PAR Technologies V5 manual See ParaStation Logger

		to store it to a given address. The rest of the jobs is done by this controller
		without producing further load to the CPU.
		Obviously this concept helps to disburden the CPU from work which is not
		its first task and thus gives more power to solve the actual application.
Forwarder		See ParaStation Forwarder.
Logger		See ParaStation Logger.
Master Node		The evaluation of temporary node lists while spawning new tasks is done
		only by one particular psid(8) within the cluster. The node running this
		daemon is called master node.
		The master node is dynamically selected within the cluster and may
		change, if the current master node is no longer available. Election is based
		on the node IDs, refer to parastation.conf(5).
Network Interface Card		The physical device which connects a computer to a network. Examples
		are Ethernet cards (which are nowadays often found to be on board) or
		Myrinet cards.
NIC		See Network Interface Card.
Non-Uniform	memory	Non-Uniform memory access describes the fact that for some
access (NUMA)		multiprocessor design the access time to the memory depends on the
		location of this memory. Within this designs, the memory is typically closely
		attached to a CPU. CPUs have access to memory attached to other CPUs
		using additional logic inducing additional latency. Therefore the access
		time for different memory addresses may vary.
Parallel Task		A bunch of processes distributed within the cluster forming an instance
		of a parallel application. E.g. a MPI program running on several nodes
		of a cluster can only act as a whole but consists of individual processes
		on each node. ParaStation knows about their relationship and can handle
		them as a distributed parallel task running on the cluster.
		Sometimes also referred as job.
ParaStation Logger		The counterpart to the ParaStation Forwarder. This process receives all
		output collected by the forwarder processes and sends it to the final
		destination, stdout or stderr. Furthermore input to the ParaStation task is
		forwarded to a specific process.
		The first process of the task started usually converts to the logger
		processes after spawning all the other processes of the parallel task.
ParaStation Forwarder		Collects output written by ParaStation controlled processes to stdout or
		stderr and sends it to the ParaStation Logger.
		Furthermore the forwarder controls the process and sends information
		about its exit status to the local daemon.
PMI		Process Manager Interface: protocol to standardize startup of tasks of a
		parallel job. Implemented in mpd and ParaStation5 psid.
Process		The atomic part of a Parallel Task. A process is at first a standard Unix
		process. Since ParaStation knows about its membership in a parallel task,
		it can be handled in a peculiar way if an event takes place on some other
		node (e.g. another process of the task dies unexpectedly, a signal is send
		to the task, etc.).

92 ParaStation5 Administrator's Guide