Q-Logic IB6054601-00 D Manuel D’Utilisation

E – Glossary

E-2

IB6054601-00 D

Q

For Global Identifier. Used for routing between different 
InfiniBand subnets.

For Globally Unique Identifier for the InfiniPath chip. 
Equivalent to Ethernet MAC address.

Same as front end node.

For Host Channel Adapter. HCAs are I/O engines 
located within processing nodes, connecting them to 
the InfiniBand fabric. 

Same as mpihosts file. Not the same as the /etc/hosts 
file.

A specification that defines a connector and form factor 
for HyperTransport-enabled daughtercards and EATX 
motherboards.

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. 

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. 

For iSCSI Extensions for RDMA. An upper layer 
protocol.

For kernel Direct Access Provider Library.kDAPL is the 
kernel mode version of the DAPL protocol.

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. 

Same as front end node.

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.