Re: [Xen-users] NFS goes down, XEN hangs

["Fajar A. Nugraha" <list@xxxxxxxxx>]

I think your mail is intended for Antonio. Forwarded to the list.

-- 
Fajar

On Mon, Aug 22, 2011 at 10:00 AM, Andrew Wells <agwells0714@xxxxxxxxx> wrote:
> If I got this correct. You are using xen to host nfs severs that you are
> using to netboot other xen machines? And if a nfs server goes down the
> associated netbooted machines become unresponsive?
>
> I found this behavior all the time in literal ( not virtual ) environments
> so I doubt its xen. I would instead use highly available nfs instead. And
> maybe not use a virtual machine to host the nfs.
>
> On Aug 21, 2011 10:46 PM, "Fajar A. Nugraha" <list@xxxxxxxxx> wrote:
>> On Mon, Aug 22, 2011 at 9:27 AM, Antonio Pina (antonio.pina)
>> <antonio.pina@xxxxxxxxxxx> wrote:
>>> Thank you for your answer.
>>>
>>> I understand and agree with your point but it's not the case. As soon as
>>> Server1 comes back, the NFS directory becomes available again (ls -l
>>> /server1 works). The CPU is low as usual and I can use some commands like
>>> "xl list",
>>
>> the default nfs behaviour does that
>>
>>> but now other commands, like "w" I said before.
>>
>> You might be able to get better help from other people with more nfs
>> expertise. My best guess is that "w" is somehow trying to interact
>> with the process accessing the stale nfs mount (at least "strace w"
>> shows it's accessing /proc/[pid]/stat), and since the process is
>> uninterruptible "w" has to wait (thus the appearance of "hang").
>>
>> --
>> Fajar
>>
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>> http://lists.xensource.com/xen-users
>

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