All performance timings were obtained on a homogeneous collection of 24 dedicated 70 MHz Sun SPARCstation 5 computers, each with 97,968K of main memory. Each machine was connected to both a 10 Mb/second and a 100 Mb/second Ethernet network. The 100 Mb/second network, shared only by the 24 machines, was used by the distributed implementation of LSI++ to communicate between the nodes of the parallel machine. Since the disks containing the document collections were not local to the 24-machine cluster, all file access occurred over the 10 Mb/second network. In addition, communication between lsiRemote and both lsiBackend and plsiBackend took place over the 10 Mb/second Ethernet network.