\subsection {Offsite Computing} 

In order to fully exploit the computing facilities 
available in Canada to generate MC sets (see above)
or perform physics analyses we need to simplify offsite operation
of the CDF simulation and reconstruction programs. As our
team grew with the addition of physicists and
programmers from Alberta group we have undertaken 
additional service tasks designed to facilitate offsite computing.
These activities are outlined in this section.

\subsubsection{Service Activities in the CDF Database Group}

Hamilton's service work involved upgrading the tools used to monitor
offline database usage and develop software tools to assist in offsite
database monitoring.  The goal of this monitoring effort is to ensure
the CDF offline database meets the heavy demands of the collaboration
without interruption due to an overload failure.  The bulk of the work
is determining which users are putting the highest demands on the
database and then determining if that demand can be reduced without
sacrificing the user's physics goals.  This work has been crucial
to CDF's ability to harness off-site computing resources as we move
into the era of Grid computing.

\subsubsection{Activity on SAM}

At present, prototype installations of the CDF CAF (Central Analysis
Facility) and SAM (Sequential Access to Metadata) Grid servers are
installed at Alberta and are integrated with the THOR Linux cluster.
Both systems are fully kerberized to comply with Fermilab
computing security policies. Once both the remote CAF and SAM stations
have been fully tested, the JIM (Job and Information Management) system
of the CDF Grid installation will be added to the Alberta
infrastructure. 

In addition to the CDF SAM Grid installation, Caron is contributing
to performance monitoring software for the central CDF CAF
system.  Performance information is collected using the Ganglia
distributed monitoring and execution system, allowing for the eventual
display of information from the federations of clusters and Grids that
are part of the CDF SAM Grid.

