HP UX 11i Workload Management (gWLM/WLM) Software manual Combining psets and virtual partitions

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(Windows), increase the CMS database cache size by increasing the value of the com.hp.gwlm.cms.cachesize property by 25%. (The cache is more memory efficient if the size is near a power of 2. If your target cache size is close to a power of 2, round it up to the next power. For example, if your target cache size is 60,000, round it up to 66,000.)

2.Stop and restart gwlmcmsd using the following commands.

NOTE: Stopping gwlmcmsd disables HP Matrix OE visualization and Capacity Advisor.

#gwlmcmsd --stop

#gwlmcmsd

Combining psets and virtual partitions

When using psets on virtual partitions, assigning CPUs to virtual partitions by either path or cell specification can result in processes losing their processor set affiliations when CPUs are removed.

Workaround

Two workarounds are available:

•Do not assign CPUs to virtual partitions by either path or cell specification.

•Set the gWLM policy minimum for pset 0 (the default/OTHER workload) to be greater than or equal to the sum of path-specific CPUs and cell-specific CPUs.

Error during discovery of compartments

The following message might be displayed when you use the Manage New Systems wizard or the gwlm discover command:

Error during discovery of compartments.

In addition, the /var/opt/gwlm/gwlmagent.log.0 file contains the following message:

com.hp.gwlm.common.PlatformException: /usr/sbin/parstatus -w exited

with a non-zero exit status. Captured stderr is: Error: Unable to get the local partition number.

Workaround

This is most likely due to having an outdated version of the nPartition Provider software. Global Workload Manager uses a command that is made available by the nPartition Provider, which is typically in every version of HP-UX, to determine system capabilities.

You can also use the /opt/vse/bin/vseassist command to diagnose the issue. Install the latest nPartition software, even if you are not using nPartitions.

For HP-UX 11i v1, use version B.11.11.01.03.01.01 or later.

For HP-UX 11i v2 on HP 9000 servers, use version B.11.23.01.03.01.01 or later. For HP-UX 11i v2 on HP Integrity servers, use version B.11.23.01.04 or later. You can find the nPartition Provider at the following locations:

•The quarterly AR CD starting May 2005

•The Software Depot website: http://software.hp.com

Modifying Java while gWLM is running

gWLM does not support any actions (including the use of update-ux) that remove, overwrite, or otherwise modify the version of Java that gWLM is using in a managed node or CMS that is part of a deployed SRD.

Documentation or minor issues

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Contents HP Global Workload Manager 7.4 User Guide Acknowledgements Contents Support and other resources Additional configuration and administration tasksIndex Comparison of PRM, WLM, and gWLM features Benefits of using gWLMOverview GWLM OverviewScheduler fss group. gWLM manages a workload by Concepts and terms for using gWLMWould make for a workload-without actually affecting SRD GWLM management modelHow gWLM allocates CPU resources Assumptions Available interfacesFinding more gWLM information Where to find additional informationLearn about other gWLM commands Policy types Configuring gWLM to manage workloadsPolicy types Choosing a policy type Choosing a policy typeSeeing how gWLM will perform without affecting the system Using the wizardGetting started with gWLM Combining the different policy types# /opt/gwlm/bin/gwlmagent Seeing gWLM in action# perl -e ’print $$\nwhile 1 ’ & 1 Fixing the amount of CPU resources a workload gets Common uses for gWLMSetting up gWLM initial setup steps Common configuration tasksCreating a new policy Changing from advisory mode to managed modeChanging which policy is associated with a workload Editing a policyStop managing a workload Adding a new compartment or GiCAP group member to an SRDStop managing an SRD Quick Link Option Monitoring workloads and gWLM Viewing gWLM reports in monitor-Only modeMonitoring workloads High-Level viewMessage logs Monitoring gWLM from the command lineHP-UX /var/opt/gwlm/gwlmcommand.log.0 Monitoring gWLM with GlancePlus Viewing HP Systems Insight Manager eventsGeneral security topics SecuritySecuring gWLM communications Securing database communicationsSecurity Manually adjusting CPU resources Additional configuration and administration tasksSetting aside space for historical data Manually adjusting memory resourcesSetting database recovery model Setting cache size for historical configuration dataCreating a database maintenance plan Tips for backup and restoreCMS properties Setting gWLM propertiesSetting gWLM properties Agent properties # Severe # Warning # Info # Config # Fine # Finer # Finest Communications ports Controlling gWLM’s startup behavior# /opt/gwlm/bin/gwlmagent --enablestartonboot Related events How the automatic restart worksNode Failed to Rejoin SRD on Start-up event Manually clearing an SRD# gwlm undeploy --srd=SRD--force Nested partitions Nesting partitionsChanging the interval on the command line Using gWLM with Hyper-ThreadingChanging the gWLM resource allocation interval Changing the interval in HP System Insight ManagerShows a possible scenario Using gWLM with hosts on multiple LANsMultiple network interface cards Creating Golden ImagesGet the IP address configured for the host using nslookup Incorrectly configured host name or IP addressEnabling or disabling dumping core for gWLM Unable to create new native threadCore dump file is available in root directory Subscription service How to contact HPSupport and other resources Information to collect before contacting HPTypographic conventions HP authorized resellersRelated information User input Documentation feedback Compatibility with agents Limitations Global Workload Manager known issuesCompatibility with PRM and WLM Unable to build a single shared resource domainHost name aliases are not supported Making a configuration change to a large SRD is slowRare incompatibility with virtual partitions Integrity VM prevents discovery of psets and fss groups Deleting workloads takes a long timeCustom metrics lost on redeploy Information error during shutdownProcess placement using psrset is ignored Major issues Remove old configuration data from the gWLM database Documentation or minor issuesCMS is slow to respond Cell-local processors and iCAP environmentModifying Java while gWLM is running Error during discovery of compartmentsCombining psets and virtual partitions Only one SRD is allowed to be deployed Missing or unexpected historical data system clocks differSample missing at start or end of gwlmreport output SRD deployment times out and displays a blank screen Processes moved to default pset or default fss groupApplication hangs in fss group Scripts not placed in correct workloadsUnable to remove workload from nested partitions SRD Configuration of agent and CMS not synchronizedChanges in sizes in Discovery Negative current size for Nonvm Missing historical data gWLM CMS daemon/service restartedUnmanaging a VM or vPar that is on leaves SRD undeployed SRD IndexIndex

UX 11i Workload Management (gWLM/WLM) Software specifications

HP-UX 11i Workload Management (gWLM/WLM) software is an integral component of HP's premier UNIX operating system, designed to enhance system performance and resource management across diverse workloads. This advanced tool allows system administrators to monitor, control, and allocate resources effectively to achieve optimal performance, reliability, and service levels in enterprise environments.

One of the main features of gWLM/WLM is its ability to classify workloads and manage them according to specific policies set by the administrator. By using service level objectives (SLOs), administrators can define the performance criteria for various applications and workloads. gWLM continuously tracks these workloads, ensuring that they adhere to the defined SLOs, thus maintaining a high level of application performance.

The software employs resource pools, which segment resources such as CPU, memory, and I/O bandwidth among different workloads based on predefined priorities. This capability ensures that critical applications receive the resources they require, even during peak usage periods, thereby preventing resource starvation that could lead to system slowdowns or crashes.

Another significant characteristic of gWLM/WLM is its real-time monitoring and reporting capabilities. The software provides detailed insights into resource utilization, workload performance, and system health. Administrators can access this information through a user-friendly interface, allowing for informed decision-making and proactive management.

Integration with HP Serviceguard adds another layer of functionality, enabling high availability for critical applications. gWLM can orchestrate workload migration to ensure that service levels are maintained, even in the event of hardware failures or resource contention.

The technology behind gWLM/WLM is built on advanced algorithms that leverage historical data and predictive modeling to optimize resource allocation dynamically. This means that as workloads change, the system can automatically adjust resource distribution to meet performance targets without the need for constant manual intervention.

gWLM also supports integration with various enterprise management tools, enabling administrators to implement comprehensive monitoring and management strategies across the IT infrastructure. The scalability of gWLM allows organizations of all sizes to benefit from its robust workload management features, ensuring that they can adapt to changing demands in their operational environments.

In summary, HP-UX 11i Workload Management software offers a sophisticated solution for optimizing resource utilization, managing workloads effectively, and maintaining high performance in complex enterprise environments. Its comprehensive features and technologies make it an essential tool for any organization seeking to enhance their IT operations.
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