Summary of present status of QCD clusters

QCD Cluster systems have been installed and used by many groups within the last two years
Number of nodes and processors reaches O(500)
But: Number and size of QCD cluster systems small compared to TOP500 systems
Network cost can eat up a substantial part of the budget
GigE mesh system can run at < 1 $/Mflop single precision sustained for Wilson fermions (1/2002)
Budapest Architecture as model for QCD clusters ?

QCD Cluster systems have been installed and used by many groups within the last two years