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Re: [Xen-users] Dom0 on a NFSRoot Environment

from [Thiago Vinhas]

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To:	goodb0fh <goodb0fh@xxxxxxxxx>
Subject:	Re: [Xen-users] Dom0 on a NFSRoot Environment
From:	Thiago Vinhas <thiago@xxxxxxxxxx>
Date:	Sat, 6 Aug 2011 14:51:10 -0300
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Why would xen use dom0's /boot?

On Sat, Aug 6, 2011 at 2:34 PM, goodb0fh <goodb0fh@xxxxxxxxx> wrote:

/boot would be my first guess

Sent from my iPhone

On Aug 6, 2011, at 9:59 AM, Thiago Vinhas <thiago@xxxxxxxxxx> wrote:

> Hi,
>
> I'm using Xen for a few years, on diskless Intel servers. These servers boot using PXE to an iSCSI remote disk, and works just fine.
>
> Now I'm trying to do the same, but instead of using iscsi, I would like to use the server booting in a NFS root.
>
> The problem is that, after I boot the server and start Xen, when I try to start a VM, it takes fron 60 to 180 seconds to start the boot process. I tried using CentOS 5.6, CentOS 6.0 and SLES11, all with Xen 4.1.1, and it happens in all of them.
>
> I'm guessing Xen consumes a lot of I/O when trying to start a VM, and NFS maybe is a bottleneck for this. If that's the case, I could mount the specific partition in iSCSI, but I have no idea what partition it should be.
>
> Does anybody have a light on this?
>
> Thanks a lot!
> Thiago

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