Q-Logic IB6054601-00 D manual Gid

E – Glossary

Q

GID	For Global Identifier. Used for routing between different
	InfiniBand subnets.
GUID	For Globally Unique Identifier for the InfiniPath chip.
	Equivalent to Ethernet MAC address.
head node	Same as front end node.
HCA	For Host Channel Adapter. HCAs are I/O engines
	located within processing nodes, connecting them to
	the InfiniBand fabric.
hosts file	Same as mpihosts file. Not the same as the /etc/hosts
	file.
HTX	A specification that defines a connector and form factor
	for HyperTransport-enabled daughtercards and EATX
	motherboards.
InfiniBand	Also referred to as IB. An input/output architecture used
	in high-end servers. It is also a specification for the
	serial transmission of data between processors and I/O
	devices. InfiniBand typically uses switched,
	point-to-point channels. These channels are usually
	created by attaching host channel adapters (HCAs) and
	target channel adapters (TCAs) through InfiniBand
	switches.
IPoIB	For Internet Protocol over InfiniBand, as per the
	OpenFabrics standards effort. This protocol layer
	allows the traditional Internet protocol (IP) to run over
	an InfiniBand fabric.
iSER	For iSCSI Extensions for RDMA. An upper layer
	protocol.
kDAPL	For kernel Direct Access Provider Library.kDAPL is the
	kernel mode version of the DAPL protocol.
latency	The delay inherent in processing network data. In terms
	of MPI, it is the time required to send a message from
	one node to another, independent of message size.
	Latency can be further split into sender and receiver
	processing overheads, as well as wire and switch
	overhead.
launch node	Same as front end node.
layered driver	A driver that does not directly manage any target
	devices. The layered driver calls another driver’s
	routines, which in turn manages the target devices.

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