出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：CRAB (CMS Remote Analysis Builder) is the tool used by CMS to enable running physics analysis
in a transparent manner over data distributed across many sites. It abstracts out the interaction
with the underlying batch farms, grid infrastructure and CMS workload management tools, such
that it is easily usable by non-experts.
CRAB can be used as a direct interface to the computing system or can delegate the user task to
a server. Major efforts have been dedicated to the client-server system development, allowing the
user to deal only with a simple and intuitive interface and to delegate all the work to a server.
The server takes care of handling the users jobs during the whole lifetime of the users task. In
particular, it takes care of the data and resources discovery, process tracking and output handling.
It also provides services such as automatic resubmission in case of failures, notification to the
user of the task status, and automatic blacklisting of sites showing evident problems beyond what
is provided by existing grid infrastructure.
The CRAB Server architecture and its deployment will be presented, as well as the current status
and future development. In addition the experience in using the system for initial detector
commissioning activities and data analysis will be summarized.
