more big things from this very energetic and enthusiastic team!

It is very interesting to see the product getting rave reviews from you,  our customers. We value your feedback and take extra steps to make the product even better. We appreciate the acknowledgement! Here is one customer success story from EMBARQ that will catch your attention:
"Solaris Cluster provides a superior method of high availability. Our overall availability is 99.999%. No other solution has been able to ensure us with such tremendous uptime"        —  Kevin McBride, Network Systems Administrator III at EMBARQ

That is one big compliment! Thank you for your continued support and feedback!

A distributed team has made this release possible. Some of the features are large and needed coordinated effort across various boundaries (teams, organizations, continents)! A BIG thanks to the entire Cluster Team for their hard work, to get yet another quality product released. It is a great team!

-Meenakshi Kaul-Basu

Director, Availability Engineering


Wednesday Jun 04, 2008

Solaris Cluster Express 6/08 available for download

Solaris Cluster Express 6/08 is now available for download! You can download the DVD image here

What is new in this release?

\* This release runs on OpenSolaris Nevada build 86. The version of the Sun Management Centre is now 3.1.

\* The HA agent for Solaris Containers is now enhanced to include support for the Solaris 9 Branded Zones on SPARC platform. This is very useful for those customers who still need to run some applications on Solaris 9 while taking advantage of the new features of Solaris 10 and above.

\* The HA agent for PostgreSQL Database is now ehanced to support WAL shipping. This feature greatly enhances the deployment of PostgreSQL database in Enterprise deployments.

\* Support for Solaris Containers configured with exclusive IP is included in this release.

\* The SCX Geographic Edition is enhanced to support Oracle Data Guard based replication.

\* This release also contains the mandatory bug fixes and other minor enhancements not mentioned above.

Stay tuned for more milestones along the open source journey!

Munish Ahuja
Madhan Kumar B.
Jonathan Mellors
Arun Kurse
Venugopal N.S.

Thursday May 29, 2008

Two Million Lines of Code

One year ago, we announced that we would open source the entire Solaris Cluster product suite. Today, we are delivering on that promise six months ahead of schedule by releasing over two million lines of source code for the Solaris Cluster framework!


Read the official press release and listen to a podcast with Meenakshi Kaul-Basu, Director of Availability Products at Sun.


This third, and final, source code release follows the initial open sourcing of the Solaris Cluster agents in June, 2007 and Solaris Cluster Geographic Edition in December, 2007. As with the previous releases, the source code is available under the Common Development and Distribution License (CDDL) under the auspices of the HA Clusters community group on OpenSolaris.org.


The open source version of Solaris Cluster is called Open High Availability Cluster. Although some encumbered parts of Solaris Cluster have not been open sourced, with this release, you can now build a fully functional HA Cluster purely from source.


In addition to the source code for the product itself, Open HA Cluster includes source for the Sun Cluster Automated Test Environment (SCATE), man pages, and globalization.


Consider getting involved in the HA Clusters community group:




Nick Solter, Open HA Cluster tech lead and HA Clusters community group facilitator

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