HP 3PAR Solaris Implementation Guide

HP 3PAR Priority Optimization
The HP 3PAR Priority Optimization feature introduced in HP 3PAR OS versions 3.1.2.MU2 is a
more efficient and dynamic solution for managing server workloads and can be utilized as an
alternative to setting host server I/O throttles. Using this feature, a storage administrator is able to
share storage resources more effectively by enforcing quality of service limits on the array. No
special settings are needed on the host side to obtain the benefit of HP 3PAR Priority Optimization,
although certain per target or per adapter throttle settings may need to be adjusted in rare cases.
For complete details of how to use HP 3PAR Priority Optimization (Quality of Service) on HP 3PAR
arrays, see the HP 3PAR Priority Optimization technical white paper, available at the following
website:
HP 3PAR Priority Optimization
HP 3PAR OS Persistent Ports
The HP 3PAR OS Persistent Ports (or virtual ports) feature minimizes I/O disruption during an
HP 3PAR StoreServ Storage online upgrade or node-down event (online upgrade, node reboot).
Port shutdown or reset events do not trigger this feature.
Each FC, FCoE, or iSCSI target storage array port has a partner array port automatically assigned
by the system. Partner ports are assigned across array node pairs.
HP 3PAR OS Persistent Ports allows an HP 3PAR StoreServ Storage FC, FCoE, or iSCSI port to
assume the identity (port IP address) of a failed port while retaining its own identity. Where a given
physical port assumes the identity of its partner port, the assumed port is designated as a persistent
port. Array port failover and failback with HP 3PAR OS Persistent Ports is transparent to most
host-based multipathing software, which can keep all of its I/O paths active.
NOTE: Use of HP 3PAR OS Persistent Ports technology does not negate the need for properly
installed, configured, and maintained host multipathing software.
For a more complete description of the HP 3PAR OS Persistent Ports feature, its operation, and a
complete list of required setup and connectivity guidelines, see:
• the HP Technical white paper HP 3PAR StoreServ Persistent Ports (HP document
#F4AA4-4545ENW)
• the HP 3PAR Command Line Interface Administrator’s Manual, “Using Persistent Ports for
Nondisruptive Online Software Upgrades”
Fibre Channel
Starting with HP 3PAR OS 3.1.2, the HP 3PAR OS Persistent Ports feature is supported for FC
target ports.
The Persistent Ports feature is enabled by default for HP 3PAR StoreServ Storage FC ports starting
with HP 3PAR OS 3.1.2 software and later.
Starting with HP 3PAR OS 3.1.3, the Persistent Port feature has additional functionality to minimize
I/O disruption during an array port “loss_sync” event triggered by a loss of array port connectivity
to fabric.
HP 3PAR OS Persistent Ports Setup and Connectivity Guidelines for FC
Specific cabling setup and connectivity guidelines need to be followed for HP 3PAR OS Persistent
Ports to function properly:
• HP 3PAR StoreServ Storage FC partner ports must be connected to the same FC Fabric and
switch.
• The FC fabric being used must support NPIV, and NPIV must be enabled.
• The host–facing HBAs must be configured for point-to-point fabric connection (there is no
support for direct-connect “loops”).
Setting Up and Zoning the Fabric 13