Readme file for IBM® Spectrum LSF 10.1 Fix 601752
Abstract
P104972. Fix to allow dynamic servers to efficiently move to ok status after running the lsadmin reconfig command on IBM Cloud.
Description
Readme documentation for IBM® Spectrum LSF 10.1 Fix 601752 including installation-related instructions, prerequisites and co-requisites, and list of fixes.
This fix addresses the following issue:
Dynamic servers are very slow to move to ok status after running the lsadmin reconfig command in an IBM Cloud environment. This fix introduces a new parameter to resolve this issue.
Syntax:
LSF_UDP_TO_TCP_THRESHOLD=integer
Configure LSF_UDP_TO_TCP_THRESHOLD in the lsf.conf file
to the MTU size of your network. After the packet is compressed, if the packet
size is still greater than this parameter, LSF will switch to use TCP. When not
configured, LIM UDP communications will not be switched to TCP. If you
configure this parameter too small, performance can decrease as many LIM
communications will use TCP instead of UDP. If you configure the parameter too
large, you can see dropping of packets depending on your network configuration.
When not configured, LIM UDP communications will not be switched to TCP.
The minimum supported value for LSF_UDP_TO_TCP_THRESHOLD is 1500.
As a best practive, when using the LSF_UDP_TO_TCP_THRESHOLD parameter, also:
- Set LSF_ANNOUNCE_MASTER_TCP_WAITTIME to be 600 seconds.
- Do not use or remove LSF_SEND_CONFINFO_TCP_THRESHOLD settings
-
Do not use or
remove LSF_CALL_LIM_WITH_TCP settings, or set it to N or n.
Readme file for: IBM® Spectrum LSF
Product or component release: 10.1
Update name: Fix 601752
Fix ID: LSF-10.1-build601752
Publication date: 17 November 2023
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
P104972
2. Download locations
Download fix 601752 from the following location: https://www.ibm.com/support/fixcentral
3. Product or components affected
Affected product or components include:
LSF/lim
LSF/lsload
LSF/lshosts
4. System requirements
linux2.6-glibc2.3-x86_64
linux3.10-glibc2.17-x86_64
5. Installation and configuration
Before you install
LSF_TOP is the full path to the top-level installation directory of LSF.
1. You must have LSF 10.1 Fix Pack 12 or above installed before installing this fix. Download this fix pack from IBM Fix Central (https://www.ibm.com/support/fixcentral) and search for build600488. Contact IBM LSF Support if you have any questions or problems with installing Fix Pack 12.
2. Starting in LSF 10.1 Fix Pack 13, the default values of the following three GPU parameters are changed to:
LSF_GPU_AUTOCONFIG=Y
LSB_GPU_NEW_SYNTAX=extend
LSF_GPU_RESOURCE_IGNORE=Y
If you have Fix Pack 13 installed, the above GPU parameters not configured in the lsf.conf configuration file will take the default values above, and the parameters already configured in the lsf.conf file will not be affected.
If you want to keep the former GPU behavior, and if any of the three parameters are missing in the lsf.conf configuration file, you must explicitly configure the following default settings that are defined in Fix Pack 12 or earlier:
LSF_GPU_AUTOCONFIG=N
LSB_GPU_NEW_SYNTAX=N
LSF_GPU_RESOURCE_IGNORE=N
3. Log on to the LSF management host as the LSF cluster primary administrator and set the LSF cluster environment.
4. Run lsadmin limshutdown all
Installation steps
1. Log on to the LSF management host as root.
2. Set the LSF cluster environment:
- For csh or tcsh: % source LSF_TOP/conf/cshrc.lsf
- For sh, ksh, or bash: $ . LSF_TOP/conf/profile.lsf3. Go to the install directory of the fix: cd $LSF_ENVDIR/../10.1/install/
4. Copy the fix file to the install directory: $LSF_ENVDIR/../10.1/install/
5. Run patchinstall: ./patchinstall <fix>
After you install
1. Log on to the LSF management host as the LSF cluster primary administrator and set the LSF cluster environment.
2. Configure LSF_UDP_TO_TCP_THRESHOLD in the lsf.conf file
to the MTU size of your network.
As a best practice, when using the LSF_UDP_TO_TCP_THRESHOLD parameter, also:
· Set LSF_ANNOUNCE_MASTER_TCP_WAITTIME to be 600 seconds.
· Do not use or remove LSF_SEND_CONFINFO_TCP_THRESHOLD settings
· Do not use or remove LSF_CALL_LIM_WITH_TCP settings, or set it to N or n.
3. Run lsadmin limstartup all
Uninstallation
1. Log on to the LSF management host as root and set the LSF cluster environment.
2. Go to the install directory of the fix: cd $LSF_ENVDIR/../10.1/install/
3. Run ./patchinstall -r <fix>
4. Log on to the LSF management host as the LSF cluster primary administrator and set the LSF cluster environment.
5. Run lsadmin limshutdown all
6. Run lsadmin limstartup all
6. List of files
lim
lsload
lshosts
7. Product notifications
To receive information about product solution and fix 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
©Copyright IBM Corporation 2023
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.