Multi-Queue Feature Of Hitachi Gigabit Fibre Channel Adapter - Hitachi GVX-CC64G*BX User Manual

Multi-queue feature of Hitachi Gigabit
Fibre Channel Adapter
About Multi-queue feature of Hitachi
Gigabit Fibre Channel Adapter
If you setup SCSI-MQ feature to enabled on SUSE Linux Enterprise Server, the OS has
more than one hardware queue for one SCSI device and improve the parallelism of I/O
in the OS. To correspond to SCSI-MQ feature,HITACHI Gigabit Fibre Channel Adapter
Linux driver supports the unique Multi-queue in order to increase the number of the
queues in the FC-HBA device driver layer and improve the degree of the parallelism. By
enabling this feature, HITACHI Gigabit Fibre Channel adapter Linux driver creates its
own queue. As the result, FC-HBA device driver layer also performs Multi-queue
operation to further improve the performance and reduce the CPU usage rate
Support requirement of Multi-queue
feature for Hitachi Gigabit Fibre
Channel Adapter
This feature becomes be valid practicable at the environment meeting all the following
indicated conditions.
(1) Using 16Gbps FC Adapter
(2) Unusing NPIV feature
(3) Unusing LPAR manager
(4) Either the following connection configuration (i) or (ii)
(i) FC-Switch connection configuration, Connection Type is Point to Point and
Multiple PortID is Disable
(ii) Storage direct connection configuration, Connection Type is Point to Point and
Multiple PortID is Enable
About Connection Type and Multiple Port ID refer to Hitachi Gigabit Fibre Channel
Adapter UserPortID is BIOS/EFI Edition) for details.
(5) Supported SCSI-MQ feature. Please refer to "Support requirement of SCSI-MQ
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