The cluster group is brought online in the remote data center (if possible) without waiting for resynchronization. The application startup process is stopped locally and HP 3PAR Cluster Extension reports a data center error. Depending on the cluster software, the application service cannot start on any system in the local data center, and the cluster software transfers the application service back to the remote data center. Use this value to provide the highest level of application service availability.

In a two-node cluster, this process does not work because the target failback system is not available. In this case, the application service must be started manually, or the ApplicationStartup object must be set to RESYNCWAIT.

RESYNCWAIT

The online operation in the local cluster group must wait until the Remote Copy volume group status is no longer in syncing state. HP 3PAR Remote Copy initiates a resynchronization of the local virtual volume based on the remote virtual volume. HP 3PAR Cluster Extension monitors the syncing process. If no copy progress is made after configured ResyncWaitTimeout value, HP 3PAR Cluster Extension returns a global error. If RESYNCWAIT has been specified for the ApplicationStartup object, the ResyncWaitTimeout object must be specified, in case HP 3PAR Cluster Extension should wait for resynchronization changes for more or less than 90 seconds, which is the default.

Files application_name.forceflag

CLX_application_name.online

If specified in a user configuration file, resource_name is the value of the APPLICATION tag; otherwise, resource_name is the value of the HP 3PAR Cluster Extension resource name.

ClusterNotifyCheckTime

Format

Integer

Description

Specifies how often HP 3PAR Cluster Extension will check for VM live migration state

 

changes.

Default

10 seconds

value

 

ClusterNotifyWaitTime

Format

Integer

Description

Specifies the amount of time that HP 3PAR Cluster Extension will monitor for VM live

 

migration state changes.

Default

5 seconds

value

 

DC_A_Hosts (Required)

Format

List

Description

This space-separated list defines the cluster nodes in data center A.

DC_B_Hosts (Required)

Format

List

Description

This space-separated list defines the cluster nodes in data center B.

APPLICATION objects 51

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HP Cluster Software manual ClusterNotifyCheckTime, ClusterNotifyWaitTime, DCAHosts Required, DCBHosts Required

Cluster Software specifications

HP Cluster Software is a robust solution designed to enhance the reliability, availability, and scalability of computing environments in enterprise settings. This software is instrumental in managing clusters of servers, providing a unified framework that allows for efficient resource management, workload distribution, and high availability.

One of the main features of HP Cluster Software is its ability to deliver high availability through failover mechanisms. In the event of a hardware or software failure, the software automatically shifts workloads from the affected node to a standby node within the cluster, minimizing downtime. This feature is critical for organizations that require continuous access to their data and applications.

Scalability is another significant characteristic of HP Cluster Software. Organizations can easily add or remove nodes from the cluster without disrupting ongoing operations. This flexibility ensures that enterprises can adapt to changing workloads and resource demands efficiently, making it suitable for environments ranging from small businesses to large data centers.

Load balancing is a key technology employed by HP Cluster Software. It intelligently distributes workloads across the available nodes, optimizing resource utilization and ensuring that no single server is overwhelmed. By balancing the load, organizations can achieve better performance and enhance the response times of applications, which are essential for user satisfaction.

HP Cluster Software supports various clustering topologies, including active-active and active-passive configurations. This versatility allows organizations to choose the architecture that best fits their operational requirements. Additionally, the software integrates seamlessly with various HP and third-party hardware and software solutions, thus providing a holistic environment for managing IT resources.

Moreover, HP Cluster Software offers centralized management tools that simplify cluster administration. Administrators can monitor cluster performance, manage workloads, and configure settings all from a single interface. This ease of use reduces the complexity often associated with managing large clusters and empowers IT teams to respond rapidly to issues.

In summary, HP Cluster Software is an essential tool for organizations looking to enhance their IT infrastructure's availability, reliability, and performance. With its failover capabilities, scalability options, load balancing technology, and centralized management features, it stands out as a comprehensive solution for modern computing challenges.