John, all,
Another thing that I would suggest is that we try using xrootd access
rather then rfio. I've been using this at Edinburgh for some time now on
our DPM. There are a few things that we need to be careful about though.
We can also consider switching off GSI authentication with DPM rfio.
However, before doing this we should check the readahead options that
are being used.
Cheers,
Greig
Gordon, JC (John) wrote, On 25/11/08 16:22:
> Greig, do you have a suggestion as to how ATLAS might use your method in
> a way that a job could run at any site?
>
> John
>
>
>> -----Original Message-----
>> From: Testbed Support for GridPP member institutes [mailto:TB-
>> [log in to unmask]] On Behalf Of Greig A. Cowan
>> Sent: 25 November 2008 16:19
>> To: [log in to unmask]
>> Subject: Re: Analysis challenge in the UK tomorrow
>>
>>
>> At Edinburgh I just set things up so that I use rfio:/dpm/path/to/file
>> to access data which bypasses any SRM communication. This is really
>> only
>> possible because I know how things are setup in here.
>>
>> Performing the SRM communications and extra GSI steps will also
>>
> explain
>
>> why the DPM head node is really busy.
>>
> C005336.
>
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