HP UX 11i Workload Management (gWLM/WLM) Software manual Major issues

Models: UX 11i Workload Management (gWLM/WLM) Software

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iCAP compliance warning

gWLM might give the following warning:

Warning: gwlmagent cimserver error, icapd down, or icap out of compliance. First restart cimserver. Make sure icapd is running. If this error happens again, consult gwlmagent man page for steps to return to compliance.

Workaround

Verify that no partition changes (parmodify) are pending. If partition changes are pending, please restart the system. Then, either consult iCAP documentation or contact HP to return the iCAP system back to compliance.

Major issues

The following are major issues for Global Workload Manager.

gWLM fails to start with certain time zone settings

gwlmcmsd and gwlmagent can fail to start with certain time zone settings. The following message is displayed in the gwlmagent.log.0 file or the gwlmcmsd.log.0 file when you attempt to invoke either daemon:

Unable to call method, 'main', with signature, '([Ljava/lang/String;)V', in class, 'com/hp/gwlm/node/Node'. Exception in thread "main"

Workaround

Use Java 1.6 or later.

gWLM commands core dump

Attempts to run gwlm commands result in core dumps when /var is full.

Workaround

Make space available in /var.

Multiple time changes on CMS might render gWLM unusable

If the time on the CMS is changed to a point in the future, changes to the gWLM configuration are made and time on the CMS is moved back to the present; gWLM will not recognize any new changes as the latest configuration.

Workaround

Backup the CMS before performing any changes to time on the CMS system.

PHKL_39587 patch required on HP-UX 11i v3 Integrity VM hosts

The HP-UX 11i v3 (B.11.31) PHKL_39587 patch is required on an HP Integrity Virtual Machines host that is to be managed by gWLM. If the patch is not installed, communication between gWLM and the Integrity VM host might hang for one to many hours, in which event operating virtual machines might not be allocated the CPU resources they need.

Workaround

Install the HP-UX 11i v3 (B.11.31) PHKL_39587 patch on all HP Integrity Virtual Machines hosts.

Full database transaction log

If Microsoft SQL Database is used when the gWLM transaction log becomes full, the SQL Server Database Engine issues a 9002 error. The log can become full when the database is online or in recovery. If the log becomes full when the database is online, the database remains online but becomes read only and it cannot be updated. If the log is filled during recovery, the Database

62 Global Workload Manager known issues

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HP UX 11i Workload Management (gWLM/WLM) Software manual Major issues

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.