Last update:
Apr 1, 2000
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Evaluation of Objectivity/AMS on the Wide Area Network
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Youhei Morita,
Hiroyuki Sato
High Energy Accelerator Research Organization (KEK)
Speaker:
Hiroyuki Sato
As the number of physicists increases and will be spread over the
world in the coming generations of HEP experiments, the needs to
distribute the obtained data near to the physicists' home institute
also increases. Thus the importance of the effective utilization of
the wide area network (WAN) increases at unprecedented scale.
In this report we present the details of behavior and the performance of
Objectivity/Advanced Multithred Server (AMS) on the dedicated link with
relatively large latency.
This link is a part of Japan-Europe-Gamma (Global Architecture for
MultiMedia Access) project which connects Europe and Japan
with a 2 Mbps ATM network.
The large latency of the satellite network link gave us a unique
opportunity to test the distributed data analysis in the WAN
environment. We have measured the performances of remote database
access and database replication option of Objectivity/DB using the
satellite link. By analysing the TCP/IP packets, several ways of
improving the distributed database transactions were found.
We discuss some optimal use cases of the distributed object database
in the WAN HEP data analysis environment.
Presentation:  | Short Paper:  |
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