What does an I/O node look like?
The I/O nodes are Alpha Server 1200’s running Linux. • How much disk is available on Cplant now? Available disk is system dependent. • Is HiPPI available for this system? HiPPI is not available for Cplant. • Is there any way to get information about what is going on in my program without instrumenting my code by hand? Not currently. • What is the clock rate on the PCI bus? The clock rate of the PCI bus is 33 MHZ. • What is the hardware latency for sending messages? What is the software latency? Check the Cplant performance page. • How large is the message header for interprocessor messages? The message header requires 64 bytes for all messages. • What binary format is used for data storage in files? The DEC Alpha uses the little endian format. • Can message passing be used to communicate with processors external to Cplant? MPI is supported as a message-passing library on the compute partition of Cplant, but off-machine connections for applications running on the compute partition are n
