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Content Tagged Xen
CentOS 5.2 update
I’ve used Red Hat software for many years, right back to 6.2. Its been a long time since I’ve seen enough new features or polish in a point release to warrant any ‘wow’ factor though. CentOS 5.2 (and I expect the same for the upstream distro) felt like that when it finially arrived. I use virtualisation extensively on my development systems, mostly Xen. When I installed CentOS 5.0 everything worked, except little things were missing. To find out what vnc display a virtual machine was on, you
Xen and HA
We have been looking to build HA solutions for Open Source Xen using the checkpoints approach used my REMUS. I was happy to see Yoshi Tamura’s project called Kemari which takes a hybrid approach - lock-step and checkpoints like REMUS. A very cool presentation from the latest Xen Summit 08 is available here. A demo video and architechtural information highlights how Kemari fits into HA. It is existing to see projects filling the gap in regards to HA for Xen.
六本木ヒルズXenでランチ
某Ｎ氏と六本木ヒルズ「Ｘｅｎ」でランチ。 パワーランチ１０００円也。 これでフリードリンク＆フリーデザートです。 美味しいし、妙に安い・・・。 でも六本木ヒルズでは７０００人の人が働いており、 実際はホリエモンみたいな人は数人しかいないと思うデス。 （私などカフェや図書館、セミナーに来るだけだし（笑 という意味では普通のオフィス街ですよね。 しかも私はまたポイントが溜まって発行された１０００円の金券でフリー食でした・・・（笑
Fear and Loathing in Digital Cornerstone Incorporated, Formerly Known as Linspire
Fear and Loathing in Digital Cornerstone Incorporated, Formerly Known as Linspire Posted in GNU/Linux, Novell, SLES/SLED, Marketing, Xen, xandros, Linspire at 6:56 am by Roy Schestowitz I
Máquinas virtuales con Xen
Estos días hemos estado trabajando en sistemas de “para - virtualización” como los que te ofrece Xen y nos ha dejado bastante impresionados. La instalación del mismo no es muy complicada y el jugo que le puedes sacar a este tipo de sistemas son inmejorables. Teníamos varias máquinas haciendo de servidor de nombre secundario, servidor [...]
Xen Cluster Management With Ganeti On Debian Etch | HowtoForge - Linux Howtos and Tutorials
Ganeti is still in an early stage. Right now, it can be installed on Debian Etch nodes, and you can create virtual machines with it that use Debian Etch as well. Other Linux distributions should theoretically work, too, but there's no documentation yet.
Xen and NFS performance
Today I discovered that one of my domUs at work is performing slow on its mounted NFS share. Bonnie++ and dd tests showed a network throughput of just 300 kB/s whereas the throughput was up to 110 MB/s from dom0 to NFS server. Some Google searches revealed that Xen has problems with NFS performance with non-standard rsize and wsize setting and especially with NFS over UDP. Reducing rsize and wsize settings didn't help at all. The performance was still awful. After remounting the NFS share via
Om Malik's team interviews Citrix CTO
GigaOM: Can you tell me how the launch of Hyper-V affects Citrix Xen products? Crosby: Our key founding philosophy was fast, free, compatible and ubiquitous hypervisors. Microsoft’s Hyper-V which is compatible with XenServer, is alright when it comes to being fast; it’s 28 bucks, so close to free; and because it’s Microsoft it will be ubiquitous. So for us, it’s good. The problem is it took them too darn long to get it out. Working with Microsoft has been a little bit like having a ring through
Setting up high availability storage with MogileFS
1. Environment I used 4 Xen virtual images running ubuntu 8.04. Two will run a tracker and the database, the other two will be the storage nodes. Lets say the IP addresses will be: 192.168.0.195 192.168.0.196 192.168.0.197 192.168.0.198 2. Initial Setup Install iptables: apt-get install iptables then apply initial setup iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp --dport ssh -j ACCEPT iptab
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