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Eugen Leitl | 6 Dec 2005 08:12

VServer vs OpenVZ


Before I try OpenVZ I would like to hear comments of people
who've ran both VServer and OpenVZ, preferrably on the same
hardware, on how both compare. 

Factors of interest are stability, Debian support, 
hardware utilization, documentation and community support,
security.

My planned usage is VServers in a hosting setting.

--

-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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Kir Kolyshkin | 6 Dec 2005 10:18
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VServer vs OpenVZ

My view of subject is definitely biased towards OpenVZ, but still: there 
are areas where OpenVZ is definitely more developed than VServer. Let me 
concentrate on three of these.

First is stability. By sticking to old (currently 2.6.8) kernel and 
backporting all the bug fixes, security fixes and hardware driver 
updates, we make OpenVZ kernel very stable. We do a lot of kernel 
testing in house, including stress testing.

Second is resource management. There are a lot of resources that can be 
abused from inside VServer guest or OpenVZ VPS, leading to at least DoS; 
some of those resources are not under control of traditional UNIX means 
such as ulimit. In OpenVZ we have User Beancounters (UBC for short), 
which accounts and limits about 20 of such resources (including IPC 
objects, various kernel buffers etc).

Third is virtualized network stack. AFAIK VServer's ngnet is not yet 
ready for prime time yet, while OpenVZ's venet is here. Without fully 
virtualized network stack people are experiencing problems like this one:
http://www.paul.sladen.org/vserver/archives/200511/0165.html
http://www.paul.sladen.org/vserver/archives/200511/0189.html

Regards,
  Kir, OpenVZ project leader

Eugen Leitl wrote:

>Before I try OpenVZ I would like to hear comments of people
>who've ran both VServer and OpenVZ, preferrably on the same
>hardware, on how both compare.
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Kir Kolyshkin | 7 Dec 2005 02:05
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Re: [Vserver] VServer vs OpenVZ

Let me comment on that as well (ccing our users <at>  mailing list). Sure I'm 
biased as well :)

Herbert Poetzl wrote:

>On Tue, Dec 06, 2005 at 01:20:13PM +0100, Eugen Leitl wrote:
>  
>
>>Factors of interest are 
>>- stability, 
>>    
>>
>
> Z: the announcement reads "first stable OVZ version"
>  
>
Although this is indeed the first stable OpenVZ release, OpenVZ is 
essentially Virtuozzo (without its bells and whistles), and Virtuozzo 
for Linux is available for more than five years already.

> S: we are at version 2.0.1 (> two years stable releases)
>
>  
>
>>- Debian support, 
>>    
>>
>
> Z: afaik they are redhat oriented (and recently
>    trying to get gentoo support done)
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