To bring resources online:

Use Failover Cluster GUI or Cluster CLI or Microsoft PowerShell Cmdlets.

For Server Core or Hyper-V Server, use the CLI or the MMC or Microsoft PowerShell Cmdlets. For more information on using this command, see your Microsoft documentation.

Taking a resource offline

Resources are usually taken offline automatically when the service or application is taken offline. Taking a resource offline causes resources that depend on that resource to go offline.

When taking resources offline:

Use Failover Cluster GUI or Cluster CLI or Microsoft PowerShell Cmdlets.

For Server Core or Hyper-V Server, use the CLI or the MMC or Microsoft PowerShell Cmdlets. For more information on using this command, see your Microsoft documentation.

Deleting a resource

Deleting a running resource causes the resource and its dependents to go offline.

CAUTION: Deleting a running resource does not remove the resource_name.online file.

When deleting resources:

Use Failover Cluster GUI or Cluster CLI or Microsoft PowerShell Cmdlets.

For Server Core or Hyper-V Server, use the CLI or the MMC or Microsoft PowerShell Cmdlets.

For more information on deleting resources, see your Microsoft documentation.

Using Hyper-V Live Migration with HP 3PAR Cluster Extension

Live migration is a managed failover of VM resources. Live migration should be performed when all of the solution constituents are in a healthy state, all the servers and systems are running, and all the links are up. Ensure that the underlying infrastructure is in a healthy state before performing live migration.

HP 3PAR Cluster Extension has the capability of discovering unfavorable storage-level conditions for performing live migration. In response to these conditions, HP 3PAR Cluster Extension will stop or cancel the live migration process and inform the user. This is accomplished with no VM downtime. For example, if live migration is initiated while VM data residing on the storage system is still merging and not in sync, HP 3PAR Cluster Extension will proactively cancel the live migration and inform the user to wait until the disks are fully in sync. Without this feature, live migration might fail or the VM might come online in the remote data center with inconsistent data.

The HP 3PAR Cluster Extension StatusRefreshInterval property, which you can configure in a UCF for each application, specifies the time interval between consecutive array status gathering operations before the live migration to the target cluster node occurs. By adjusting this property, you can increase the probability of getting the correct HP 3PAR storage system status to ensure a successful live migration. The default StatusRefreshInterval value is 300 seconds. For more information about configuring this property, see “Setting HP 3PAR Cluster Extension properties using a UCF” (page 34).

TIP: For more information about using Hyper-V Live Migration with HP 3PAR Cluster Extension, see the white paper Live Migration across data centers and disaster tolerant virtualization architecture with HP StorageWorks Cluster Extension and Microsoft Hyper-Von the white papers website: www.hp.com/storage/whitepapers.

40 Configuring HP 3PAR Cluster Extension

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HP Cluster Software manual Using Hyper-V Live Migration with HP 3PAR Cluster Extension, Taking a resource offline

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.