HP AXCRN3-2G User Manual

HP XC System Software Release Notes

Version 3.2

HP Part Number: A-XCRN3-2G Published: March 2008

Confidential computer software. Valid license from HP required for possession,useorcopying.Consistent with FAR 12.211 and 12.212, Commercial

Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under

vendor's standard commercial license. The information contained herein is subject to change without notice. The only warranties for HP products

and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as

constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

AMD and AMD Opteron are trademarks or registered trademarks of Advanced Micro Devices, Inc.

FLEXlm is a trademark of Macrovision Corporation.

InfiniBand is a registered trademark and service mark of the InfiniBand Trade Association.

Intel, Itanium, and Xeon are trademarks or registered trademarks of Intel Corporation in the United States and other countries.

Linux is a U.S. registered trademark of Linus Torvalds.

LSF and Platform Computing are trademarks or registered trademarks of Platform Computing Corporation.

Myrinet and Myricom are registered trademarks of Myricom, Inc.

Nagios is a registered trademark of Ethan Galstad.

The Portland Group and PGI are trademarks or registered trademarks of The Portland Group Compiler Technology, STMicroelectronics, Inc.

Quadrics and QsNetIIare registered trademarks of Quadrics, Ltd.

Red Hat and RPM are registered trademarks of Red Hat, Inc.

syslog-ng is copyrighted by BalaBit IT Security.

SystemImager is a registered trademark of Brian Finley.

TotalView is a registered trademark of Etnus, Inc.

UNIX is a registered trademark of The Open Group.

About This Document.........................................................................................................7

Intended Audience.................................................................................................................................7

Typographic Conventions......................................................................................................................7

HP XC and Related HP Products Information.......................................................................................8

Related Information................................................................................................................................9

Manpages..............................................................................................................................................12

HP Encourages Your Comments..........................................................................................................13

1 New and Changed Features......................................................................................15

1.1 Base Distribution and Kernel..........................................................................................................15

1.2 Support for Additional Hardware Models.....................................................................................15

1.3 OpenFabrics Enterprise Distribution for InfiniBand......................................................................15

1.4 HP Scalable Visualization Array.....................................................................................................15

1.5 Partition Size Limits on Installation Disk........................................................................................16

1.6 More Flexibility in Customizing Client Node Disk Partitions........................................................16

1.7 Enhancements to the discover Command.......................................................................................16

1.8 Enhancements to the cluster_config Utility....................................................................................16

1.9 System Management and Monitoring Enhancements....................................................................17

1.10 Enhancements to the OVP.............................................................................................................17

1.11 Installing and Upgrading HP XC System Software On Red Hat Enterprise Linux......................17

1.12 Support For HP Unified Parallel C................................................................................................17

1.13 Documentation Changes...............................................................................................................18

2 Important Release Information....................................................................................19

2.1 Firmware Versions...........................................................................................................................19

2.2 Patches.............................................................................................................................................19

3 Hardware Preparation.................................................................................................21

3.1 Upgrading BMC Firmware On HP ProLiant DL140 G2 and DL145 G2 Nodes..............................21

4 Software Installation On The Head Node.................................................................23

4.1 Manual Installation Required For NC510F Driver..........................................................................23

5 System Discovery, Configuration, and Imaging........................................................25

5.1 Notes That Apply Before You Invoke The cluster_prep Utility......................................................25

5.1.1 Required Task for Some NIC Adapter Models: Verify Correct NIC Device Driver

Mapping..........................................................................................................................................25

5.2 Notes That Apply To The Discover Process....................................................................................26

5.2.1 Discovery of HP ProLiant DL140 G3 and DL145 G3 Nodes Fails When Graphics Cards Are

Present.............................................................................................................................................26

5.3 Notes That Apply Before You Invoke The cluster_config Utility...................................................26

5.3.1 Adhere To Role Assignment Guidelines for Improved Availability.......................................26

5.4 Benign Message From C52xcgraph During cluster_config.............................................................26

5.5 Processing Time For cluster_config Might Take Longer On A Head Node With Improved

Availability............................................................................................................................................27

5.6 Notes That Apply To Imaging.........................................................................................................27

Table of Contents 3

5.6.1 HP ProLiant DL140 G3 and DL145 G3 Node Imaging Fails When Graphics Cards Are

Present.............................................................................................................................................27

6 Software Upgrades......................................................................................................29

6.1 Do Not Upgrade If You Want Or Require The Voltaire InfiniBand Software Stack.......................29

7 System Administration, Management, and Monitoring...........................................31

7.1 Perform A Dry Run Before Using The si_updateclient Utility To Update Nodes..........................31

7.2 Possible Problem With ext3 File Systems On SAN Storage............................................................31

8 HP XC System Software On Red Hat Enterprise Linux.............................................33

8.1 Enabling 32–bit Applications To Compile and Run .......................................................................33

9 Programming and User Environment.........................................................................35

9.1 MPI and OFED InfiniBand Stack Fork Restrictions........................................................................35

9.2 InfiniBand Multiple Rail Support....................................................................................................35

9.3 Benign Messages From HP-MPI Version 2.2.5.1.............................................................................35

10 Cluster Platform 3000................................................................................................37

11 Cluster Platform 4000................................................................................................39

12 Cluster Platform 6000................................................................................................41

12.1 Network Boot Operation and Imaging Failures on HP Integrity rx2600 Systems........................41

12.2 Notes That Apply To The Management Processor........................................................................41

12.2.1 Required Task: Change MP Settings on Console Switches...................................................41

12.2.2 MP Disables DHCP Automatically.......................................................................................41

12.2.3 Finding the IP Address of an MP..........................................................................................41

13 Integrated Lights Out Console Management Devices............................................43

13.1 iLO2 Devices In Server Blades Can Hang.....................................................................................43

14 Interconnects...............................................................................................................45

14.1 InfiniBand Interconnect.................................................................................................................45

14.1.1 enable Password Problem With Voltaire Switch Version 4.1................................................45

14.2 Myrinet Interconnect.....................................................................................................................45

14.2.1 Myrinet Monitoring Line Card Can Become Unresponsive.................................................45

14.2.2 The clear_counters Command Does Not Work On The 256 Port Switch..............................45

14.3 QsNetIIInterconnect......................................................................................................................45

14.3.1 Possible Conflict With Use of SIGUSR2................................................................................46

14.3.2 The qsnet Database Might Contain Entries To Nonexistent Switch Modules......................46

15 Documentation............................................................................................................47

15.1 Documentation CD Search Option................................................................................................47

15.2 HP XC Manpages..........................................................................................................................47

15.2.1 New device_config.8.............................................................................................................47

15.2.2 Changes to ovp.8...................................................................................................................47

4 Table of Contents

15.2.3 New preupgradesys-lxc.8......................................................................................................47

15.2.4 New upgradesys-lxc.8...........................................................................................................48

Index.................................................................................................................................51

Table of Contents 5

About This Document

This document contains release notes for HP XC System Software Version 3.2. This document contains important information about firmware, software, or hardware that might affect the system.

An HP XC system is integrated with several open source software components. Some open source software components are being used for underlying technology, and their deployment is transparent. Some open source software components require user-level documentation specific to HP XC systems, and that kind of information is included in this document when required.

HP relies on the documentation provided by the open source developers to supply the information you need to use their product. For links to open source software documentation for products that are integrated with the HP XC system, see “Supplementary Software Products” (page 9).

Documentation for third-party hardware and software components that are supported on the HP XC system is supplied by the third-party vendor. However, information about the operation of third-party software is included in this document if the functionality of the third-party component differs from standard behavior when used in the XC environment. In this case, HP XC documentation supersedes information supplied by the third-party vendor. For links to related third-party Web sites, see “Supplementary Software Products” (page 9).

Standard Linux® administrative tasks or the functions provided by standard Linux tools and commands are documented in commercially available Linux reference manuals and on various Web sites. For more information about obtaining documentation for standard Linux administrative tasks and associated topics, see the list of Web sites and additional publications provided in

“Related Software Products and Additional Publications” (page 11).

Intended Audience

The release notes are intended for anyone who installs and configures an HP XC system, for system administrators who maintain the system, for programmers who write applications to run on the system, and for general users who log in to the system to run jobs.

The information in this document assumes that you have knowledge of the Linux operating system.

Typographic Conventions

This document uses the following typographical conventions:

%, $, or #

audit(5) A manpage. The manpage name is audit, and it is located in

Command Computer output

Ctrl+x A key sequence. A sequence such as Ctrl+x indicates that you

ENVIRONMENT VARIABLE The name of an environment variable, for example, PATH. [ERROR NAME] Key The name of a keyboard key. Return and Enter both refer to the

Term The defined use of an important word or phrase.

User input

A percent sign represents the C shell system prompt. A dollar sign represents the system prompt for the Korn, POSIX, and Bourne shells. A number sign represents the superuser prompt.

Section 5. A command name or qualified command phrase. Text displayed by the computer.

must hold down the key labeled Ctrl while you press another key or mouse button.

The name of an error, usually returned in the errno variable.

same key.

Commands and other text that you type.

Intended Audience 7

Variable

The name of a placeholder in a command, function, or other syntax display that you replace with an actual value.

[ ] The contents are optional in syntax. If the contents are a list

separated by |, you can choose one of the items.

{ } The contents are required in syntax. If the contents are a list

separated by |, you must choose one of the items.

. . . The preceding element can be repeated an arbitrary number of

times. | Separates items in a list of choices. WARNING A warning calls attention to important information that if not

understood or followed will result in personal injury or

nonrecoverable system problems. CAUTION A caution calls attention to important information that if not

understood or followed will result in data loss, data corruption,

or damage to hardware or software. IMPORTANT This alert provides essential information to explain a concept or

to complete a task. NOTE A note contains additional information to emphasize or

supplement important points of the main text.

HP XC and Related HP Products Information

The HP XC System Software Documentation Set, the Master Firmware List, and HP XC HowTo documents are available at this HP Technical Documentation Web site:

http://www.docs.hp.com/en/linuxhpc.html

The HP XC System Software Documentation Set includes the following core documents:

HP XC System Software Release Notes

HP XC Hardware Preparation Guide

HP XC System Software Installation Guide

HP XC System Software Administration Guide

HP XC System Software User's Guide

QuickSpecs for HP XC System Software

Describes important, last-minute information about firmware, software, or hardware that might affect the system. This document is not shipped on the HP XC documentation CD. It is available only on line.

Describes hardware preparation tasks specific to HP XC that are required to prepare each supported hardware model for installation and configuration, including required node and switch connections.

Provides step-by-step instructions for installing the HP XC System Software on the head node and configuring the system.

Provides an overview of the HP XC system administrative environment, cluster administration tasks, node maintenance tasks, LSF® administration tasks, and troubleshooting procedures.

Provides an overview of managing the HP XC user environment with modules, managing jobs with LSF, and describes how to build, run, debug, and troubleshoot serial and parallel applications on an HP XC system.

Provides a product overview, hardware requirements, software requirements, software licensing information, ordering information, and information about commercially available software that has been qualified to interoperate with the HP XC System Software. The QuickSpecs are located on line:

http://www.hp.com/go/clusters

See the following sources for information about related HP products.

HP XC Program Development Environment

The Program Development Environment home page provide pointers to tools that have been tested in the HP XC program development environment (for example, TotalView® and other

debuggers, compilers, and so on).

http://h20311.www2.hp.com/HPC/cache/276321-0-0-0-121.html

HP Message Passing Interface

HP Message Passing Interface (HP-MPI) is an implementation of the MPI standard that has been integrated in HP XC systems. The home page and documentation is located at the following Web site:

http://www.hp.com/go/mpi

HP Serviceguard

HP Serviceguard is a service availability tool supported on an HP XC system. HP Serviceguard enables some system services to continue if a hardware or software failure occurs. The HP Serviceguard documentation is available at the following Web site:

http://www.docs.hp.com/en/ha.html

HP Scalable Visualization Array

The HP Scalable Visualization Array (SVA) is a scalable visualization solution that is integrated with the HP XC System Software. The SVA documentation is available at the following Web site:

http://www.docs.hp.com/en/linuxhpc.html

HP Cluster Platform

The cluster platform documentation describes site requirements, shows you how to set up the servers and additional devices, and provides procedures to operate and manage the hardware. These documents are available at the following Web site:

http://www.docs.hp.com/en/linuxhpc.html

HP Integrity and HP ProLiant Servers

Documentation for HP Integrity and HP ProLiant servers is available at the following Web site:

http://www.docs.hp.com/en/hw.html

Related Information

This section provides useful links to third-party, open source, and other related software products. Supplementary Software Products This section provides links to third-party and open source

software products that are integrated into the HP XC System Software core technology. In the HP XC documentation, except where necessary, references to third-party and open source software components are generic, and the HP XC adjective is not added to any reference to a third-party or open source command or product name. For example, the SLURM srun command is simply referred to as the srun command.

The location of each Web site or link to a particular topic listed in this section is subject to change without notice by the site provider.

• http://www.platform.com

Home page for Platform Computing Corporation, the developer of the Load Sharing Facility (LSF). LSF-HPC with SLURM, the batch system resource manager used on an HP XC system, is tightly integrated with the HP XC and SLURM software. Documentation specific to LSF-HPC with SLURM is provided in the HP XC documentation set.

Related Information 9

Standard LSF is also available as an alternative resource management system (instead of LSF-HPC with SLURM) for HP XC. This is the version of LSF that is widely discussed on the Platform Web site.

For your convenience, the following Platform Computing Corporation LSF documents are shipped on the HP XC documentation CD in PDF format:

— Administering Platform LSF — Administration Primer — Platform LSF Reference — Quick Reference Card — Running Jobs with Platform LSF

LSF procedures and information supplied in the HP XC documentation, particularly the documentation relating to the LSF-HPC integration with SLURM, supersedes the information supplied in the LSF manuals from Platform Computing Corporation.

The Platform Computing Corporation LSF manpages are installed by default. lsf_diff(7) supplied by HP describes LSF command differences when using LSF-HPC with SLURM on an HP XC system

The following documents in the HP XC System Software Documentation Set provide information about administering and using LSF on an HP XC system:

— HP XC System Software Administration Guide — HP XC System Software User's Guide

• http://www.llnl.gov/LCdocs/slurm/

Documentation for the Simple Linux Utility for Resource Management (SLURM), which is integrated with LSF to manage job and compute resources on an HP XC system.

• http://www.nagios.org/

Home page for Nagios®, a system and network monitoring application that is integrated into an HP XC system to provide monitoring capabilities. Nagios watches specified hosts and services and issues alerts when problems occur and when problems are resolved.

• http://oss.oetiker.ch/rrdtool

Home page of RRDtool, a round-robin database tool and graphing system. In the HP XC system, RRDtool is used with Nagios to provide a graphical view of system status.

• http://supermon.sourceforge.net/

Home page for Supermon, a high-speed cluster monitoring system that emphasizes low perturbation, high sampling rates, and an extensible data protocol and programming interface. Supermon works in conjunction with Nagios to provide HP XC system monitoring.

• http://www.llnl.gov/linux/pdsh/

Home page for the parallel distributed shell (pdsh), which executes commands across HP XC client nodes in parallel.

• http://www.balabit.com/products/syslog_ng/

Home page for syslog-ng, a logging tool that replaces the traditional syslog functionality. The syslog-ng tool is a flexible and scalable audit trail processing tool. It provides a centralized, securely stored log of all devices on the network.

• http://systemimager.org

Home page for SystemImager®, which is the underlying technology that distributes the golden image to all nodes and distributes configuration changes throughout the system.

• http://linuxvirtualserver.org

Home page for the Linux Virtual Server (LVS), the load balancer running on the Linux operating system that distributes login requests on the HP XC system.

• http://www.macrovision.com

Home page for Macrovision®, developer of the FLEXlm™ license management utility, which is used for HP XC license management.

• http://sourceforge.net/projects/modules/

Web site for Modules, which provide for easy dynamic modification of a user's environment through modulefiles, which typically instruct the module command to alter or set shell environment variables.

• http://dev.mysql.com/

Home page for MySQL AB, developer of the MySQL database. This Web site contains a link to the MySQL documentation, particularly the MySQL Reference Manual.

Related Software Products and Additional Publications This section provides pointers to Web sites for related software products and provides references to useful third-party publications. The location of each Web site or link to a particular topic is subject to change without notice by the site provider.

Linux Web Sites

• http://www.redhat.com

Home page for Red Hat®, distributors of Red Hat Enterprise Linux Advanced Server, a Linux distribution with which the HP XC operating environment is compatible.

• http://www.linux.org/docs/index.html

This Web site for the Linux Documentation Project (LDP) contains guides that describe aspects of working with Linux, from creating your own Linux system from scratch to bash script writing. This site also includes links to Linux HowTo documents, frequently asked questions (FAQs), and manpages.

• http://www.linuxheadquarters.com

Web site providing documents and tutorials for the Linux user. Documents contain instructions for installing and using applications for Linux, configuring hardware, and a variety of other topics.

• http://www.gnu.org

Home page for the GNU Project. This site provides online software and information for many programs and utilities that are commonly used on GNU/Linux systems. Online information include guides for using the bash shell, emacs, make, cc, gdb, and more.

MPI Web Sites

• http://www.mpi-forum.org

Contains the official MPI standards documents, errata, and archives of the MPI Forum. The MPI Forum is an open group with representatives from many organizations that define and maintain the MPI standard.

• http://www-unix.mcs.anl.gov/mpi/

A comprehensive site containing general information, such as the specification and FAQs, and pointers to other resources, including tutorials, implementations, and other MPI-related sites.

Related Information 11

Compiler Web Sites

• http://www.intel.com/software/products/compilers/index.htm

Web site for Intel® compilers.

• http://support.intel.com/support/performancetools/

Web site for general Intel software development information.

• http://www.pgroup.com/

Home page for The Portland Group™, supplier of the PGI® compiler.

Debugger Web Site

http://www.etnus.com

Home page for Etnus, Inc., maker of the TotalView® parallel debugger.

Software RAID Web Sites

• http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html and

http://www.ibiblio.org/pub/Linux/docs/HOWTO/other-formats/pdf/Software-RAID-HOWTO.pdf

A document (in two formats: HTML and PDF) that describes how to use software RAID under a Linux operating system.

• http://www.linuxdevcenter.com/pub/a/linux/2002/12/05/RAID.html

Provides information about how to use the mdadm RAID management utility.

Additional Publications

For more information about standard Linux system administration or other related software topics, consider using one of the following publications, which must be purchased separately:

• Linux Administration Unleashed, by Thomas Schenk, et al.

• Linux Administration Handbook, by Evi Nemeth, Garth Snyder, Trent R. Hein, et al.

• Managing NFS and NIS, by Hal Stern, Mike Eisler, and Ricardo Labiaga (O'Reilly)

• MySQL, by Paul Debois

• MySQL Cookbook, by Paul Debois

• High Performance MySQL, by Jeremy Zawodny and Derek J. Balling (O'Reilly)

• Perl Cookbook, Second Edition, by Tom Christiansen and Nathan Torkington

• Perl in A Nutshell: A Desktop Quick Reference , by Ellen Siever, et al.

Manpages

Manpages provide online reference and command information from the command line. Manpages are supplied with the HP XC system for standard HP XC components, Linux user commands, LSF commands, and other software components that are distributed with the HP XC system.

Manpages for third-party software components might be provided as a part of the deliverables for that component.

Using discover(8) as an example, you can use either one of the following commands to display a manpage:

$ man discover $ man 8 discover

If you are not sure about a command you need to use, enter the man command with the -k option to obtain a list of commands that are related to a keyword. For example:

$ man -k keyword

HP Encourages Your Comments

HP encourages comments concerning this document. We are committed to providing documentation that meets your needs. Send any errors found, suggestions for improvement, or compliments to:

feedback@fc.hp.com

Include the document title, manufacturing part number, and any comment, error found, or suggestion for improvement you have concerning this document.

HP Encourages Your Comments 13

1 New and Changed Features

This chapter describes the new and changed features delivered in HP XC System Software Version

3.2.

1.1 Base Distribution and Kernel

The following table lists information about the base distribution and kernel for this release as compared to the last HP XC release.

HP XC Version 3.1HP XC Version 3.2

Enterprise Linux 4 Update 3Enterprise Linux 4 Update 4

HP XC kernel version 2.6.9-34.7hp.XCHP XC kernel version 2.6.9-42.9hp.XC

Based on Red Hat kernel version 2.6.9-34.0.2.ELBased on Red Hat kernel version 2.6.9-42.0.8.EL

1.2 Support for Additional Hardware Models

In this release, the following additional hardware models and hardware components are supported in an HP XC hardware configuration.

• HP ProLiant servers:

— HP ProLiant DL360 G5 — HP ProLiant DL380 G5 — HP ProLiant DL580 G4 — HP ProLiant DL145 G3 — HP ProLiant DL385 G2 — HP ProLiant DL585 G2

• HP Integrity servers and workstations:

— HP Integrity rx2660 — HP Integrity rx4640 — HP xw9400 workstation

1.3 OpenFabrics Enterprise Distribution for InfiniBand

Starting with this release, the HP XC System Software uses the OpenFabrics Enterprise Distribution (OFED) InfiniBand software stack.

OFED is an open software stack supported by the major InfiniBand vendors as the future of InfiniBand support. OFED offers improved support of multiple HCAs per node. The OFED stack has a different structure and different commands from the InfiniBand stack that was used in previous HP XC releases.

See the following web page for more information about OFED:

http://www.openfabrics.org/

The HP XC System Software Administration Guide provides OFED troubleshooting information.

1.4 HP Scalable Visualization Array

HP Scalable Visualization Array (SVA) software is now included on the HP XC System Software DVD distribution media. SVA provides a comprehensive set of services for deployment of visualization applications, allowing them to be conveniently run in a Linux clustering environment.

1.1 Base Distribution and Kernel 15

The following are the key features of SVA:

• Capturing and managing visualization-specific cluster information

• Managing visualization resources and providing facilities for requesting and allocating

resources for a job in a multi-user, multi-session environment

• Providing display surface configuration tools to allow easy configuration of multi-panel

displays

• Providing launch tools, both generic and tailored to a specific application, that launch

applications with appropriate environments and display surface configurations

• Providing tools that extend serial applications to run in a clustered, multi-display

environment

See the HP XC QuickSpecs and the SVA documentation set for more information about SVA features. The SVA documentation set is included on the HP XC Documentation CD.

Because the SVA RPMs are included on the HP XC distribution media, the SVA installation process has been integrated with the HP XC installation process. The HP XC System Software Installation Guide was revised where appropriate to accommodate SVA installation and configuration procedures.

1.5 Partition Size Limits on Installation Disk

Because the installation disk size can vary, partition sizes are calculated as a percentage of total disk size. However, using a fixed percentage of the total disk size to calculate the size of each disk partition can result in needlessly large partition sizes when the installation disk is larger than 36 GB. Thus, for this release, limits have been set on the default partition sizes to leave space on the disk for other user-defined file systems and partitions.

1.6 More Flexibility in Customizing Client Node Disk Partitions

You can configure client node disks on a per-image and per-node basis to create an optional scratch partition to maximize file system performance. Partition sizes can be fixed or they can be based on a percentage of total disk size. To do so, you set the appropriate variables in the /opt/hptc/systemimager/etc/make_partitions.sh file or set the variables in user-defined files with a .part extension.

The procedure that describes how to customize client node disk partitions is documented in the HP XC System Software Installation Guide.

1.7 Enhancements to the discover Command

. The following options were added to the discover command:

• The --nodesonly option reads in the database and discover all nodes if the hardware

configuration contains HP server blades and enclosures. This option is valid only when the

--enclosurebased option is also used

• The --nothreads option runs the node discovery process without threads if the hardware

configuration contains HP server blades and enclosures. This option is valid only when the

--enclosurebased option is also used.

1.8 Enhancements to the cluster_config Utility

The cluster_config utility prompts you to specify whether you want to configure the Linux virtual server (LVS) director to act as a real server, that is, a node that accepts login sessions.

If you answer yes, the LVS director is configured to act as a login session server in addition to arbitrating and dispersing the login session connections.

If you answer no, the LVS director does not participate as a login session server; its only function is to arbitrate and disperse login sessions to other nodes. This gives you the flexibility to place

16 New and Changed Features

the login role on the head node yet keep the head node load to a minimum because login sessions are not being spawned.

This configuration choice is documented in the HP XC System Software Installation Guide.

1.9 System Management and Monitoring Enhancements

System management and monitoring utilities have been enhanced as follows:

• A new resource monitoring tool, resmon, has been added. resmon is a job-centric resource

monitoring Web page initially inspired by the open-source clumon product. resmon invokes useful commands to collect and present data in a scalable and intuitive fashion. The resmon Web pages update automatically at a preconfigured interval (120 seconds by default).

See resmon(1) for more information.

• The HP Graph Web interface has been enhanced to include a cpu temperature graph.

To access this new graph, select temperature from the Metrics pull-down menu at the top of the Web page.

1.10 Enhancements to the OVP

The operation verification program (OVP) performance health tests were updated to accept an option to specify an LSF queue. In addition, you can run two performance health tests, network_stress and network_bidirectional, on systems that are configured with standard LSF or configured with LSF-HPC with SLURM.

1.11 Installing and Upgrading HP XC System Software On Red Hat Enterprise Linux

The HP XC System Software Installation Guide contains two new chapters that describes the following topics:

• Installing HP XC System Software Version 3.2 on Red Hat Enterprise Linux

• Upgrading HP XC System Software Version 3.1 on Red Hat Enterprise Linux to HP XC

System Software Version 3.2 on Red Hat Enterprise Linux

1.12 Support For HP Unified Parallel C

This release provides support for the HP Unified Parallel C (UPC) application development environment.

HP UPC is a parallel extension of the C programming language, which runs on both common types of multiprocessor systems: those with a common global address space (such as SMP) and those with distributed memory. UPC provides a simple shared memory model for parallel programming, allowing data to be shared or distributed among a number of communicating processors. Constructs are provided in the language to permit simple declaration of shared data, distribute shared data across threads, and synchronize access to shared data across threads. This model promises significantly easier coding of parallel applications and maximum performance across shared memory, distributed memory, and hybrid systems.

See the following Web page for more information about HP UPC:

http://www.hp.com/go/upc

1.9 System Management and Monitoring Enhancements 17

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