Gordon, JC (John) wrote:
> Olivier, I am sitting next to Nick Brook and he says that lhcb
> production jobs should not run as sgm. Is this happening at other sites?
>
When checking the gridmapfile I can find only 3 sgm users.
Alex could you tell us when you saw a lot of lhcb sgm jobs ? When I look
now i only see normal lhcb
Olivier.
> Can you tell me the DN of the user being mapped to sgm, if that doesn't
> break your data security policy:-) Nick thinks the gridmapfile
> generation may not be correct.
>
> John
>
>> -----Original Message-----
>> From: Testbed Support for GridPP member institutes
>> [mailto:[log in to unmask]] On Behalf Of Olivier van der Aa
>> Sent: 23 May 2006 15:49
>> To: [log in to unmask]
>> Subject: shared experiment area load
>>
>> Dear All,
>>
>> At QMUL we have a load problem with the experimental shared area.
>> The farm is running around 900 jobs and the nfs server serving the
>> experimental area is overloaded.
>>
>> The result of that is that lhcb jobs sits for a long time on the wn
>> waiting for data (mainly libraries).
>>
>> We would like to know how this is solved at ral, manchester where the
>> size is similar. We where thinking of setting up a set of pbs
>> slots for
>> the sgm to have rw access. The other nodes would just have a
>> copy on the
>> local disk or access through several nfs servers.
>>
>> I think the problem with the small set of wn having rw access is that
>> lhcb is sending a lot of jobs via one user who is sgm. Most of those
>> jobs do not write to the experimental software area but they
>> would stack
>> to wait for the wn to be freed.
>>
>> We are keen to have your experience on that topic.
>>
>> Cheers, Olivier.
>>
>> --
>> - O. van der Aa - Imperial College London -
>> - LT2 Technical Coordinator -
>> - tel: +442075947810, +442071005426 -
>> - SIP: [log in to unmask] -
>> - fax: +442078238830 -
>> - http://surl.se/agtu -
>>
>
--
- O. van der Aa - Imperial College London -
- LT2 Technical Coordinator -
- tel: +442075947810, +442071005426 -
- SIP: [log in to unmask] -
- fax: +442078238830 -
- http://surl.se/agtu -
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