Q-Logic IB6054601-00 D manual Mtrr

E – Glossary

Q

MTRR	For Memory Type Range Registers. MTRR For
	"Memory Type Range Registers". Used by the
	InfiniPath driver to enable write combining to the
	InfiniPath on-chip transmit buffers. This improves write
	bandwidth to the InfiniPath chip, by writing multiple
	words in a single bus transaction (typically 64). Applies
	only to x86_64 systems.
MTU	For Maximum Transfer Unit. The largest packet size
	that can be transmitted over a given network.
multicast group	A mechanism that a group of nodes use to
	communicate amongst either other. It is an efficient
	mechanism for broadcasting messages to many nodes,
	as messages sent to the group are received by all
	members of the group without the sender having to
	explicitly send it to each individual member (or even
	having to know who the members are.) Nodes can join
	or leave the group at any time.
node file	Same as hostsfile.
node program	Each individual process that is part of the parallel MPI
	job. The machine on which it is executed is called a
	node.
OpenIB	The previous name of OpenFabrics.
OpenFabrics	The open source InfiniBand protocol stack.
OpenMP	Specification that provides an open source model for
	parallel programming that is portable across shared
	memory architectures from different vendors.
OpenSM	Open source SM (Subnet Manager) that provides basic
	functionality for subnet discovery and activation.
PCIe	For PCI Express. Based on PCI concepts and
	standards, PCIe uses a faster serial connection
	mechanism.
RDMA	For Remote Direct Memory Access. A communications
	protocol that enables data transmission from the
	memory of one computer to the memory of another
	without involving the CPU. The most common form of
	RDMA is over InfiniBand.
RPM	For Red Hat Package Manager. A tool for packaging,
	installing, and managing software for Linux
	distributions.

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