[CentOS] Centos 5.2 and Xen

Victor Padro vpadro at gmail.com
Thu Jun 12 06:24:35 UTC 2008


On Wed, Jun 11, 2008 at 10:25 PM, Ruslan Sivak <russ at vshift.com> wrote:

> Luke S Crawford wrote:
>
>> russ at vshift.com writes:
>>
>>
>>> If you only have 512mb of ram, there's almost no reason to virtualize.
>>> Windows needs a minimum of 128-512MB to run stable.  I highly suggest that
>>> you get more RAM - its very cheap these days.
>>>
>>
>> seconded.  my standard server has 8G unbuffered ecc.  Newegg sells 2x2Gb
>> packs of unbuffered ECC kingston brand ddr2 for under $100.
>>
>> http://www.newegg.com/Product/Product.aspx?Item=N82E16820134312
>>
>> No reason, really, to not fill your motherboard with ram.
>>
>>
>>> If you want to dedicate a box to virtualization, and won't be using more
>>> then 4GB of ram for your virtual machines - I highly recommend xenserver
>>> express.  Its free, but has much better performance then vmware.
>>>
>>
>> the free (closed) xensource product is good... I also wanted to point out
>> the new gpl windows pv drivers:
>>
>> http://wiki.xensource.com/xenwiki/XenWindowsGplPv/
>>
>> you could use them with the standard open-source Xen, or even with the Xen
>> support distributed with CentOS 5, and avoid the ram limits all together.
>> (well, there is a limit to the open-source xen, but it's ridiculous;  most
>> of us won't hit it for several years, at least.)
>> still kinda beta, but something to watch.
>>
>>
>>
>
> Yea, I've been playing around with this.  The performance seems on par with
> the XenSource drivers, but like you said, it's pretty beta.  James has been
> great in fixing the bugs, but it's just not ready for production use right
> now.  Without using the GPLPV drivers, Xen is not ready for production use,
> the IO throughput sucks, and there is no graceful shutdown.
> If XenServer Express would only allow for 8GB, it would be perfect.  The
> administrative interface is really polished and fully featured (except
> things like migrations, which understandably come with the enterprise
> version).
> Once the GPLPV drivers mature a little bin and someone makes some decent
> admin tools for Xen, Xen will be ready for the enterprise.  I bet a company
> can make good money just developing and selling the admin tools for Xen.
>
> Russ
>
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