QLogic 7104-3M-CABLE User Manual
1–Introduction
Overview
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Overview
The material in this documentation pertains to a QLogic OFED cluster. A cluster is
defined as a collection of nodes, each attached to an InfiniBand™-based fabric
through the QLogic interconnect. The nodes are Linux-based computers, each
having up to 16 processors.
defined as a collection of nodes, each attached to an InfiniBand™-based fabric
through the QLogic interconnect. The nodes are Linux-based computers, each
having up to 16 processors.
The QLogic host channel adapters are InfiniBand 4X. The Double Data Rate
(DDR) QLE7240 and QLE7280 adapters have a raw data rate of 20Gbps (data
rate of 16Gbps). For the Single Data Rate (SDR) adapters, the QLE7140 and
QHT7140, the raw data rate is 10Gbps (data rate of 8Gbps). The QLE7240 and
QLE7280 can also run in SDR mode.
(DDR) QLE7240 and QLE7280 adapters have a raw data rate of 20Gbps (data
rate of 16Gbps). For the Single Data Rate (SDR) adapters, the QLE7140 and
QHT7140, the raw data rate is 10Gbps (data rate of 8Gbps). The QLE7240 and
QLE7280 can also run in SDR mode.
The QLogic adapters utilize standard, off-the-shelf InfiniBand 4X switches and
cabling. The QLogic interconnect is designed to work with all InfiniBand-compliant
switches.
cabling. The QLogic interconnect is designed to work with all InfiniBand-compliant
switches.
QLogic OFED OpenFabrics software is interoperable with other vendors’
InfiniBand host channel adapters running compatible OpenFabrics releases.
There are several options for subnet management in your cluster:
InfiniBand host channel adapters running compatible OpenFabrics releases.
There are several options for subnet management in your cluster:
Use the embedded Subnet Manager (SM) in one or more managed switches
supplied by your InfiniBand switch vendor.
supplied by your InfiniBand switch vendor.
Use a host-based Subnet Manager. QLogic provides one, QLogic Fabric
Manager, as a part of the QLogic InfiniBand Fabric Suite download.
Manager, as a part of the QLogic InfiniBand Fabric Suite download.
Use the Open source Subnet Manager (OpenSM) component of
OpenFabrics.
OpenFabrics.
Interoperability
QLogic InfiniPath participates in the standard InfiniBand subnet management
protocols for configuration and monitoring. Note that:
protocols for configuration and monitoring. Note that:
InfiniPath OpenFabrics (including Internet Protocol over InfiniBand (IPoIB))
is interoperable with other vendors’ InfiniBand adapters running compatible
OpenFabrics releases.
is interoperable with other vendors’ InfiniBand adapters running compatible
OpenFabrics releases.
The QLogic MPI stack is not interoperable with other InfiniBand host channel
adapters and target channel adapters. Instead, it uses an
InfiniBand-compliant, vendor-specific protocol that is highly optimized for
QLogic MPI and MPI over Verbs.
adapters and target channel adapters. Instead, it uses an
InfiniBand-compliant, vendor-specific protocol that is highly optimized for
QLogic MPI and MPI over Verbs.
NOTE:
If you are using the QLE7240 or QLE7280, and want to use DDR mode,
then DDR-capable switches must be used.
then DDR-capable switches must be used.