Tuesday Apr 21, 2009

Solaris Cluster + MySQL Demo at a Exhibition Hall near you


If by any chance you are at the MySQL user conference in Santa Clara conference center, there are some great possibilities to see MySQL and Solaris Cluster in action. We have a demo at the exhibition hall, where you can see MySQL with zone cluster and MySQL with SC Geographic Edition.

I will host a birds of a feather at Wednesday 4/22/09 evening in meeting room 205 at 7 pm. The Title is "Configuring MySQL in Open HA Cluster, an Easy Exercise" check out the details here.  I will give a presentation at Thursday 4/23/09 morning 10:50 in Ballroom G, the title is "Solutions for High Availability and Disaster Recovery with MySQL". Check out the details here

I hope to see you there in person.

-Detlef Ulherr

Availability Products Group

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

Wednesday Feb 04, 2009

Working together with the MySQL team

One year after Sun acquired MySQL we see the positive results of this acquisition. Things are going very well in terms of collaboration, the teams are getting closer together and share the experience and the knowledge. If you want to know how the teamwork is seen from the Sun Cluster engineers, Thorsten Frueauf and myself, you should read this.

It was interesting for us to see that this interview was well observed by MySQL customers and community members. Although the interviews were not technical, they lead to technical questions. You can get more information here.

So if you are keen to see what the MySQL community wants to know about Sun Cluster, read the blog entry about MySQL and Sun Cluster.

Detlef Ulherr

Solaris Cluster Engineering 

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 Sep 24, 2008

Announcing Availability of SCX 09/08

We are pleased to announce the availability of the latest Solaris Cluster Express (SCX)!  You can download the software here.

There are some major milestones reached in this release: It incorporates the first contribution from a community member!   And coming from a student, it is doubly delightful!!  It also provides early access to some of the new and exciting features that are being developed by the team.

What is new?

\* This release is runs on SXCE build 97. The version of Sun Management Center and other shared components are upgraded to be compatible with the Solaris Express Community Edition (SXCE) version.

\* The fencing mechanisms have been enhanced with the introduction of optional  fencing.  This provides a mechanism for the administrator to change the fencing mechanism either at global or at an individual disk level.

\* This release also has a new feature called zone clusters.  This feature makes it possible to form a virtual cluster based on the zones of a cluster.  This is made possible by the introduction of a new brand of zone called "cluster".  Needless to say, most of the code is available under a CDDL license like the rest of the software.  This feature is sure to make you reconsider your views about Open HA Cluster and Solaris Cluster!  Please refer to the clzonecluster(1CL)  man page for more details. You can find a cheat sheet for configuring a zone cluster here.

\* Use of Loopback File Driver (lofi) device for global-devices name space is introduced with this release.  A dedicated partition for the exclusive use of global-devices name space (i.e /globaldevices) is no longer the requirement.

\* As usual, there are the mandatory bug fixes and you can find them from the change log.

This release is a major milestone in the Open Source journey. For the list of all the exciting projects that the community is working on, please visit Open HA Cluster community.  This release of Solaris Cluster Express (SCX) will not work on OpenSolaris binary distribution (OpenSolaris 05.08).  For  the planned move to OpenSolaris binary distribution, visit Project Colorado.

Munish Ahuja

Madhan Kumar B

Jonathan Mellors

Venugopal N.S


Oracle Solaris Cluster Engineering Blog


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