Q-Logic IB6054601-00 D Switch User Manual


 
E – Glossary
E-2 IB6054601-00 D
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.