HP StorageWorks Fabric OS 5.0.0 Command Reference Guide (AA-RW1MA-TE, May 2005)

48 Fabric OS commands
Changes or displays the Advanced Performance Tuning (APT) policy.
Synopsis
aptpolicy [policy]
Availability
admin
NOTE: This command is available only on the HP StorageWorks SAN Switch 4/32.
Description
Use this command to change the performance algorithm on the switch. A number of internal parameters
are changed by the use of this command, and a detailed performance tuning discussion is beyond the
scope of this manual. The default parameters are optimal for most SAN applications, and typical
customers do not need to use this command.
When used with no arguments, this command displays a list of APT policies supported on this switch, as
well as the current policy. This can be done at any time.
The switch must be disabled before using this command to change the current policy.
Operands
This command has the following operand:
aptPolicy
policy Specifies the new APT policy. The following polices are supported:
• Port-based routing policy
With this policy, the path chosen for an ingress frame is based on:
• Ingress port on which the frame was received
• Destination domain for the frame
The chosen path remains the same if Dynamic Load Sharing (DLS) feature is
not enabled. If DLS is enabled, then a different path may be chosen on a
fabric event. Refer to dlsSet for the definition of a fabric event.
This policy may provide better ISL utilization when there is little or no
oversubscription of the ISLs.
Note that static routes are supported only with this policy.