The first thing you must learn about RAID technologies in Linux is that they have nothing in common with HP-UX, and I mean nothing! Yes there is LVM but that’s all, the mirror of a volume group for example is not done through LVM commands, in fact you are not going to mirror a volume […]
Tuning a HP Smart Array P400 with Linux – why tuning really matters… – Overclock.net – Overclocking.net
Tuning a HP Smart Array P400 with Linux – why tuning really matters… Today I had to do some tuning on a HP Smart Array P400 controller with 8x SAS 300GB 10K RPM HDD. It was already determined that this controller was *really* *really* bad at RAID5. This was a system that needed some decent […]
Kafe-in.net Blog/OpenVZ : Les ressources système dans un VE
Le noyau linux OpenVZ permet de se cloisonner en VE (Virtual Environment). Pour chaque VE créé, il attribue une certaine quantité de ressources système comme par exemple un nombre de processus maximum ou bien une certaine quantité de mémoire. Ces ressources sont appelées, en jargon « OpenVZique » les « bean counters », soit les « compteurs de haricots »…si quelqu’un […]
maxgarrick.com » Understanding OpenVZ resource limits
OpenVZ resource limits can be a little tricky, even after reading through the documentation on the OpenVZ website. With this post, I hope to explain the /proc/user_beancounters file as well as provide an illustration of memory guarantees/limits in an example 256mb container. Before attempting to understand OpenVZ’s memory limits, let’s recap Linux’s memory setup. This […]
Geekfault » OpenVZ : virtualisation légère, performante et amusante
Modifier la quantité de RAM C’est la commande la plus complexe : vzctl set $CTID$ –vmguarpages $((512 * 512)) –save vzctl set $CTID$ –privvmpages $((512 * 1024)) –save Là on passe à 512 Mo de ram avec possibilité de monter en pic à 1024. vzctl set $CTID$ –vmguarpages $((256 * 256)) –save vzctl set $CTID$ […]
Debian — OpenVz | K1drUx
« Gestion des ressources allouées » Gérer la mémoire allouée à un VE # vzctl set {id} –privvmpages $((65536*2)):$((69632*2)) –save Cette commande permet de limiter l’utilisation du cpu à hauteur de 15% de la totalité des cpu physiquements présents. # vzctl set {id} –cpulimit 15 –save Ne pas mettre à jour la date du dernier […]
Change Hostname Permanently on Debian or Ubuntu « AdminUser.wOrdpress.cOm
Change Hostname Permanently on Debian or Ubuntu Posted February 10, 2008 by SiiN in debian, ubuntu. Tagged: debian, Linux, ubuntu. 4 Comments Debian based systems use the file /etc/hostname to read the hostname of the computer at boot time and set it up using the init script /etc/init.d/hostname.sh We can edit the file /etc/hostname and […]
Admin Linux » Blog Archive » Installation Debian sur DELL R710, R410, RXXX
Comment installer Debian sur un serveur DELL R710 ou RXXX ? Menu * Introduction * Carte réseau « Broadcom Corporation NetXtreme II » * Charger le firmware pour l’installation * Installer le firmware sur le futur système * Le contrôleur PERC H700, H200 (HXXX) * Préparation du futur noyau * Préparation de l’installation * Fin de préparation […]
tgharold.com: Tech Blog: Creating a 4-disk RAID10 using mdadm
Creating a 4-disk RAID10 using mdadm Since I can’t seem to find instructions on how to do this (yet)… I’m going to create a 4-disk RAID10 array using Linux Software RAID and mdadm. The old way is to create individual RAID1 volumes and then stripe a RAID0 volume over the RAID1 arrays. That requires creating […]
mdadm delete linux raid – Linux/BSD
Fail all the devices, then remove them, then stop the raid. eg mdadm –manage /dev/mdfoo –fail /dev/sdfoo mdadm –manage /dev/mdfoo –remove /dev/sdfoo mdadm –manage –stop /dev/mdfoo mdadm –zero-superblock /dev/mdfoo viamdadm delete linux raid – Linux/BSD.