update
Conversations on #lopsa reminded me I have a blog here. Been playing with ‘release management’ for work’s roll of RHEL. Now playing with putting the OS (or at least what we need to build it) into SVN.
system-admin
Using Solaris RT scheduler class to get things done on an overloaded machine
Sometimes when you login to a Solaris NFS server, there is so much going on that you can hardly get anything done. Guds takes forever, ps takes 30 seconds, and you make little progress. Fortuitously, it’s very easy to adjust your scheduling priority on the CPU so that you can get things done. Once you…
SuperComputing 2011 thoughts
I’ve just spent the last 5.5 hours wandering around the trade show at SuperComputing 2011. The trends I noticed last time SC was in Seattle (I think it was 2005) don’t seem to have changed much except for one “interesting” development which I’ll get to in a minute. There appear to be two primary thrusts…
Come to LISA!
I don’t post here often, but this one is important. Make your reservations for LISA, now! Don’t miss the early registration deadline, it’s coming up soon and can save your organization significant money and increase your chances of getting to go! LISA is in Boston. Nevermind the weather, Boston is a great town and the…
OpenIndiana 151a Host NFS Write Speed Issue with VirtualBox Bridged Guest
I recently “upgraded” my home file server to OpenIndiana 151a. It was more of a sideways migration, really, since it was previously on Solaris 10 u8.
Anyway, I noticed a big performance hit on NFS after switching to OpenIndiana. Initially I thought it was an issue with some slower disks I installed, as I also added two 3TB 5400 rpm Hitachi disks in a new ZFS mirror immediately after the migration. Further testing showed the existing 3 disk raidz pools also exhibiting the poor NFS write speed, though, so I rejected that theory.
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An experience with bad monitoring choices.
I recently came across blog post by morgajel from February on The Philosophy of Monitoring, and I enjoyed it quite a bit. I really could have used this document several ago when I had my own run in with problems caused by over monitoring and explaining them to management.
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“Security Questions”
From OWASP Development Guide Applications MUST NOT implement questions and answers as they are contrary to most privacy regimes and ineffective http://code.google.com/p/owasp-development-guide/wiki/WebAppSecDesignGuide_D2 Personal note: web apps that allow you to bypass password authentication via security question/answer drive me batty. I have half a mind to start contacting the webmasters to show them the above. Aleksey
The alpha version of the SWEBOK Version 3 will be available in 4Q2011 for public commenting.
The alpha version of the Software Engineering Body of Knowledge Version 3 will be available in 4Q2011 for public commenting. www.swebok.org
GraphViz rocks
I did something cool Friday. I was trying to document all the data flows in and out of our in-house Web app. First I put the data flows into a database table: source, sink, what is being transmitted, details on the source point, details on the sink point, is it a push or a pull,…
Excellent job prospects are expected
Excellent job prospects are expected for Computer Network, Systems, and Database Administrators. United States – Department of Labor – Bureau of Labor Statistics – Occupational Outlook Handbook, 2010-11 Edition – Computer Network, Systems, and Database Administrators http://www.bls.gov/oco/ocos305.htm