HP UX 11i Workload Management (gWLM/WLM) Software manual Getting started with gWLM, Tabs and menus

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Combining the different policy types

Each workload in an SRD must have a policy. Starting with gWLM A.02.00.00.07, you can use any combination of the policy types within an SRD.

Seeing how gWLM will perform without affecting the system

gWLM provides an advisory mode that allows you to see how gWLM will approximately respond to a given SRD configuration—without putting gWLM in charge of your system’s resources. Using this mode, you can safely gain a better understanding of how gWLM works. In addition, you can check that your policies behave as expected—with minimal effect on the system.

Advisory mode is not available for SRDs containing virtual machines, psets, or fss groups due to the nature of these compartments.

Once you are comfortable with an SRD, change its mode to Managed to let gWLM manage resource allocation for the compartments in the SRD.

For information on changing modes, refer to “Changing from advisory mode to managed mode” (page 22).

Getting started with gWLM

gWLM is typically accessed through System Insight Manager. For information on the gWLM command-line interface, see gwlm(1M).

After performing the necessary gWLM daemon (or service) configuration as described in the HP Matrix Operating Environment Software Installation and Update Guide, the quickest way to start using gWLM to manage new systems is to use the Manage Systems and Workloads wizard, as described in the following text.

Before you start the wizard though, decide:

•Which systems you want to manage with gWLM

•Whether you want to manage your workloads by migrating CPU resources among nPars, vPars, VSPs, virtual machines, processor sets, or fss groups. (CPU resource migration among nPars with spare capacity is simulated using the HP Instant Capacity product, as explained in the section “The gWLM management model” (page 9).)

Tabs and menus

The controls shown in Figure 1 appear at the top of the Global Workload Manager screen.

Figure 1 Top controls of the Global Workload Manager screen

1The System Insight Manager menu bar

2 The HP Matrix OE visualization tabs

3 The HP Matrix OE visualization menu bar

These menu bars will be referenced later.

Using the wizard

To start the wizard:

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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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