HP 3PAR VMware ESX Implementation Guide

Table Of Contents
HP 3PAR Priority Optimization
The HP 3PAR Priority Optimization feature introduced as of HP 3PAR OS version 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 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 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 Priority Optimization (Quality of Service) on HP 3PAR arrays, please read
the HP 3PAR Priority Optimization technical white paper available on 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 multi-pathing 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 following:
HP Technical white paper HP 3PAR StoreServ Persistent Ports (HP document
#F4AA4-4545ENW)
This document is available on the following HP SC website:
HP Support Center
HP 3PAR Command Line Interface Administrator’s Manual, “Using Persistent Ports for
Nondisruptive Online Software Upgrades
This document is available on the following HP SC website:
HP Support Center
Fibre Channel over Ethernet
NOTE: For information regarding the Persistent Ports feature for an FCoE initiator to FC target
configuration (FCoE to FC switched), see “Configuring the HP 3PAR StoreServ Storage for Fibre
Channel” (page 8).
Starting with HP 3PAR OS 3.1.3, the HP 3PAR OS Persistent Ports feature is supported for FCoE
target ports (FCoE end-to-end configurations).
Starting with HP 3PAR OS 3.1.3 software and above, the HP 3PAR OS Persistent Ports feature is
enabled by default for HP 3PAR StoreServ Storage FCoE ports during node-down events.
36 Configuring the HP 3PAR StoreServ Storage for FCoE