IBM Spectrum LSF 10.1 Fix 537142 Readme File

Abstract

P103356. This patch partially fix the issue that job is dispatched by mistake due to inaccurate total available memory.

Description

Readme documentation for IBM Spectrum LSF 10.1 Fix 537142 including installation-related instructions, prerequisites and co-requisites, and list of fixes.

This fix partially addresses following issue:

Job may be dispatched by mistake due to an inaccurate value of the total available memory.

Before this fix, LSF calculates the total available memory using following formula:

total_available = free_mem - reserved_mem

The LIM periodically reports the free_mem value, and sbatchd periodically reports the reserved_mem value, but these two values are not synchronized. Therefore, this value is not accurate if the memory usage of the job changes steeply and rapidly.

After this fix, the formula changes to:

total_available = MIN(free_mem - reserved_mem, max_mem - allocated_mem)

where max_mem is the maximum physical memory of host, and allocated_mem is the memory job requested(used + reserved). This does not completely eliminate the problem, but ensures that LSF will block the job dispatch if the total requested memory exceeds the maximum value on the host. In other cases, if all the jobs’ request memory does not exceed the maximum value, the behavior remains unchanged, and the job might still be dispatched by mistake.

Readme File for: IBM® Spectrum LSF
Product/Component Release: 10.1
Update Name: Fix 537142
Fix ID: LSF-10.1-build537142
Publication Date: 14 Jan 2020
Last Modified Date: 14 Jan 2020

Contents

1. List of Fixes

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

P103356

2. Download Locations

Download Fix 537142 from the following location: http://www.ibm.com/eserver/support/fixes/

3. Product or Components Affected

Affected product or components include:

LSF/mbschd

LSF/mbatchd

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

5.3 After installation

1. Log on to the LSF master host as root

2. Run 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

4. Run badmin mbdrestart

6. List of Files

mbschd

mbatchd

7. Product Notifications

To receive information about product solution and patch updates automatically, subscribe to product notifications on the My notifications page (http://www.ibm.com/support/mynotifications) on the IBM Support website http://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

©Copyright IBM Corporation 2020

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 http://www.ibm.com/legal/copytrade.shtml.