Speaker
Dr
Hiroyuki Matsunaga
(ICEPP, University of Tokyo)
Description
A Tier-2 regional center is running at the University of Tokyo in Japan.
This center receives a large amount of data of the ATLAS experiment
from the Tier-1 center in France. Although the link between the two centers
has 10Gbps bandwidth, it is not a dedicated link but is shared with
other traffic, and the round trip time is 280msec. It is not easy
to exploit the available bandwidth for such a link, so-called
long fat network. We performed data transfer tests by using gridftp
in various combinations of the parameters, such as the number
of parallel streams and the TCP window size. In addition,
we have gained experience of the actual data transfer
in our production system where the Disk Pool Manager (DPM) is used
as the Storage Element and the data transfer is controlled
by the File Transfer Service (FTS).
We report results of the tests and the daily activity, and
discuss the improvement of the data transfer throughput.
| Presentation type (oral | poster) | oral |
|---|
Primary author
Dr
Hiroyuki Matsunaga
(ICEPP, University of Tokyo)
Co-authors
Prof.
Hiroshi Sakamoto
(ICEPP, University of Tokyo)
Dr
Ikuo Ueda
(ICEPP, University of Tokyo)
Dr
Tadaaki Isobe
(ICEPP, University of Tokyo)
Prof.
Tetsuro Mashimo
(ICEPP, University of Tokyo)
