HP UX 11i Workload Management (gWLM/WLM) Software manual Concepts and terms for using gWLM

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Concepts and terms for using gWLM

Here are some concepts and terms to know when using gWLM:

Workload

The collection of processes executing within a single

 

compartment. The compartment can be an nPartition (npar),

 

a virtual partition (vPar), a Virtualization Services Platform

 

(VSP), a virtual machine provided by HP Integrity Virtual

 

Machines (hpvm), a processor set (pset), or a Fair Share

 

Scheduler (fss) group. gWLM manages a workload by

 

adjusting the system resource allocations for its compartment.

 

(For background information on nPars, vPars, VSPs, virtual

 

machines, psets, and fss groups, refer to the section “The

 

gWLM management model” (page 9).)

Compartment

An npar, a vPar, a VSP, a virtual machine, a pset, or an fss

 

group with its resource allocation being managed by gWLM.

 

Multiple compartments are grouped to form a shared

 

resource domain, or SRD. The compartments all share the

 

resources within the SRD. Each compartment holds a

 

workload and can be in only one deployed SRD. gWLM

 

manages each workload by adjusting the resource allocation

 

for its compartment.

Shared Resource Domain (SRD)

A collection of compartments that can share system

 

resources. The compartments can be nPars, vPars, VSPs,

 

virtual machines, psets, or fss groups. For example, a server

 

containing nPars can be an SRD—as long as the

 

requirements in “The gWLM management model” (page 9)

 

are met. Also, a server or an npar divided into vPars can

 

be an SRD for its vPar compartments. Similarly, a server or

 

an npar divided into virtual machines can be an SRD for its

 

virtual machine compartments.

 

gWLM allows you to nest compartments. gWLM then

 

manages resources for the various levels of compartments.

Policy

A collection of settings that instruct gWLM how to manage

 

a workload’s resources. For example, a policy can indicate

 

the amount of CPU resources a workload owns (and is

 

allocated when needed), as well as how much of those

 

resources the workload can lend to other workloads.

 

A single policy can be associated with, or applied to,

 

multiple workloads.

 

For more information on policies, see “Policy types”

 

(page 14).

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Contents HP Global Workload Manager 7.4 User Guide Acknowledgements Contents Support and other resources Additional configuration and administration tasksIndex GWLM Overview Benefits of using gWLMComparison of PRM, WLM, and gWLM features 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 typeCombining the different policy types Using the wizardSeeing how gWLM will perform without affecting the system Getting started with gWLM# /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 High-Level view Viewing gWLM reports in monitor-Only modeMonitoring workloads and gWLM Monitoring workloadsMessage logs Monitoring gWLM from the command lineHP-UX /var/opt/gwlm/gwlmcommand.log.0 Monitoring gWLM with GlancePlus Viewing HP Systems Insight Manager eventsSecuring database communications SecurityGeneral security topics Securing gWLM communicationsSecurity Manually adjusting CPU resources Additional configuration and administration tasksSetting aside space for historical data Manually adjusting memory resourcesTips for backup and restore Setting cache size for historical configuration dataSetting database recovery model Creating a database maintenance planCMS 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 in HP System Insight Manager Using gWLM with Hyper-ThreadingChanging the interval on the command line Changing the gWLM resource allocation intervalShows 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 Information to collect before contacting HP How to contact HPSubscription service Support and other resourcesRelated information HP authorized resellersTypographic conventions User input Documentation feedback Compatibility with agents Limitations Global Workload Manager known issuesCompatibility with PRM and WLM Unable to build a single shared resource domainRare incompatibility with virtual partitions Making a configuration change to a large SRD is slowHost name aliases are not supported Integrity VM prevents discovery of psets and fss groups Deleting workloads takes a long timeProcess placement using psrset is ignored Information error during shutdownCustom metrics lost on redeploy Major issues Remove old configuration data from the gWLM database Documentation or minor issuesCMS is slow to respond Cell-local processors and iCAP environmentCombining psets and virtual partitions Error during discovery of compartmentsModifying Java while gWLM is running Sample missing at start or end of gwlmreport output Missing or unexpected historical data system clocks differOnly one SRD is allowed to be deployed Scripts not placed in correct workloads Processes moved to default pset or default fss groupSRD deployment times out and displays a blank screen Application hangs in fss groupChanges in sizes in Discovery Configuration of agent and CMS not synchronizedUnable to remove workload from nested partitions SRD 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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