I’ve run the power supply under load. As you can see I’ve not yet removed the screen protector foil from my multimeter connected the cables in the wrong direction so the current is negative load current @ Vout=5V [A] The load was a florist wire that accidentally had the correct length to have a resistance […]

After a (luckily unsuccessful) search for short cuts I have connected the power supply part on the pcb to an external power supply. The following screen shot shows that the power supply becomes operational at around 12V. Channel 1: VoutChannel 2: Vin (manual rise from 0 to 15V ) Unfortunately I do not have a […]

After a long time I’ve reactivated my solder iron. Since I’ve done that without additional flux (apart from the content of the solder) the result looks accordingly. My next step will be testing the circuitry. power supply part of the cancombase Surprisingly for me the soldering of the IC was the easiest. I assume, that […]

After ordering the prototype pcbs in China on Saturay they arrived on the following Wednesday. I even got one more pcb than I’ve ordered. The service is very fast and the price more than acceptable. So based on this single sample I can recommend allpcb.com. Apart from the silkscreen, the pcb looks good. But I’ve […]

Since a few weeks I have the new ThinkPad X1 Carbon 6th Generation and as many people I really like it. The biggest problem is that suspend does not work as expected. The issue seems to be that the X1 is using a new suspend technology called “Windows Modern Standby,” or S0i3, and has removed […]

The version of CRIU which is included with CentOS is updated with every minor CentOS release (at least at the time of writing this) since 7.2, but once the minor CentOS release is available CRIU is not updated anymore until the next minor release. To make it easier to use the latest version of CRIU […]

After many years the whole RPM Fusion repository has grown to over 320GB. There have been occasional requests to move the unsupported releases to an archive, just like Fedora handles its mirror setup, but until last week this did not happen. As of now we have moved all unsupported releases (EL-5, Fedora 8 – 25) […]

I will be giving two talks about OpenHPC in the next weeks. The first talk will be at DevConf.cz 2018: OpenHPC Introduction The other talk will be at the CentOS Dojo in Brussels. I hope I will be able to demonstrate my two node HPC system based on Raspberry Pis and it definitely will be […]

After having worked on optimizing live container migration based on runc (pre-copy migration and post-copy migration) I tried to optimize container migration in LXD. After a few initial discussions with Christian I started with pre-copy migration. Container migration in LXD is based on CRIU, just as in runc and CRIU’s pre-copy migration support is based […]

For almost two years Mike Rapoport and I have been working on lazy process migration. Lazy process migration (or post-copy migration) is a technique to decrease the process or container downtime during the live migration. I described the basic functionality in the following previous articles: Lazy Process Migration Combining pre-copy and post-copy migration Those articles […]

This month’s come together will be held on 2017-03-08, 8pm at our regular pub (Trödler).

Added IPv6 reverse record for 2001:7c0:700::10 – rhlx01.hs-esslingen.de

Added AAAA record for rhlx01.hs-esslingen.de – 2001:7c0:700::10

Enabled IPv6 address 2001:7c0:700::10

This month’s come together will be held on 2017-02-01, 8pm at our regular pub (Trödler).

It is a bit late but I still wanted to share my presentations from this year’s Linux Plumbers Conference: https://lisas.de/~adrian/pdf/lazy-process-migration.pdf https://lisas.de/~adrian/pdf/criu.d.pdf https://lisas.de/~adrian/pdf/criu-check-only.pdf On my way back home I had to stay one night in Albuquerque and it looks like the hotel needs to upgrade its TV system. It is still running Fedora 10 which is […]

This month’s come together will be held on 2017-01-04, 8pm at our regular pub (Trödler).

This month’s come together will be held on 2016-12-07, 8pm at our regular pub (Trödler).

This month’s come together will be held on 2016-11-09, 8pm at our regular pub (Trödler).

Enabled re-direct to HTTPS for http://lisas.de/ and http://ftp-stud.hs-esslingen.de/info/.