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 ...
Systèmes
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
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
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
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
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
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
Mercredi, un jour calme?
Semaine typique d'un administrateur système. Jour 4
Par blindaue le mercredi, octobre 24 2007, 00:00
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
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
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
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
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
vmplayer 60Mb, why ?
Par blindaue le mercredi, juillet 25 2007, 09:26
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
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
mardi, janvier 9 2007
NFS and sessions not starting
Par blindaue le mardi, janvier 9 2007, 23:48
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!
mercredi, juillet 5 2006
DSCrackNames returned 0x2 and Trash on networked drive
Par blindaue le mercredi, juillet 5 2006, 17:30
I'll get a maximum of errors, and samba give me more functionalities.
mardi, juillet 4 2006
Upgrade Active Directory from 2000 to 2003
Par blindaue le mardi, juillet 4 2006, 14:13
Few docs available by microsoft apart "only install a new computer and upgrade them all"...
mardi, mai 2 2006
password synchronisation
Par blindaue le mardi, mai 2 2006, 16:21
There is a lot of work available for identify management, you only have to know everything about what IS possible and what IS NOT
jeudi, avril 13 2006
Trac and svn
Par blindaue le jeudi, avril 13 2006, 09:58
How to generave very fast a new project with trac and svn ?
mardi, avril 11 2006
GPO not applying on XP
Par blindaue le mardi, avril 11 2006, 14:55
This is a real pain when you insert a Windows 2003 or an Windows XP in your Active Directory: GPO aren't correctly applied. This happens sometime, sometime not! In fact this is due to a boot to fast from XP. They have added some asynchronous service startup, and the network is part of that. You will get the login screen before network is up and all GPO are applied.
The detail from the startup can be found here
There is a easy solution for this problem: just make a synchronous start of service like Windows 2000:
Goup Policy : "Computer Configuration\ Administrative Templates\ System\ Logon"
set "Always wait for the network at computer startup and logon" to "Active"