[Lustre-discuss] Question on setting up fail-over

[David Noriega]

Could you describe this resource fencing in more detail? As for
regards to STONITH, the pdu already has the grubby hands of IT plugged
into it and doubt they would be happy if I unplugged them.  What about
the network management port or ILOM?

On Mon, Aug 9, 2010 at 1:08 PM, Kevin Van Maren
<Kevin.Van.Maren at oracle.com> wrote:
> On Aug 9, 2010, at 11:45 AM, David Noriega <tsk133 at my.utsa.edu> wrote:
>
>> My understanding of setting up fail-over is you need some control over
>> the power so with a script it can turn off a machine by cutting its
>> power? Is this correct?
>
> It is the recommended configuration because it is simple to understand and
> implement.
>
> But the only _hard_ requirement is that both nodes can access the storage.
>
>
>> Is there a way to do fail-over without having
>> access to the pdu(power strips)?
>
> If you have IPMI support, that can be used for power control, instead of a
> switched PDU.  Depending on the storage, you may be able to do resource
> fencing of the disks instead of STONITH.  Or you can run fast-and-loose,
> without any way to ensure the dead node is really "dead" and not accessing
> storage (at your risk).  While Lustre has MMP, it is really more to protect
> against a mount typo than to guarantee resource fencing.
>
>
>> Thanks
>> David
>>
>> --
>> Personally, I liked the university. They gave us money and facilities,
>> we didn't have to produce anything! You've never been out of college!
>> You don't know what it's like out there! I've worked in the private
>> sector. They expect results. -Ray Ghostbusters
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>



-- 
Personally, I liked the university. They gave us money and facilities,
we didn't have to produce anything! You've never been out of college!
You don't know what it's like out there! I've worked in the private
sector. They expect results. -Ray Ghostbusters