Dell PowerStore 5200T EMC PowerStore Host Configuration Guide - Page 88

Post-Configuration Steps - Using the PowerStore System

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● load_bal_policy - I/O load balancing policy: This parameter must be set with the default value of "round-robin" to set the Round-Robin (RR) policy for MPIO for devices presented from PowerStore. Using this policy, I/O operations are balanced across all available paths. ● path_fail_secs - Timeout in seconds before declaring a LUN path offline: This parameter must be set with the default value of 120 seconds. NOTE: The man page of scsimgr_esdisk(7) provides a list of parameters related to HP-UX native multipathing. Post-Configuration Steps - Using the PowerStore System This topic describes the post-configuration steps using the PowerStore system. After the host configuration is completed, you can use the PowerStore storage from the host. You can create, present, and manage volumes accessed from the host via PowerStore Manager, CLI , or REST API. Refer to the PowerStore Manager Online Help, CLI Reference Guide, or REST API Reference Guide for additional information. Presenting PowerStore Volumes to the HP-UX Host This topic describes presenting PowerStore volumes to the HP-UX host. When adding host groups and hosts to allow HP-UX hosts to access PowerStore volumes, specify HP-UX as the operating system for the newly-created hosts. NOTE: Setting the host's operating system is required for optimal interoperability and stability of the host with PowerStore storage. You can adjust the setting while the host is online and connected to the PowerStore cluster with no I/O impact. NOTE: Refer to the PowerStore Configuring Volumes Guide for additional information. Creating a file system About this task File system configuration and management are out of the scope of this document. NOTE: Some file systems may require you to properly align the file system on the PowerStore volume. It is recommended to use specified tools to optimally match your host with application requirements. NOTE: Creating a file system formatting with UNMAP enabled on a host connected to PowerStore may result in an increased amount of write I/Os to the storage subsystem. When possible, it is highly recommended to disable UNMAP during file system creation. Disabling UNMAP can be done when using the Veritas Volume Manager on the HP-UX host. However, when using the HP-UX native volume manager, this recommendation is not applicable as UNMAP is not supported in this case. To disable UNMAP during file system creation (only when using Veritas Volume Manager): Steps 1. Access the HP-UX host using SSH as root. 2. Run the following vxdisk command to temporarily disable UNMAP for the targeted device on the host (before creating the file system): # vxdisk set reclaim=off "disk name" 88 Host Configuration for HP-UX

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●
load_bal_policy
- I/O load balancing policy: This parameter must be set with the default value of "round-robin" to
set the Round-Robin (RR) policy for MPIO for devices presented from PowerStore. Using this policy, I/O operations are
balanced across all available paths.
●
path_fail_secs
- Timeout in seconds before declaring a LUN path offline: This parameter must be set with the default
value of 120 seconds.
NOTE:
The man page of scsimgr_esdisk(7) provides a list of parameters related to HP-UX native multipathing.
Post-Configuration Steps - Using the PowerStore
System
This topic describes the post-configuration steps using the PowerStore system.
After the host configuration is completed, you can use the PowerStore storage from the host.
You can create, present, and manage volumes accessed from the host via PowerStore Manager, CLI , or REST API. Refer to the
PowerStore Manager Online Help
,
CLI Reference Guide
, or
REST API Reference Guide
for additional information.
Presenting PowerStore Volumes to the HP-UX Host
This topic describes presenting PowerStore volumes to the HP-UX host.
When adding host groups and hosts to allow HP-UX hosts to access PowerStore volumes, specify
HP-UX
as the operating
system for the newly-created hosts.
NOTE:
Setting the host's operating system is required for optimal interoperability and stability of the host with PowerStore
storage. You can adjust the setting while the host is online and connected to the PowerStore cluster with no I/O impact.
NOTE:
Refer to the
PowerStore Configuring Volumes Guide
for additional information.
Creating a file system
About this task
File system configuration and management are out of the scope of this document.
NOTE:
Some file systems may require you to properly align the file system on the PowerStore volume. It is recommended
to use specified tools to optimally match your host with application requirements.
NOTE:
Creating a file system formatting with UNMAP enabled on a host connected to PowerStore may result in an
increased amount of write I/Os to the storage subsystem. When possible, it is highly recommended to disable UNMAP
during file system creation. Disabling UNMAP can be done when using the Veritas Volume Manager on the HP-UX host.
However, when using the HP-UX native volume manager, this recommendation is not applicable as UNMAP is not supported
in this case.
To disable UNMAP during file system creation (only when using Veritas Volume Manager):
Steps
1.
Access the HP-UX host using SSH as
root
.
2.
Run the following
vxdisk
command to temporarily disable UNMAP for the targeted device on the host (before creating the
file system):
# vxdisk set reclaim=off "disk name"
88
Host Configuration for HP-UX