Archive for the tag 'linux'

Mar 29 2009

Sometimes You Need to Compile It Yourself

Published under Technology

I posted an earlier version of this on the Puppet mailing list recently; it seemed worth expanding here. An Ideal World In an ideal world, for each piece of Linux software I use, a very recent version would be “in the box” in the distribution package repositories, for every distro and distro release I use. […]

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Jan 30 2009

DRBD on Ubuntu 8.04

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A while back I wrote about setting up DRBD on Ubuntu. It is considerably simpler now: you don’t need to build the module anymore, a reasonably recent version is already in the box. You should still read the full directions at the DRBD web site, but to get it going, you only need to configure […]

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Dec 05 2008

Move files into an existing directory structure, on Linux

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I recently needed to move a large number of files (millions) in a deep directory structure, into another similar directory structure, “merging” the contents of each directory and creating any missing directories. This task is easily (though slowly) performed on Windows with Control-C Control-V in Explorer, but I could find no obvious way to do […]

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Dec 02 2008

Large, economical RAID: 10 1 TB drives

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I recently needed a file server with ample capacity, on which to store data backups. The typical data access pattern for backups is that data is written once and read rarely, so bulk backup storage has much lower performance requirements than, for example, disks used for database files. I need to store a great number […]

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Oct 22 2008

Analyzing PostgreSQL logs with pgFouine (on Ubuntu 8.04)

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pgFouine is a slick, useful, and free tool for analyzing PostgreSQL query workloads. It works without any impact on the running PostgreSQL: it analyzes the PG log output. The caveat is that it needs PG configured to write the right kind of log output. Sadly, as of version 8.3 PG has a wrinkle in how […]

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Oct 21 2008

Multicast your DB backups with UDPCast

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At work we have a set of database machines set up so that one is the primary machine, making backups once per day, and several other machines restore this backup once per day, for development, ad hoc reporting, and other secondary purposes. We started out with an obvious approach: back up on server1, to a […]

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