On 19/11/12 17:14, Alessandra Forti wrote:
>
> /Discussion point (mainly for atlas): In
> https://ggus.eu/ws/ticket_info.php?ticket=86334
From the ticket mentioned, it looks like several sites have network
issues to BNL.
In the ticket, I note that Wahid has set the parameters in
fasterdata.es.net. These parameters have served QMUL very well - and
I've strongly encouraged lots of sites to use them. However, some time
ago, RHUL followed my suggestion to use these parameters and their
performance went down (much to my surprise).
My stab in the dark was that sack/dsack and firewalls could be the
problem - but IIRC, RHUL was just about to receive a new firewall, which
might have solved the problem.
I had a quick look at the stats - and it's odd that sites see better
transfers to TAIWAN (which is further away).
Perhaps someone (Brian?) could post a summary table of site transfer
performances to/from Tier-1s, along with what has been tried, and
whether perfsonar sees the same thing.
Chris
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