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Operating Systems AIX ISCSI poor performance 1.5MB/s fresh install AIX7.1 Post 302977139 by hicksd8 on Wednesday 13th of July 2016 06:52:03 AM
Old 07-13-2016
iSCSI performance can be greatly affected by a number of factors.

One of the major ones is the maximum payload configured. Turning on jumbo packets if both adapters support it is usually a good start.

There are other BIOS settings on FC adapters that also affect performance.
What adapters are you using?

Also, there may be the usual I/O system settings of write-thru vs write-back to consider.

A quick search of the IBM bible yielded this:
IBM Knowledge Center Error
 

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scconf_transp_adap_qfe(1M)				  System Administration Commands				scconf_transp_adap_qfe(1M)

NAME
scconf_transp_adap_qfe - configure the qfe transport adapter DESCRIPTION
Note - Beginning with the Sun Cluster 3.2 release, Sun Cluster software includes an object-oriented command set. Although Sun Cluster software still supports the original command set, Sun Cluster procedural documentation uses only the object-oriented command set. For more infor- mation about the object-oriented command set, see the Intro(1CL) man page. You can configure qfe Ethernet adapters as cluster transport adapters. These adapters can only be used with transport type dlpi. The qfe Ethernet adapter connects to a transport switch or to another Ethernet adapter on a different node. In either case, the connection is made through a transport cable. When a transport switch is used and the endpoints of the transport cable are configured by using scconf, scinstall, or other tools, you are asked to specify a port name on the transport switch. You can provide any port name, or accept the default, as long as the name is unique for the switch. The default is to set the port name to the node ID hosting the adapter at the other end of the cable. There are no user configurable properties for cluster transport adapters of this type. SEE ALSO
Intro(1CL), clinterconnect(1CL), clnode(1CL), scconf(1M), scinstall(1M), qfe(7d) Sun Cluster 3.2 4 May 2006 scconf_transp_adap_qfe(1M)
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