Readme for 463638

IBM Spectrum LSF 10.1 Fix 470697 Readme File

Abstract

This fix enhances the scheduler to allow to LSF to more efficiently prune its search space. As a result, scheduling cycle time is improved in some cases.

Description

Readme documentation for IBM Spectrum LSF 10.1 Fix 470697 including installation-related instructions, prerequisites and co-requisites, and list of fixes.

This fix addresses the following issue:

The LSF scheduler process (mbschd) works together with the main daemon (mbatchd) to manage job life cycles. At the beginning of each scheduling session, mbschd gets a snapshot of the cluster state from mbatchd, which includes updates on resource availability and pending jobs. The scheduler then makes scheduling decisions based on this snapshot. The decisions are published to mbatchd to act on.

A long scheduling cycle can lower cluster utilization, since resources released during one scheduling session will not be reallocated until the subsequent scheduling sessionat the earliest. Scheduling session lengths are displayed with the command: badmin perfmon view.

This enhancement improves scheduling performance by making the scheduler process more efficient at pruning its search space. In particular, this can help in some cases in clusters that configure host-based limits (lsb.resources), and guarantee policies (lsb.resources).

No configuration is needed to apply this patch.

Readme File for: IBM® Spectrum LSF

Product/Component Release: 10.1

Update Name: Fix 470697

Fix ID: LSF-10.1-build470697

Publication Date: 19 October 2017

Last Modified Date: 19 October 2017

Contents

1. Description

2. Download Location

3. Product or Components Affected

4. System Requirements

5. Installation and Configuration

6. List of Files

7. Product Notifications

8. Copyright and Trademark Information

1. List of Fixes

APAR P102331

2. Download Locations

Download Fix 470697 from the following location: http://www.ibm.com/eserver/support/fixes/

3. Product or Components Affected

Affected product or components include:

LSF/mbschd

4. System Requirements

linux2.6-glibc2.3-x86_64

linux3.10-glibc2.17-x86_64

5. Installation and Configuration

5.1 Before installation

(LSF_TOP=Full path to the top-level installation directory of LSF.)

1) Log on to the LSF master host as root

2) Set your environment:

- For csh or tcsh: % source LSF_TOP/conf/cshrc.lsf

- For sh, ksh, or bash: $ . LSF_TOP/conf/profile.lsf

5.2 Installation steps

1) Go to the patch install directory: cd $LSF_ENVDIR/../10.1/install/

2) Copy the patch file to the install directory $LSF_ENVDIR/../10.1/install/

3) Run patchinstall: ./patchinstall <patch>

5.3 After installation

1) Log on to the LSF master host as root

2) Configure parameters in lsf.conf

3) badmin mbdrestart

5.4 Uninstallation

1) Log on to the LSF master host as root

2) Go to the patch install directory: cd $LSF_ENVDIR/../10.1/install/

3) Run ./patchinstall -r <patch>

4) badmin mbdrestart

6. List of Files

mbschd

7. Product Notifications

To receive information about product solution and patch updates automatically, subscribe to product notifications on the My notifications page ( www.ibm.com/support/mynotifications) on the IBM Support website (support.ibm.com). You can edit your subscription settings to choose the types of information you want to get notification about, for example, security bulletins, fixes, troubleshooting, and product enhancements or documentation changes.

8. Copyright and Trademark Information

U.S. Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

IBM®, the IBM logo, and ibm.com® are trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at www.ibm.com/legal/copytrade.shtml.