Testscase was ok, it was time to script everything, and let computers works alone. Mostly. Using udp-cast, I got a better solution than NFS or netcat: same speed, and over 16 clients at the same time. And so easy to deploy ...
vendredi, mai 16 2008
Replacing ghost with tools for real men. Part3: Computers are here to work, not me. Multicast is for you.
Par blindaue, le vendredi, mai 16 2008, 12:36 - Systèmes
samedi, avril 26 2008
Replacing ghost with tools for real men. Part2: Ghosting an full computer
Par blindaue, le samedi, avril 26 2008, 21:37 - Systèmes
Here we are, I've choosen NFS for my tests: mounted RW, I can read/write data in both directions without problem. It's time to save and restore a computer
lundi, avril 21 2008
Replacing ghost with tools for real men. Part1: SMB, NFS or netcat for "Across Network"
Par blindaue, le lundi, avril 21 2008, 20:10 - Systèmes
Trying to ghost Mandriva2008.1, I've ended up with a no bootable computer. I used an old ghost (7.5), but we have the license for this tool only. Now, it's time to use real tools.
vendredi, janvier 18 2008
vmware: time shifting
Par blindaue, le vendredi, janvier 18 2008, 16:59 - Systèmes
Trying to deploy vmware for some services, I found some problems: time is going slow, very slow sometime in guest.
I've found some interesting links online, like . But the provided solutions didn't work. First clock= is depreciated. and all possible values didn't solve the problem: a very very slow clock. I got this article on vmware KB, which explained in details what is going on with clocks:
Finally I understood that
HZ=1000
is the source of all problems. clock=pit or others are only weak solution. So just recompiled the guest kernel with a
HZ=100
and all is going fine.
yes time is important especially for KDC server 
jeudi, octobre 25 2007
Semaine typique d'un administrateur système. Jour 6
Par blindaue, le jeudi, octobre 25 2007, 09:07 - Systèmes
8h20 arrivée au travail. lecture sur le web de nouvelles informatique, une me retient l'attention sunbird 0.7. je le charge et el teste un peu. Rapide, a l'air de prendre en compte des serveur caldav, je regarde justement ces serveurs, mais c'est loin d'être vraiment pret et de nombreux sont ceux ayant encore des gros bugs.
9h retour sur l'application de gestion des absences, on m'avait remonté que les modification apres coup ne fonctionnaient pas ... j'arrive pas a reproduire pour l'instant 9h20 un etudiant en TP de reseau prend l'IP d'un autre poste ... deplacment et avertissment... gravage d'un DVD de vista au passage, x16 ca va tres vite!
Reponse d'une société qui s'est vu attribué le marché logiciels: Ils ne vendent pas le SDK de Tomtom, comment qu'on fait pour pouvoir commander alors, ca ne se vend qu'en ligne avec une CB ?
Retour sur les images des PC a deployer...
10h30 pause
Apres la pause: toujours ces satanés images.
11h20 Encore un etudiant qui prend l'IP d'un serveur. apssage en salle, pour annoncer le pb, les slides comportent un exemple qu'ils recopient ...
11h40 rebelotte, seulement tous sont sur de pas avoir pris l'IP, le coupable est retrouvé par sa MAC.
12h10 des etudiants viennent demander des inforamtions supplementaire sur l'extranet pour rajouter de smodules et pour gerer leurs version et faire une vraie archi 3 tiers
12h50 ouf, le miam! 13h30 -> TD! 15h40 -> TP! 17h30 Retour sur ces images à préparer.
mercredi, octobre 24 2007
Semaine typique d'un administrateur système. Jour 5
Par blindaue, le mercredi, octobre 24 2007, 23:59 - Systèmes
Mercredi, un jour calme?
Semaine typique d'un administrateur système. Jour 4
Par blindaue, le mercredi, octobre 24 2007, 00:00 - Systèmes
Aujourd'hui, une journée complète a l'IUT. Ce qui devrait etre tous les jours le cas, à la base...
mardi, octobre 23 2007
Semaine typique d'un administrateur système. Jour 3
Par blindaue, le mardi, octobre 23 2007, 00:00 - Systèmes
Premier jour de la semaine ouvré...
lundi, octobre 22 2007
Semaine typique d'un administrateur système. Jour 2
Par blindaue, le lundi, octobre 22 2007, 00:00 - Systèmes
Seconde journée, un dimanche...
samedi, octobre 20 2007
Semaine typique d'un administrateur système. Jour 1
Par blindaue, le samedi, octobre 20 2007, 08:00 - Systèmes
Souvent, on me demande ce que je fais de mes journées, en tant qu'Ingénieur système et réseau. Je vais tenter, une semaine durant de décrire ces 7 journées que compose une semaine typique. Et pour commencer doux, on va partir d'un WE, un Samedi.
Samedi
Levé:
samedi, septembre 22 2007
suspend to disk, nvidia 6200 engineer version, Via Apollo KT266/A/333 and mandriva
Par blindaue, le samedi, septembre 22 2007, 22:07 - Systèmes
I had some problems to get out the suspend to disk working with my old computer. Big issue was the nvidia card, because I had a engineer version from a NV44A GeForce 6200. Resume never worked. I've decided to get this thing out to have quiet nights, now!
mercredi, juillet 25 2007
BWIC: it's over!
Par blindaue, le mercredi, juillet 25 2007, 10:10 - Roller
and our team is fourth.
BWIC challenge (BaWu for the french) is the Inline Cup for the , an Land from Germany. This is the equivalent of the French Cup.
This is the main page, the web page isn't a lot accurate, but it takes time to update and write all articles :). The most intereting part is the result system, which provide a large way to query all years, categories, races etc.
So less race than last year, but there was a little more people, perhaps the inline is coming a little back alone, after years of marketing.
Less races, but very well organized races, always transpoders for the time results, results online before the next days, really great. 20€ for a race, we have stuff for our money!
Next year, we will come back and perhaps add an Half Marathon in Strasbourg to the list of races!
vmplayer 60Mb, why ?
Par blindaue, le mercredi, juillet 25 2007, 09:26 - Systèmes
I've upgraded my vmplayer installation, and noticed that the rpm was going oversized, 65Mb!
Damn, java inside ? No, only the unavailibility to linux to provide a stable api for the kernel interface. Most of the files in the rpm (or the tar.gz) are modules for distribution X version Y
Where is the fault ? linus not providing a stable api, or vmware writing drivers too close to the kernel ? At least, with current released kernel 2.6.22, none of the module built works, and don't compile too. Here the url to grab the latest patch to have a working network in vmware
vendredi, juillet 13 2007
OpenOffice can lock at exit
Par blindaue, le vendredi, juillet 13 2007, 10:55 - Systèmes
Some users have reported that OpenOffice locks at exit, with 2.2 under Linux sometime. OpenOffice isn't very aware that NFS /home can be a nightmare for locks.
The solutions is easy: ask OpenOffice to make locks with care:
Edit /usr/lib/ooo-2.2/program/soffice and set SAL_ENABLE_FILE_LOCKING=0
mercredi, juin 20 2007
So long
Par blindaue, le mercredi, juin 20 2007, 14:00 - General
Time goes and no news on the blog. No time, I dream on 96h days!
These months I've been working on:
- At work, a new datacenter. going from scratch for the room, but All the existing infrastructure has to be keep or to be upgraded. And of course, it's too expensive for the manager.
- Video postcasting: Friday we will make the first large try to make a large video podcast. Multicast, Real streaming, and perhaps theora/vorbis.
- Having to review the project of my students. A new NX client, but it seems that they have only implemented a 1.5 compatible backend...
- Managing our inline Team for the Bad Württemberg challenge . As I'm the most fluent in german, I manage all the group.
- Skating! I've changed my Bond+5x90 vs. the latest Salomon+4x110 (bought at Inline Zentrum) These skate rules, I don't go faster, but it's easier
samedi, avril 21 2007
Addicted to techno is back!
Par blindaue, le samedi, avril 21 2007, 09:36 - General
After 6 months offline, the webradio Addicted to techno is back. So my relay is up again and enjoy!
samedi, mars 17 2007
Mandriva 2007.1 release and usuability
Par blindaue, le samedi, mars 17 2007, 10:41 - General
The Mandriva 2007.1 release is coming up. It will be a very good update for 2007.0 release, with a lot of bug fixes, new software. But as awlays there is still be some caveats: The KDE team has decided for you What Good is: a large, and impressionnant "Mandriva" in the kicker :
Yes That's using some space. And the kicker height is "small".
Most people change the size of the kicker to gain place to "large":
- the 4-virtual screen is 2x2, so less large
- the systray use two lines too, so 2x3 icones instead of 6 icons
So let's change the height of kicker:
Amazing! Does the KDE team try other configuration than theirs own? Does they even use KDE ? Perhaps for forcing us to switch to gnome ?
Let's correct this fu**ing configuration:
edit
/etc/kderc
and change the default directory to /usr which contains a real KDE configuration.
dimanche, mars 11 2007
D - 15 ; T - 5; H ready
Par blindaue, le dimanche, mars 11 2007, 14:03 - Roller
Only 15 Days left before the National championship. 50km to go.
Only 5 Training left, unfortunaly I won't be available for 2 training next weekend.
But in my Head, I'm ready!
It never gets easier, you just go faster
lundi, janvier 22 2007
Inline Calendar
Par blindaue, le lundi, janvier 22 2007, 13:19 - Roller
As I'm living near Germany, I go to some races in Germany too. Here some calendars
mardi, janvier 9 2007
NFS and sessions not starting
Par blindaue, le mardi, janvier 9 2007, 23:48 - Systèmes
I was tired of some student reporting "My KDE doesn't start". Sometime no kdesktop (no backgroud), some time no kicker , or only backgroud!
I've looked all around to understand why it was hapening to some users only, on only two of the four server available. NFs was used so I was suspecting some eternal fu**ing lock problem, as I've experimented some months ago. Even killing with SIGKILL didn't make them die, I had to attach these process to see them killed.
user 25545 0.0 0.0 24004 2888 ? S 13:32 0:00 dcopserver kdeinit --nosid
user 25563 0.0 0.3 32160 16060 ? S 13:32 0:00 kicker kdeinit
Looking futher, they were waiting on a select :
strace -p 25545
Process 25545 attached - interrupt to quit
select(16, 3 6 7 15, , , NULL <unfinished ...>
I had a look at running process and famd has got my attention:
Part of man-page: FAM, the File Alteration Monitor, is a subsystem that applications can use to be notified when specific files or directories are changed. It is intended as a replacement for mechanisms such as poll and select.
Exactly the sustem call which is blocking. I've stopped famd and all went fine: all process are gone alone!
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