IBM Parallel Environment and IBM TWS LoadLeveler add additional Linux operating system support

IBM United States Software Announcement 211-147
May 3, 2011


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IBM® Parallel Environment for Linux® and IBM Tivoli® Workload Scheduler (TWS) LoadLeveler® for Linux have expanded support for Linux operating systems:

  • Parallel Environment for Linux adds support for Red Hat Enterprise Linux (RHEL) 5.5 running on IBM Power Systems™ servers, support for RHEL 6 running on Power Systems and IBM System x® servers, and support for SUSE Linux Enterprise Server (SLES) 11 SP1 running on System x servers.
  • Tivoli Workload Scheduler (TWS) LoadLeveler for Linux adds support for RHEL 6 running on Power Systems and System x servers and SLES 11 SP1 running on System x servers.

For ordering, contact your IBM representative, an IBM Business Partner, or IBM Americas Call Centers at 800-IBM-CALL (Reference: RE001).



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Overview
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IBM Parallel Environment (IBM PE) for Linux is a high-function development and execution environment for parallel applications. IBM PE for Linux can offer high performance computing users a tool for creating and using parallel applications with a familiar look and feel.

IBM TWS LoadLeveler for Linux is a versatile workload management system for serial and parallel batch jobs that schedules applications to clusters of IBM servers. TWS LoadLeveler supports load balancing for interactive parallel operating environment sessions, and focuses on parallel job scheduling and scalability.

IBM PE for Linux, V5.2.2 has been updated to support running the RHEL 5.5 and RHEL 6 operating system on Power Systems servers and the SLES 11 SP1 and RHEL 6 operating system on IBM System x servers.

TWS LoadLeveler for Linux, V4.1.1 has been updated to support running the RHEL 6 operating system on Power Systems servers and the SLES 11 SP1 and RHEL 6 operating system on IBM System x servers.



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Key prerequisites
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IBM Power Systems (POWER6™ and POWER7™)

  • Red Hat Enterprise Linux 5.5 (IBM PE only, no LoadL support)
  • Red Hat Enterprise Linux 6
  • SUSE Linux Enterprise Server 11

IBM System x (servers and blades)

  • Red Hat Enterprise Linux 5.4
  • Red Hat Enterprise Linux 6
  • SUSE Linux Enterprise Server 11


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Planned availability date
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May 27, 2011



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Description
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The following IBM PE functions can now be run with the RHEL 5.5 operating system on Power Systems servers, offering scalability and performance:

  • Support for additional parallel programming APIs
  • New environment variables designed to improve performance
  • Enhanced flexibility in choosing the number of Message Passing Interface - Input/Output (MPI-IO) agents and their placements, which can improve MPI-IO performance
  • Scaling improvements for collective communication
  • Flexibility in choice for resource managers, including allocation of nodes for user space jobs to run without any resource manager

This newly supported environment is available with IBM PE for Linux V5.2.2.

Notes:

  • Running IBM PE on RHEL 5.5 on POWER is limited to running over IP and shared memory and does not include support for the IBM HPC Toolkit. Clients looking for these features would need to upgrade their system to RHEL 6.
  • Running IBM PE and TWS LoadLeveler on SLES 11 on System x provides full User Space support with the exception of checkpoint/restart and affinity. For HPC Toolkit, only hardware counter, MIO, and MPI profiling are supported.

With TWS LoadLeveler, end users can view a cluster of systems as a single computational resource, dispatching jobs and balancing the workload across various systems in the network with optimum productivity.

TWS LoadLeveler for Linux supports an interoperable environment with LoadLeveler for AIX®. AIX and Linux nodes can be mixed within the same cluster. LoadLeveler can then dispatch jobs to run on servers running both the AIX operating system and the Linux operating systems identified herein.

With this update, LoadLeveler adds support on System x servers running SLES11 and adds RHEL 6 support on Power Systems and System x servers. No functional restrictions are added.

Accessibility by people with disabilities

A US Section 508 Voluntary Product Accessibility Template (VPAT) containing details on accessibility compliance can be requested at

http://www.ibm.com/able/product_accessibility/index.html


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Reference information
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Refer to Software Announcement 210-004, dated June 08, 2010.



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Product number
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  5765-PEL
  5724-I23
 


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Order now
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To order, contact the Americas Call Centers or your local IBM representative, or your IBM Business Partner.

To identify your local IBM representative or IBM Business Partner, call 800-IBM-4YOU (426-4968).

Phone:      800-IBM-CALL (426-2255)
Fax:        800-2IBM-FAX (242-6329)
For IBM representative: callserv@ca.ibm.com

For IBM Business Partner: pwswna@us.ibm.com

Mail:       IBM Teleweb Customer Support
            ibm.com® Sales Execution Center, Americas North
            3500 Steeles Ave. East, Tower 3/4
            Markham, Ontario
            Canada
            L3R 2Z1

Reference: RE001

The Americas Call Centers, our national direct marketing organization, can add your name to the mailing list for catalogs of IBM products.


Note: Shipments will begin after the planned availability date.
Trademarks

Power Systems, POWER6 and POWER7 are trademarks of IBM Corporation in the United States, other countries, or both.

IBM, Tivoli, LoadLeveler, System x, AIX and ibm.com are registered trademarks of IBM Corporation in the United States, other countries, or both.

Linux is a registered trademark of Linus Torvalds in the United States, other countries, or both.

Other company, product, and service names may be trademarks or service marks of others.

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