Systems and Cloud Engineering, Architecture, DevOps, Infrastruture
I ran into an incredible tool known as StarCluster, which is an open-source project from MIT (http://star.mit.edu/cluster/). StarCluster is built using Sun Microsystem’s N1 Grid Engine software (Sun used it to do deployment for HPC environments). And the folks at MIT developed on a fork of that (SGE – Sun Grid Engine) and StarCluster was …
Cloudera Hadoop, StarCluster and Amazon EC2 Read More »
This is an old cheat sheet I unearthed digging through an old USB drive I used to use for backups. It’s from ’07 — good to reminisce about the oldish days 😀 Okay…so it’s by no means a complete document, but it’s all I got for now. Moreover, if you are still using HPUX, …
HP UNIX Cheat sheet Read More »
We all have to create topology diagrams, high level visual representations of our thoughts or environments (or software solutions etc) from time to time, for as they say – “A picture is worth a thousand words”. The Graphviz software (http://www.graphviz.org/) provides us a simple and elegant way to do so, which with a little bit …
Using Perl and Graphviz to simplify your busy life Read More »
About the STREAM benchmark http://blogs.utexas.edu/jdm4372/tag/stream-benchmark/ Here’s what the author has to say about the benchmark itself — What is STREAM? The STREAM benchmark is a simple synthetic benchmark program that measures sustainable memory bandwidth (in MB/s) and the corresponding computation rate for simple vector kernels. /*———————————————————————–*/ /* Program: Stream */ /* Revision: $Id: stream.c,v 5.9 2009/04/11 …
STREAM(like) benchmark, Solaris and the SPARC T4 processor Read More »
Prerequisites are as follows: 1.NFS share that is “rw” on target host 2.working flarcreate (if not working, use a flarcreate from a patched Solaris 9 system. There is a flarcreate bug on Solaris 9 that can be worked around by using the aforementioned file) In this example, we will use old-phys-server (jumpstart) as the P2V …
P2V an existing Solaris 9 or 10 host Read More »
It’s been a while since I’ve posted anything. So, here goes: Identifying kernel memory leak on myhost-ldom (after P2V and OS upgrade from Solaris 9 to Solaris 10u10): kmem_track.d sees this: Tracing…If you see more allocs than frees, there is a potential issue… Check against the cache name that is suspect CACHE NAME ALLOCS FREES kmem_bufctl_audit_cache …
Using mdb and DTrace to detect Memory Leaks Read More »