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Lukas Gärtner
CIOZone, a social network for CIOs, recently interviewed our Founder and CEO Dr. Michael Meskes. CIOZone is a central place where CIOs can network. In this video, Roger Green takes the time to drop in to our office in Moenchengladbach, Germany to interview Michael Meskes, the founder of credativ...
Joe Conway
When you pass large amounts of data to and from PL/R, quite a lot of time is needed for converting. A change is being tested which treats arrays of 4 byte integers and 8 byte floating point values as a special case, resulting in a dramatic performance improvement. In a recent post, I discussed PL/R...
Joe Conway
When you pass large amounts of data to and from PL/R, quite a lot of time is needed for converting. It's better to directly store the data as R objects. I had been planning to continue with timeseries aggregation, but decided to take a side-road based on a recent question on the PL/R mailing list...
Joe Conway
Frequently when dealing with parametric data, you need to "roll up" the data in summary fashion as it ages in order to reduce the volume kept on hand, or maybe because the summary statistics are what really interests you. There are several ways to do that, and this post highlights four different...
Joe Conway
Someone posted a dilemma to the pgsql-sql list today that involved many if not all of his sequences getting out of sync with their respective "serial" columns. In other words, something like "SELECT max(id) FROM sometable" yields 42, but the sequence nextval for sometable.id is currently set to 36...
Joe Conway
I was given a Postgres database dump to analyze today created by "pg_dump -Fc". The source database included PostGIS 1.3.x extensions. I'm not sure if this is standard with PostGIS, but the related database objects were all dumped with a hard-coded library path, specifically /usr/lib/postgresql/8.3...
Martin Zobel-Helas
The text editor vim offers several tools for automation. This howto describes a way to auto-include text modules when creating new files. Often during programming or administration you need the same text modules again and again. The editor vim is very helpful here, as it can detect a file type...
Roland Wolters
Following our earlier introduction to RHCS we now present a real world example: the installation of RHCS with Debian to provide certain virtual machines as services. Our RHCS overview already explained the basics of RHCS. This time we will take two hosts with shared storage and provide KVM guests...
Michael Banck
In May, Consultants from credativ GmbH will be holding a 3 day advanced system and network administration workshop at the Open Source School in Munich. Training specifics (subject to modifications!): Kerberos : This training covers the Kerberos authentification protocol, which can handle a range of...
Bernd Zeimetz
Lighttpd is a web server with a fast growing user base. This howto will demonstrate how redirects can be done based on the language of the user's browser. While migrating from our old blogging software to Movable Type we decided it would be a good idea to show the blog's welcome message in English...