B Global Workload Manager known issues

This appendix contains the limitations and known issues for the Global Workload Manager.

Limitations

The following are limitations for Global Workload Manager.

Incorrect workload name for NONVM workload

gWLM supports managing VSPs that has both vPars and HPVMs configured.

When you create a NONVM workload for a VSP which has both vPar and HPVM guests configured, it is added as part of an SRD. Sometimes, the NONVM workload name is found to be incorrect.

Workaround

When you create an SRD, make sure to rename the NONVM workload as NONVM irrespective of the name displayed. This is generally of the format:<hostname>.NONVM . Ensure to attach the same policy for all NONVM workloads across all SRDs.

NOTE: The real time and historical reports for NONVM are not collected appropriately. This will be fixed in the upcoming release of gWLM.

SRD size error message displayed when creating SRDs

When an SRD is created with a compartment having an initial size of n cores and the policy of the compartment's workload is set to a fixed policy of size less than n, gWLM displays a validation failure error message. For example, if an SRD is created with a vPar of size four cores and the vPar workload's policy is set to Fixed_2 (Fixed policy of size two cores), the following error message is displayed:

Validation failure for <SRD name>.

Requested size is 4.0 cores and only 2.0 cores could be allocated. Requested SRD size may be inconsistent with SRD configuration.

Workaround

Set the workload fixed policy size equal to or greater than the compartment size.

Management of migrated VMs or vPars not supported

gWLM does not support managing VMs or vPars (v6.x) that are migrated online. Workaround

None

Unpredictable management when removing GiCAP group members

If you have removed hosts from a GiCAP group before removing them from an SRD, management of the SRD becomes unpredictable. You might not be able to modify the SRD or perform a normal undeploy, in which case you must force an undeploy, delete the SRD, and re-create it.

Workaround

Unmanage any group members before removing them from the GiCAP group.

Localization behaviors

Starting with the 4.0 release, gWLM has been localized into Japanese. However:

When managing a gwlmagent version prior to 4.0, some error messages are still displayed in English

Events reported to System Insight Manager are reported in English regardless of the browser locale.

Limitations 57

Page 57
Image 57
HP UX 11i Workload Management (gWLM/WLM) Software manual Global Workload Manager known issues, Limitations

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.