The level-3 trigger system of the STAR experiment will in the final stage c
onsist of a farm of 24 ALPHA/Linux processors, interconnected by SCI (Scala
ble Coherent Interface). The system will perform online tracking of N(track
)greater than or equal to 8000 tracks per event (N(point)less than or equal
to 45 per track). The track data will be transfered to a global level-3 CP
U (expected data transfer rate similar or equal to 48 MB/s), performing onl
ine event analysis tasks (e.g. invariant mass reconstruction) with a design
trigger input rate of R=100 Hz (R=20 Hz for a prototype system).