Author: AKoe

Cluster Updated to CentOS 6.5 (IGB/PTP Problems)

Normally I would not mention that our Linux cluster was updated. But as the update to CentOS 6.5 produced some strange errors I thought that I write it down in case somebody else has the same errors. Our cluster has a bit more than 200 nodes and all nodes are running disk-less with read-only mounted […]

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Checkpoint and almost Restart in Open MPI

Now that checkpoint/restart with CRIU is possible since Fedora 19 I started adding CRIU support to Open MPI. With my commit 30772 it is now possible to checkpoint a process running under Open MPI. The restart functionality is not yet implemented but should be soon available. I have a test case (orte-test) which prints its […]

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Using the ownCloud address book in mutt

Now that I have been syncing my ownCloud address book to my mobile devices and my laptop I was missing this address book in mutt. But using pyCardDAV and the instructions at http://got-tty.org/archives/mutt-kontakte-aus-owncloud-nutzen.html it was easy to integrate the ownCloud address book in mutt. As pyCardDAV was already packaged for Fedora it was not much […]

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terminatorX 3.90

A new terminatorX release is available, grab the tarball from the download section if you want to give it a try. While still GTK+2 based, this release completes the first half of the GTK+3 migration guide, expect the next releases to be GTK+3 based. Aside of lots of cleanups addressing deprecated APIs, this release also […]

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SCM Migration

Finally, the terminatorX sources have a new home, the source code repository is now using git. We also have one of those neat gitweb instances up and running here. More details are available on the new Code section.

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Site Revamped

In preparation for the upcoming terminatorX release this site has been overhauled. The layout generated by the original handcrafted scripts looked rather antiquated, so the scripts were retired in favour of WordPress with all its goodies including comments and HTML5 media playback. In case you have visited terminatorX.org before you should find all the things […]

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New external RAID

Today a new external RAID (connected via Fibre Channel) was attached to our mirror server. To create the filesystem (XFS) I used this command: mkfs -t xfs -d su=64k -d sw=13 /dev/sdf1 According to https://raid.wiki.kernel.org/index.php/RAID_setup#XFS this are the correct options for 13 data disks (15 with RAID6 plus 1 hot spare) and a stripe size of 64k.

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Dynamic DNS

For the last ten years I wanted to set up my own dynamic DNS service but was never motivated enough. Recently enough motivation was provided and using the scripts from http://www.fischglas.de/software/dyn/ made it really easy to set up a dynamic DNS service using bind. Following changes were necessary to the named.conf file: zone "dyn.domain" in […]

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bcache Follow-Up

After using bcache for about three weeks it still works without any problems. I am serving around 700GB per day from the bcache device and looking at the munin results cache hits are averaging at about 12000 and cache misses are averaging at around 700. So, only looking at the statistics, it still seems to […]

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