Linked by Thom Holwerda on Tue 26th Dec 2006 12:15 UTC, submitted by falko
Debian and its clones "This guide is written during an install of a Supermicro machine with 2 dual-core opterons (64-bit), 2 identical disks (for RAID) and a load of memory. Why OpenVZ and not XEN or the recent KVM kernel module? Well, XEN is not very stable for 64-bit architectures (yet), and it comes with quite a bit of overhead (every VM runs its own kernel) due to its complexity. KVM is very simple but restricts you to run a kernel as one process, so the VM cannot benefit from multi core systems."
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by sukru on Tue 26th Dec 2006 13:01 UTC
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OpenVZ has clear advantages if you only need seperate environments in the same OS:

* There are finer controls for resource sharing
* It allows much higher density (hundreds of zones in a physical machine).
* Zones are much smaller than virtual machines (eg ~100MB zone versus ~500MB regular install)
* There is little I/O and network overhead
* You do not have to worry about details like synchronizing time, upgrading kernel, etc that you should in virtual machines.

So as long as sharing one kernel is sufficient for your job, OpenVZ is a better alternative than Xen or VMware.

Edited 2006-12-26 13:02

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