Hi Jeremy,
Yes, at Edinburgh we have been seeing exactly the same behaviour. Biomed
run jobs all over the place and many of them try to access data on the
DPM here. Looking at our monitoring, the same biomed user has >75000
unique SRM interactions with our DPM over the past 48 hours. Clients
with the biomed user DN have been connecting from sites in Russia,
Holland, Taiwan and the UK. See plot of the biomed usage compared to
everyone else.
Cheers,
Greig
Coles, J (Jeremy) wrote, On 24/11/08 10:06:
>
> Dear All
>
> In the site reports for last week Durham report:
>
> “A biomed user has been transferring huge amounts of data from our SE
> (>500
>
> requests of the same 2.8GB file to a variety of worker nodes across
> Europe. Unfortunately the high bandwidth has revealed instabilities
> when transferring at close to the gigabit limit. I ticketed the user
> and they have distributed more replicas - but they are not following
> the grid data-to-cpu model and therefore will cause severe bandwidth
> issues to all sites.”
>
> Has any other site seen such a seeding exercise taking place or
> anything related?
>
> Thanks,
>
> Jeremy
>
>
> --
> Scanned by iCritical.
>
>
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