Hi Alastair,
Nah, usually we just wing it, don't declare any downtime at all and
hope for the best.
But honestly if I can't guarantee all the jobs will survive and I have
to drain a CE, the downtime starts once users can't submit to it
anymore, even though the CE is still up, just 'Draining'.
Cheers,
Daniela
On 21 November 2013 15:59, Alastair Dewhurst <[log in to unmask]> wrote:
> Hi
>
> It seems that the Tier 2s do not work in the same way as the Tier 1 with regards to downtimes. For the Tier 1 a downtime means the service is down. If you need to upgrade your storage element and this requires a short downtime of the service, are you saying you would schedule a 48 hour downtime and drain all your queues just for this?!
>
> At Tier 2s the only jobs that can only run at that site would be specific user analysis work. The assumption is that users can't think for themselves, so in advance of a downtime their work would be moved elsewhere, hence the long drain time for analysis jobs.. The work that can run elsewhere would continue to run at the site and if it fails then it can always be run elsewhere.
>
> Alastair
>
>
>
> On 21 Nov 2013, at 15:26, Ewan MacMahon <[log in to unmask]>
> wrote:
>
>>> -----Original Message-----
>>> From: Testbed Support for GridPP member institutes [mailto:TB-
>>> [log in to unmask]] On Behalf Of Alastair Dewhurst
>>
>>> I feel this is excessive and could cause problems for users who would like
>>> to use their local site but are blocked because their site is going into
>>> downtime next week.
>>>
>> Leaving aside the other points for a moment, surely the sensible logic
>> here would be to send jobs that can run elsewhere, elsewhere, but still
>> submit jobs that can only run at that one site? After all, if you submit
>> something and it doesn't work, you're no worse off than if you'd not
>> submitted it.
>>
>> Ewan
--
Sent from the pit of despair
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