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Flit A communications cycle unit of information.
HTTP cookies Cookies provide a general mechanism that HTTP server-side
connections use to store and to retrieve information on the client side
of the connection.
main memory The memory normally associated with the main processor, that is to
say, memory on the CPU’s high speed memory bus.
main processor The main CPU (or CPUs for a multi-processor) of a node, typically an
Alpha
21264.
management network
A private network used by the RMS daemons for control and
diagnostics.
multirail system
A system that has more than one Elan card connected to each node,
each Elan card being connected to a different switch network.
multi-threaded program
A multi-threaded program is one that is constructed such that, during
its execution, multiple sequences of instructions are executed
concurrently (possibly by different CPUs). Each thread of execution
has a separate stack but otherwise they all share the same address
space.
node A system with memory, one or more CPUs and one or more Elan cards
running an instance of the operating system.
poll Loop and check on each loop whether a specified event has occurred.
rank An integer value that identifies a single process from a set of parallel
processes.
reduce Combine the results of a parallel computation into a single value.
remote memory The memory (Elan card or main) of a node when accessed by another
node over the network.
resource A set of CPUs allocated to a user to run one or more parallel jobs.
Glossary-4