HP UX 11i Workload Management (gWLM/WLM) Software manual Deleting workloads takes a long time

Page 60

result in a high enough number of events that the performance of the System Insight Manager CMS is adversely affected.

Workaround

The following options are available as workarounds:

Option 1 For systems managed by gWLM that are running HP-UX 11i v3, install the patches PHCO_36126 and PHSS_36078. (These patches are included in the September 2007 Operating Environment Update Release.) A fix to EMS hardware monitors is available with the September 2007 Operating Environment Update Release. Even with these patches and fixes, there is still one event generated for each change in CPU count.

For systems managed by gWLM that are running HP-UX 11i v2, upgrade to the June 2007 Operating Environment Update Release.

Option 2 Upgrade to System Insight Manager C.05.01.00.01.xx on the CMS. This version of System Insight Manager does not, by default, subscribe to these events and will not have a performance degradation.

Option 3 If you want to subscribe to events, set up automatic event purging in System Insight Manager.

For more information about any of these workarounds, see the System Insight Manager documentation (available from http://www.hp.com/go/hpsim).

Deleting workloads takes a long time

Once a request to delete a workload is issued, it can take a long time (several minutes) to complete the deletion.

Workaround

Remove old historical monitoring and configuration data from the gWLM database by entering the following command:

#gwlm history --truncate --truncate=<CCYY/MM/DD>

If you prefer not to trim the database, you can delete multiple workloads simultaneously using the gwlm delete command.

For more information, see gwlm(1M).

Integrity VM prevents discovery of psets and fss groups

When the gWLM agent is installed on a system that has Integrity VM installed, discovery operations report only Integrity VM compartments even if psets and fss groups are present.

Workaround

To discover psets or fss groups on the system, you must remove Integrity VM.

Only workloads with managed siblings can be added to SRDs with nested partitions

Using the gWLM command-line interface, you cannot add a workload to an SRD that has nested partitions unless a sibling of that workload is already managed in that SRD.

Workaround

This is not an issue when you use the gWLM interface in System Insight Manager. Simply follow the instructions in Step 1 of the Manage Systems and Workloads wizard (reached by selecting Create→Shared Resource Domain), and select the set of hosts to include in a single SRD.

Configurations with Psets nested in virtual partitions rejected with vPars versions earlier than vPars A.03.05

gWLM does not support nesting psets in virtual partitions when the vPars version is earlier than vPars A.03.05. However, it has not always rejected such configurations. gWLM 4.0 and later does reject these configurations though. So, configurations you used with gWLM 2.x or gWLM 3.x can be rejected when you begin using gWLM 4.0 (and later) agents. Given such a

60 Global Workload Manager known issues

Page 59 Page 61
Image 60
Page 59 Page 61
Contents HP Global Workload Manager 7.4 User Guide Acknowledgements Contents Additional configuration and administration tasks Support and other resourcesIndex Benefits of using gWLM Comparison of PRM, WLM, and gWLM featuresOverview GWLM OverviewConcepts and terms for using gWLM Scheduler fss group. gWLM manages a workload byWould make for a workload-without actually affecting GWLM management model SRDHow gWLM allocates CPU resources Available interfaces AssumptionsWhere to find additional information Finding more gWLM informationLearn about other gWLM commands Configuring gWLM to manage workloads Policy typesPolicy types Choosing a policy type Choosing a policy typeUsing the wizard Seeing how gWLM will perform without affecting the systemGetting started with gWLM Combining the different policy typesSeeing gWLM in action # /opt/gwlm/bin/gwlmagent# perl -e ’print $$\nwhile 1 ’ & 1 Common uses for gWLM Fixing the amount of CPU resources a workload getsCommon configuration tasks Setting up gWLM initial setup stepsChanging from advisory mode to managed mode Creating a new policyEditing a policy Changing which policy is associated with a workloadAdding a new compartment or GiCAP group member to an SRD Stop managing a workloadStop managing an SRD Quick Link Option Viewing gWLM reports in monitor-Only mode Monitoring workloads and gWLMMonitoring workloads High-Level viewMonitoring gWLM from the command line Message logsHP-UX /var/opt/gwlm/gwlmcommand.log.0 Viewing HP Systems Insight Manager events Monitoring gWLM with GlancePlusSecurity General security topicsSecuring gWLM communications Securing database communicationsSecurity Additional configuration and administration tasks Manually adjusting CPU resourcesManually adjusting memory resources Setting aside space for historical dataSetting cache size for historical configuration data Setting database recovery modelCreating a database maintenance plan Tips for backup and restoreSetting gWLM properties CMS propertiesSetting gWLM properties Agent properties # Severe # Warning # Info # Config # Fine # Finer # Finest Controlling gWLM’s startup behavior Communications ports# /opt/gwlm/bin/gwlmagent --enablestartonboot How the automatic restart works Related eventsManually clearing an SRD Node Failed to Rejoin SRD on Start-up event# gwlm undeploy --srd=SRD--force Nesting partitions Nested partitionsUsing gWLM with Hyper-Threading Changing the interval on the command lineChanging the gWLM resource allocation interval Changing the interval in HP System Insight ManagerUsing gWLM with hosts on multiple LANs Shows a possible scenarioCreating Golden Images Multiple network interface cardsIncorrectly configured host name or IP address Get the IP address configured for the host using nslookupUnable to create new native thread Enabling or disabling dumping core for gWLMCore dump file is available in root directory How to contact HP Subscription serviceSupport and other resources Information to collect before contacting HPHP authorized resellers Related informationTypographic conventions User input Documentation feedback Compatibility with agents Global Workload Manager known issues LimitationsUnable to build a single shared resource domain Compatibility with PRM and WLMMaking a configuration change to a large SRD is slow Rare incompatibility with virtual partitionsHost name aliases are not supported Deleting workloads takes a long time Integrity VM prevents discovery of psets and fss groupsInformation error during shutdown Process placement using psrset is ignoredCustom metrics lost on redeploy Major issues Documentation or minor issues Remove old configuration data from the gWLM databaseCell-local processors and iCAP environment CMS is slow to respondError during discovery of compartments Combining psets and virtual partitionsModifying Java while gWLM is running Missing or unexpected historical data system clocks differ Sample missing at start or end of gwlmreport outputOnly one SRD is allowed to be deployed Processes moved to default pset or default fss group SRD deployment times out and displays a blank screenApplication hangs in fss group Scripts not placed in correct workloadsConfiguration of agent and CMS not synchronized Changes in sizes in DiscoveryUnable to remove workload from nested partitions SRD Missing historical data gWLM CMS daemon/service restarted Negative current size for NonvmUnmanaging a VM or vPar that is on leaves SRD undeployed Index SRDIndex

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.
Top Page Image Contents