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Re: [Xen-users] Which version for hosting?

To: Jonathan Tripathy <jonnyt@xxxxxxxxxxx>
Subject: Re: [Xen-users] Which version for hosting?
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sat, 15 Jan 2011 20:29:15 +0200
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On Sat, Jan 15, 2011 at 06:23:36PM +0000, Jonathan Tripathy wrote:
> On 15/01/11 12:44, Pasi Kärkkäinen wrote:
>> On Wed, Jan 12, 2011 at 09:45:13PM +0000, Jonathan Tripathy wrote:
>>> Hi Everyone,
>>> Is the 4.x branch suitable yet for serious production hosting services?
>>> We currently run the latest 3.x version with a CentOS Dom0 which has
>>> been rock solid for us, but wondering if we would gain any advantages by
>>> upgrading to 4.x? Are there any security issues fixed in 4.x that are
>>> present in 3.x?
>>> When we were deploying some server last summer, we tested 4.0, but found
>>> it to be a bit buggy (random lock-ups occurring)
>>> I'm just trying to get an idea of which version is used out there
>> Xen 4.0.2-rc1 was just released a couple of days ago.
>> I'd recommend you to try it, and run some proper tests
>> with your workloads and see how it goes.
>> If you have any issues, or find some bugs, let us know.
>> Note that some people have had random lockups due to ACPI C-states
>> being enabled in the BIOS. That option is known to cause a lot of
>> problems and crashes on multiple platforms, not only in Xen.
>> Also dom0 kernel version will heavily affect the stability
>> of the whole system. You basicly have two choises there.
>> 1) pvops xen/stable-2.6.32.x branch, and SLES11 SP1 Xenlinux 2.6.32 kernel.
>> -- Pasi
> I'm guessing if I went with the 4.x branch, is using the CentOS provided  
> kernel out of the question? At the minute, we use the latest 3.x branch  
> (3.4.3) due to extra features, but we use the kernel from CentOS (Red  
> Hat) due to it stability and patch management (yum). 3.4.3 and CentOS  
> provided kernel works really really well.

In general Xen 4.0 works with 2.6.18 based dom0 kernel aswell.
Try it and see how it goes with the el5 kernel :)

I know gitco.de guys had some problems with the el5 dom0 kernel,
but those might be already resolved.

-- Pasi

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