Open Source Days 2010

by Mads
January 31, 2010 at 22:48 | categories: solaris

This year I'll be presenting at Open Source Days.

DTrace tutorial

Introducing DTrace for system administrators, developers and performance tuners.
Topics include:
  • Basics of the D scripting language
  • Tracing system behavior
  • Digging depp: kernel tracing
  • Tracing dynamic languages
  • Adding probes to your own code
  • The DTrace toolkit

Last time

Last Open Source Days was in 2008. My talks then. I never got around to posting slides, so here they are - OpenSolaris Storage Platform - Storage revolution in the making. (Actually these slides are from about a month later at DTU where the 1 hour from Open Source Days became 2.5.)

OpenSolaris Storage Platform - Storage revolution in the making

by Mads
November 10, 2008 at 10:24 | categories: sun, solaris

Thursday November 13th 17.00 - 18.30 at DTU in building 308 aud. 12.

This talk will be an introduction to some of the storage technologies available today or in the near future in Solaris:

  • In-kernel CIFS support
  • Remote replication with AVS
  • Iscsi and scsi (comstar) target support
  • SamFS hierarchical storage management
  • Highly scalable filesystems such as QFS and pNFS.

It is a slightly updated version of my talk from OpenSource Days. I don't have to hurry as much and have added a couple of additional slides.

Talk on Open High Availability Clustering

by Mads
October 02, 2008 at 12:01 | categories: sun, solaris

Steve McKinty, Sun Microsystems will be in Denmark, because he is speaking at the Open Source Days 2008 conference and has offered to give an extra talk the day before the conference on Open High Availability Clustering. Steve has led The Solaris Clustering Geographic Edition team since 2005.

Open High Availability Cluster (OHAC) is the open-source code base of Solaris Cluster1, a high availability (HA) clustering solution from Sun Microsystems. The main difference between Open HA Cluster and Solaris Cluster is that Open HA Cluster doesn't provide an end-user product or complete distribution. Instead, it is an open source code base, along with build tools necessary to develop, build, and use the code.

The talk will take place Thursday October 2nd at the IT-University, Rued Langgaardsvej 7, 2300 Copenhagen S, in room 2A12 at 16.00

Please RSVP.


The term cluster is often associated today with High Performance Computing (HPC), but it also has a key role to play in the area of Business Continuity and High Availability. There is a lot of commercial interest in developing innovative solutions to these problems.

This talk will start with a brief description of the fundamentals of Business Continuity and how a High Availability framework such as Solaris Cluster can be used in that area, when combined with data replication technologies.

It will describe in more detail some of the work being done through the Open HA Cluster (OHAC) and related communities, and then will look at the technical details and progress of some projects that have been recently started by community contributors.

Lastly I'll discuss other opportunities for joint work and contributions with the OHAC members.

There will be time for questions on any aspects of Open HA Cluster and Business Community.

Upgrading to Solaris 10 5/08

by Mads
April 28, 2008 at 22:09 | categories: sun, solaris

I ran into a small issue when I was live upgrading a Solaris 10 8/07 (update 4) to 10 5/08 (update 5). Somewhere well over six hundred packages failed to install according to the log. Looking closer at the log, it was all the same:

Cannot find required executable /usr/bin/7za
pkgadd: ERROR: class action script did not complete successfully

Asking a bit around, I found that /usr/bin/7za appears as part of SUNWbzip but not until 5/08. The easy fix was to manually install SUNWbzip and starting the upgrade once more.

Other new features in 5/08 are listed here. For me the only really interesting feature is CPU capping which may come in hand for some of our zone servers at the ASF.

Update: Ryan Novosielski tells me that there's a patch to supply 7zip: 137321-01 for sparc and 137322-01 for x86. I suppose that's the official way (although the LU installer should supply it). Adding the package as I wrote before works just as well.

Sun opensources SAM and QFS

by Mads
March 25, 2008 at 23:30 | categories: sun, solaris

Last week, Sun added SAM/QFS to the growing stack of storage software - see the Storage Platform section.

SAM is the Storage Archive Manager (a HSM) and QFS is the Quick File System (a multi-writer global filesystem).

Joerg Moellenkamp posted a nice writeup on SamFS.

So why do I care? Both SAM and QFS could be immensely useful for work and having access to the code rather than being stuck with a short term trial makes it a whole lot easier to get a test system up and running. Also from a long term perspective, much of what's happening in storage these days seem to be happening around opensolaris.
Traditional storage vendors must be feeling the heat from Sun and it will be interesting to see what happens in an area where charging an arm and a leg for features seem more common than not.

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