Probably » linux

Perl 5.1x simple set up on RHEL5 derivative

Mark — Thu, 08 Mar 2012 22:07:14 +0000

Red Hat Enterprise Linux, CentOS and Scientific Linux 5.x come with Perl 5.8.*. Perl 5.8.8 was released in 2006 – it’s nearly six years old now! Many modules on CPAN are starting to need 5.10 as a base version, so …

Creating VMware ESXi virtuals using the Perl SDK

Mark — Fri, 25 Nov 2011 12:42:59 +0000

I’ve been tinkering with the Perl SDK for VMware this last week. I wanted to create a virtual from the command line using the shipped ‘vmcreate.pl’ script – but the ‘datacenter’ variable it insists be there doesn’t appear anywhere in …

Setting up sudoers with Puppet and Augeas

Mark — Fri, 26 Aug 2011 09:40:18 +0000

Since Augeas became available within Puppet it’s been considerably easier to do inline edits of configuration files – providing there’s a lens, of course. However, I find the syntax of Augeas less than friendly, and battled for a while to …

More on Benchmarking OSs

Mark — Mon, 15 Feb 2010 11:28:40 +0000

Intrigued by my recent benchmarking exercise I decided to take a look at the various operating systems’ performance on a common virtualisation platform. Given the ubiquity of Amazon Web Services I thought this would be the ideal platform to run …

Benchmarking Linux, Solaris and Windows on HP hardware

Mark — Mon, 01 Feb 2010 18:28:09 +0000

A short while ago I got the opportunity to compare the performance of a number of operating systems on the same piece of hardware. The server in question was a HP DL580G5, but with four 6-core Intel Dunnington CPUs in, …

Choosing an Operating System

Mark — Mon, 01 Feb 2010 18:25:46 +0000

When it comes to picking what Operating System to use for your project, how do you go about picking the ‘right’ one? That’s not a simple question, and therefore there is no simple answer. There should be two factors that, …

Solaris 10 and Linux iSCSI interoperability

Mark — Thu, 14 May 2009 10:33:17 +0000

Recently a friend and I were trying to get XenServer 5 to use our Solaris 10 server as it’s backing store. We specifically wanted to use an iSCSI volume exported to the Xen server, as the performance is promised to …

Linux: error: unknown error 22 setting key

Mark — Tue, 24 Feb 2009 12:36:33 +0000

I’ve been testing some new kernel tunings for Oracle databases the last few days, and experienced the odd error “error: unknown error 22 setting key ‘kernel.shmall’” when trying to sort out shared memory. Even more bizarre was the fact the …