www.ninjahdev.com

The recent spamassasin bug reared it's ugly head today when we found an old Mdaemon server (that uses Spamassassin as its detection engine) that was wrongly scoring emails as spam.

In the ongoing effort to optimize the performance of VMWare guests on a Linux host particular attention should be paid to the physical disk arrangement and how VM's are arranged on them.

Event ID 9646 is occuring in SBS Application log. The users Outlook reports that it is Disconnected from Exchage. Checking the Logons list in Exchange System Manager shows 32 sessions open.

After this limit is reached further logons are disabled to prevent performance issues. There are apparently registry entries to increase this limit (coulnd't dfind them in SBS 2003 - different reg hive?) but the cause is a much more interesting problem to understand and resolve. IT'S A CABLE FAULT!

Ran into an interesting problem whilst booting Ubuntu on my WC6000. There are several physical disks each containing a root partition (previous distros) and GRUB is normally set to boot my current "flavour of the month!.

The majority of our clients use a CMS for their website requirements, the two most popular are Joomla! and Drupal. Both are supported by our webhost http://gnisp.net pretty much "out the box". We'll be looking into tuning the performance of these CMS's as well as integration into other core system components. The desired results is an integrated ISPConfig/CMS deployments tool.

After many months of planning and spurned on by rising data centre costs, especially power, we will be migrating to a revised core setup. Currently the physical servers are very much under-utilized even though they are all running virtual machines. The ones that are at capacity are only running a single VM per host. Therefore we will install brand new hardware to run those performance dependant VM's and spread the remaining VM's over the most powerful legacy hosts.

This blog will describe the ongoing technical developments at ninjahdev