IBM LoadLeveler for Linux delivers job scheduling for IBM eServer pSeries and IBM eServer xSeries platforms running Linux

IBM United States Software Announcement 204-100
May 11, 2004

 ENUS204-100.PDF (34KB)

Table of contents   Document options  
At a glance Publications
Overview Technical information
Key prerequisites Ordering information
Planned availability date Terms and conditions
Description IBM Electronic Services
Product positioning Prices
Statement of direction Order now
Offering Information  
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(Corrected on May 12, 2004)

Text revised in the Limitations section.

At a glance

IBM LoadLeveler for Linux is:

  • A subset of the LoadLeveler for AIX 5L product
  • Compatible with LoadLeveler for AIX 5L, and a heterogeneous cluster of AIX and Linux nodes is supported
  • Supported when run with Red Hat Enterprise Linux 3.0 on xSeries servers and BladeCenter Intel-based blades
  • Supported when run with SUSE LINUX Enterprise System 8 on pSeries servers

This job management program:

  • Allows users to run more jobs in less time by matching processing needs with the available resources
  • Schedules applications to clusters of pSeries, xSeries, or BladeCenter servers
  • Supports parallel MPICH jobs and parallel MPICH-GM jobs using the Myrinet switch

For ordering, contact:

Your IBM representative or IBM Americas Call Centers at 800-IBM-CALL (Reference: RE001).
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LoadLeveler® for Linux is a versatile workload management system for serial and parallel batch jobs that is focused on ease of use, efficiency, reliability, and availability.

With 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. You can run more jobs in less time because LoadLeveler matches processing needs to available resources.

  • An easy-to-use GUI builds, submits, and processes jobs, allowing end users and administrators to view the status of jobs and machines online.
  • An API allows end users to plug in their own scheduler to enable an alternate scheduling algorithm, providing flexibility.
  • LoadLeveler is better able to handle network and system outages without losing information thanks to a common daemon framework with multithreaded processes and object-oriented technologies that provides stability, reliability, and scalability.
  • Authorized users can set the overall priority of jobs and how they are scheduled, control the jobs, and gather statistics on how jobs are run.

LoadLeveler for Linux supports an interoperable environment with LoadLeveler for AIX®. When the central manager runs on AIX, AIX and Linux nodes can be mixed within the same cluster. LoadLeveler can then dispatch jobs to run on both Linux and AIX servers.
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Key prerequisites

IBM eServer (any of these):

  • pSeries® servers running SUSE LINUX Enterprise System 8
  • xSeries® servers running Red Hat Enterprise Linux 3.0
  • BladeCenter™ Intel™-based blades running Red Hat Enterprise Linux 3.0

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Planned availability date

May 28, 2004
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A network job management and job scheduling system, LoadLeveler for Linux schedules and manages jobs submitted for processing on one or more servers under its control. This could be a cluster of Linux servers or a combination of Linux and AIX servers.

LoadLeveler accepts jobs that users submit and reviews the job requirements. LoadLeveler then examines the servers under its control to determine which is best suited to run each job. The servers can be either general purpose servers or dedicated compute servers.

LoadLeveler for Linux has three interfaces that enable end users to create and submit jobs and system administrators to configure the system and control running jobs:

  • The LoadLeveler GUI provides access to basic job and administrative functions.
  • The command line interface offers system access similar to the GUI. Experienced users and administrators may find the command line interface more efficient than the GUI for job and administrative functions.
  • The API allows application programs written by customers to interact with the LoadLeveler environment.

LoadLeveler monitors each job as it moves through the system using process control daemons. However, the administrator maintains ultimate control over all LoadLeveler jobs by defining job classes that control how and when LoadLeveler runs a job. The administrator can also control how jobs move through the system by specifying the type of scheduler LoadLeveler uses. LoadLeveler has several different scheduling options; each regulates job flow using specific algorithms that balance job priority with available machine resources.

The central manager is the resource coordinator for the cluster. When running in a mixed cluster of Linux and AIX servers, an AIX server must be defined as the central manager. It manages submitted jobs to AIX and Linux servers as defined in the cluster.

When LoadLeveler administrators are configuring clusters and when users are preparing to submit jobs, they need to be aware of the machine resources available in the cluster. These resources include the number of CPUs and the amount of memory available for each job. Because resource availability can vary over time, they can be defined as consumable resources in LoadLeveler. The use of consumable resources allow users to schedule jobs based on the availability of these specific resources.

LoadLeveler for Linux supports parallel MPICH jobs and parallel MPICH-GM jobs using the Myrinet switch.

Note: MPICH is a portable implementation of MPI, developed by Argonne National Laboratory. MPICH-GM is a port of MPICH on top of GM and is supported by Myricom.
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Product positioning

LoadLeveler for Linux is an integral piece of the total system management solution. LoadLeveler provides an excellent framework for managing both serial and parallel batch workload in a single environment. Serial jobs are processed sequentially. Parallel jobs are supported using the message-passing interface provided with the Myrinet switch. With a simple modification of the user's job command files, LoadLeveler can schedule the parallel job to the appropriate servers.

LoadLeveler for Linux is ideal for users who need to submit jobs whenever necessary and not according to any preset schedule. Tivoli® Workload Scheduler is an IBM product for submitting jobs on a calendared schedule. Linux and AIX jobs can be submitted within the same LoadLeveler cluster.

LoadLeveler for Linux fits well in:

  • A cluster environment where the customer wants to exploit idle server cycles or better use existing capacity across a variety of servers
  • A Beowulf cluster environment for running massively parallel MPI applications
  • Environments where customers are new to cluster computing and need an easy-to-use, fully documented, and supported job scheduler for their emerging cluster

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Statement of direction

IBM intends to provide support for LoadLeveler for Linux running Red Hat Enterprise Linux 3.0 on pSeries servers in second half 2004.

All statements regarding IBM's plans, directions, and intent are subject to change or withdrawal without notice.


BladeCenter is a trademark of International Business Machines Corporation in the United States or other countries or both.
LoadLeveler, AIX, the e-business logo, pSeries, xSeries, and Tivoli are registered trademarks of International Business Machines Corporation in the United States or other countries or both.
Intel is a trademark of Intel Corporation.
Other company, product, and service names may be trademarks or service marks of others.

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Offering Information

Product information will be available on day of announcement through the Offering Information Web site at

Product information is available through the Passport Advantage® Web site at

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No publications are shipped with this program.

The following publications are available from the Web:

  • IBM LoadLeveler® for AIX® 5L and Linux: Using and Administering
  • IBM LoadLeveler for AIX 5L and Linux: Diagnosis and Messages Guide
  • Installation Memo for IBM LoadLeveler for AIX 5L and Linux

These displayable manuals are viewable in PDF formats from the IBM eServer® Cluster Information Center at

The IBM Publications Center

The Publications Center is a worldwide central repository for IBM product publications and marketing material with a catalog of 70,000 items. Extensive search facilities are provided. Payment options for orders are via credit card (in the U.S.) or customer number for 50 countries. A large number of publications are available online in various file formats, and they can all be downloaded by all countries free of charge.

The IBM Publications Notification System

The Publications Notification System (PNS) enables subscribers to set up profiles of interest by order number/product number. PNS subscribers automatically receive notifications by e-mail of all new publications defined in their profiles. These may then be downloaded via the Publications Center. The site is available in English and Canadian French.
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Technical information

Hardware requirements

LoadLeveler for Linux is supported on:

  • pSeries® servers running SUSE LINUX Enterprise System 8
  • xSeries® servers running Red Hat Enterprise Linux 3.0
  • BladeCenter™ Intel™-based blades running Red Hat Enterprise Linux 3.0

The following is recommended:

  • 25 MB of disk space for the LoadLeveler product code
  • A minimum of 15 MB additional disk space on each node in a cluster for local log and work files
  • A minimum of 1 GB memory (RAM) per node

Software requirements

LoadLeveler for Linux is supported on:

  • SUSE LINUX Enterprise System 8 when run on supported pSeries servers
  • Red Hat Enterprise Linux 3.0 when run on supported xSeries or BladeCenter servers

Service is required for LoadLeveler for Linux. This may be obtained by accessing "Corrective Service" from the IBM eServer Cluster Support Web site

Limitations: On xSeries servers, only IA32 is supported.

The supported scaling limit is a total of 128 nodes.

Planning information

Packaging: The LoadLeveler V3.2 program is distributed as a single package, available via CD-ROM media or electronic software distribution (ESD), on either POWER™ servers or xSeries servers. For one license, you may chose the media/download for either POWER or xSeries, not both. To order for a mixed cluster, a second license is required. License information is shipped with the product. Publications are available online.

Security, auditability, and control

LoadLeveler for Linux uses the security and auditability features of the Linux operating system.

The customer is responsible for evaluation, selection, and implementation of security features, administrative procedures, and appropriate controls in application systems and communication facilities.
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Ordering information

This product is only available via Passport Advantage. It is not available as shrinkwrap.

Product Group: IBM LoadLeveler
 Product Identifier Description         (PID)
 IBM LoadLeveler for Linux              (5724i23)
Product Category: Systems Software

LoadLeveler has one charge unit: processor. The order quantity is the number of processors on which LoadLeveler will be run. A new order includes one-year IBM Software Maintenance. Upgrades may be acquired via the IBM Software Maintenance agreement up to the current level of use authorized for the qualifying program.

Passport Advantage

Program name/description                          number
IBM LoadLeveler V3.2 Media Package for            BH010IE
 Linux on POWER
IBM LoadLeveler V3.2 Media Package for            BH011IE
 Linux on xSeries
IBM LoadLeveler V3.2 + PROC LIC+SW                D53SULL
IBM LoadLeveler V3.2 + PROC ANNUAL                E01A8LL
IBM LoadLeveler V3.2 + PROC SW MAINT              D53SVLL

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Terms and conditions

This product is only available via Passport Advantage. It is not available as shrinkwrap.

Licensing: IBM International Program License Agreement. Proofs of Entitlement (PoE) are required for all authorized use. Part number products only, offered outside of Passport Advantage, where applicable, are license only and do not include Software Maintenance.

License information form number: RHAN-L-5VZQ9U

Limited warranty applies: Yes

Warranty: This program has warranty for a minimum of one year from acquisition from IBM or authorized IBM Business Partner. The warranty provided to the customer, for at least one year from acquisition, is access to databases (read Web sites) for program information, FAQs, including any known fixes to defects, which the customer can download or obtain otherwise and install at leisure.

Program technical support: Technical support of a program product will be available for a minimum of three years from the general availability date, as long as your Software Maintenance is in effect. This Technical Support allows you to obtain assistance (via telephone or electronic means) from IBM for product-specific, task-oriented questions regarding the installation and operation of the program product. Software Maintenance also provides you with access to updates, releases, and versions of the program. Customers will be notified, via announcement letter, of discontinuance of support with 12 months notice. If you require additional technical support from IBM, including an extension of support beyond the discontinuance date, please contact your IBM representative or IBM Business Partner. This extension may be available for a fee.

Money-back guarantee: If for any reason you are dissatisfied with the program, return it within 30 days from the invoice date, to the party (either IBM or its reseller) from whom you acquired it, for a refund. This applies only to your first acquisition of the program.

Copy and use on home/portable computer: No

Volume orders (IVO): No

Passport Advantage applies: Yes, and through the Passport Advantage Web site at

Software Maintenance applies: Yes

Software Maintenance, previously referred to as Software Subscription and Technical Support, is now included in the Passport Advantage Agreement. Installation and technical support for the product announced in this letter is provided by the Software Maintenance offering of the IBM International Passport Advantage Agreement. This fee service enhances customer productivity by providing voice and/or electronic access into the IBM support organizations.

IBM includes one year of Software Maintenance with the initial license acquisition of each program acquired. The initial period of Software Maintenance can be extended by the purchase of a renewal option.

While your Software Maintenance is in effect, IBM provides you assistance for your routine, short duration installation and usage (how-to) questions, and code-related questions. IBM provides assistance via telephone and, if available, electronic access, only to your information systems (IS) technical support personnel during the normal business hours (published prime shift hours) of your IBM support center. (This assistance is not available to your end users.) IBM provides Severity 1 assistance 24 hours a day, every day of the year. For additional details, consult your IBM Software Support Guide at

Software Maintenance does not include assistance for the design and development of applications, your use of programs in other than their specified operating environment, or failures caused by products for which IBM is not responsible under this agreement.

For more information, about the Passport Advantage Agreement, refer to the IBM International Passport Advantage Agreement Software Announcement 201-202 , dated July 10, 2001, or visit the Passport Advantage Web site at

IBM operational support services — SoftwareXcel: No

AIX/UNIX® Upgrade Protection applies: No

Entitled Upgrade for current AIX/UNIX Upgrade Protection licensees: No

iSeries™ Software Subscription applies: No

Variable charges apply: No

Educational allowance available: Not applicable
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IBM Electronic Services

IBM Global Services has transformed its delivery of hardware and software support services to put you on the road to higher systems availability. IBM Electronic Services is a Web-enabled solution that provides you with an exclusive, no-additional-charge enhancement to the service and support on the IBM eServer. You should benefit from greater system availability due to faster problem resolution and preemptive monitoring. IBM Electronic Services is comprised of two separate, but complementary, elements: IBM Electronic Services news page and IBM Electronic Service Agent™.

IBM Electronic Services news page provides you with a single Internet entry point that replaces the multiple entry points traditionally used by customers to access IBM Internet services and support. By using the news page, it enables you to gain easier access to IBM resources for assistance in resolving technical problems.

The IBM Electronic Service Agent is no-additional-charge software that resides on your IBM eServer system. It is designed to proactively monitor events and transmit system inventory information to IBM on a periodic customer-defined timetable. The IBM Electronic Service Agent tracks system inventory, hardware error logs, and performance information. If the server is under a current IBM maintenance service agreement or within the IBM Warranty period, the Service Agent automatically reports hardware problems to IBM. Early knowledge about potential problems enables IBM to provide proactive service that maintains higher system availability and performance. In addition, information collected through the Service Agent will be made available to IBM service support representatives when they are helping answer your questions or diagnosing problems.

To learn how IBM Electronic Services can work for you, visit

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Contact your IBM representative for charges information for this announcement.
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Order now

To order, contact the Americas Call Centers or your local IBM representative.

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

 Phone:     800-IBM-CALL (426-2255)
 Fax:       800-2IBM-FAX (242-6329)
 Mail:      IBM Americas Call Centers
            Dept:  IBM CALL, 11th Floor
            105 Moatfield Drive
            North York, Ontario
            Canada M3B 3R1
 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.


Redbooks, BladeCenter, POWER, iSeries, and Electronic Service Agent are trademarks of International Business Machines Corporation in the United States or other countries or both.
Passport Advantage, AIX, LoadLeveler, the e-business logo, eServer, pSeries, and xSeries are registered trademarks of International Business Machines Corporation in the United States or other countries or both.
Intel is a trademark of Intel Corporation.
UNIX is a registered trademark of the Open Company in the United States and other countries.
Other company, product, and service names may be trademarks or service marks of others.

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