Lustre 2.4.0 /proc/fs/lustre procfs dump
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As requested, here is a Lustre 2.4.0 /proc/fs/lustre dump containing various bits of information on my simple single node test system Click here to view
Category Archives: Linux
My Beloved Logitech K800 keyboard and it’s recent failures….
So after a few months of being carefully packed up (and turned off), I finally had enough free time to unpack my office again and get things going. To my surprise the keyboard wasn’t working correctly. Even though it was … Continue reading
mdtest usage file / readme
Below is the README file for mdtest, an application designed to test meta data performance of a given file system /******************************************************************************\ * * * Copyright (c) 2003, The Regents of the University of California * * See the file COPYRIGHT … Continue reading
ffmpeg / avconv image to video file…
So while playing around with one of the local ski resorts website I decided, hey wouldn’t it be neat to time lapse the whole day by grabbing a frame a second from the public web cam. After collected my images … Continue reading
[DUH] expr: syntax error
Um.. well brain dead moment tonight after putting in huge hours last week. echo `expr 2 * 2` expr: syntax error Of course… forgot to escape * 🙂 echo `expr 2 \* 2` 4 Sigh!
Using Imagemagick to split anitmated gifs up
So once again I had to go googling the man page to find this so I’m posting it here. convert animated.gif -scene 1 +adjoin frame_%03d.gif
IOR usage file
IOR is a file system testing tool designed to work in a clustered environment. Below is the usage instructions /*****************************************************************************\ * * * Copyright (c) 2003, The Regents of the University of California * * See the file COPYRIGHT for … Continue reading
Bash: internal time command successful redirect
So today I was struggling with `time’ trying to get it to redirect. Basically what I wanted to do was time the output of a file, then pipe both timing and file output to gzip for compression. After struggling with … Continue reading
Some Lustre FS basics
Lustre is a parallel distributed file system which provides high performance capabilities and open licensing, it is often used in supercomputers and extremely large scale hosting facilities (think Netflix via their 3rd party hosts). Generally, most of the worlds largest … Continue reading
Great set of file system benchmarks over at alephnull
Over at alephnull they’ve put together a really nice set of file system benchmarks, tracking all softs of various options which can improve and hurt performance when running in various mdraid configurations. From their site: Linux Software RAID Performance Comparisons … Continue reading