Last update:
Apr 1, 2000
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Distributing Data around the BaBar collaborations Objectivity Federations
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Emanuele Leonardi1,
Simon Patton2
- I.N.F.N. Roma (Italy)
- Lawrence Berkeley National Lab., Berkeley (USA)
Speaker:
Emanuele Leonardi
BaBar has a number of disjoint Objectivity federations, many of which need
to share information. For instance, to insulate the main online federation
from problems with physicists analysis jobs, the main online federation is
a separate federation from that used by physicists for their analysis.
However these two federations need to share a large portion of their data.
Similarly the regional centers of the collaboration have partial or
complete local copies of the main federations to ensure good access to the
data. It must be possible to move data created in these local federations
to be moved back into the main federations of which they are a copy.
Also, Monte Carlo production is done at many different sites but the data
in these separate federations need to be combined into a single federation
to simplify physicists access to this data.
This paper describes the set-up of the regional centers, outlines the
requirements for distributing data between the various disjoint federations
and discusses the design and implementation of the solutions that have been
applied at BaBar. It will give explicit examples of how various federations
are set up to collaborate, and outlines some of the main tools that can be
used to move the data between federations both on a local and a
geographical scale.
Presentation:  |
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