users can use the CLX resource configuration utility integrated with CSV cluster resource in the Failover Cluster or use the HP 3PAR Resource Configuration Tool (Clx3PARResConfig.exe) to configure the CLX resource for CSV disk.

System resources

Monitor the system resources on a regular basis as part of Windows administration. If any system resource usage by the cluster service is reaching maximum levels, stop and then restart the cluster service. This action automatically fails over the resources and resets system resources. See the Windows cluster documentation for information about how to stop a cluster service.

An alternate method is to manually move all resources to another node in the cluster before stopping the cluster service. After all resources are successfully moved to another node, stop and then restart the cluster service; then, manually move back all resources.

Logs

If the HP 3PAR Cluster Extension log files need to be cleared and reset (for example, to reduce disk space usage), you can delete the files. HP 3PAR Cluster Extension automatically creates new log files.

NOTE: On Windows Server 2012, if VM management functionality is used by customer, the logs for this feature will be created in the same location. But the name of the file is VMClxMscs.log

TIP: Archive the log files before deleting them.

Hyper-V Live Migration log entries

In the HP 3PAR Cluster Extension log file (clxmscs.log), live migration messages include the prefix CLX_LM to help you differentiate live migration issues from HP 3PAR Cluster Extension log messages.

For example:

[10/12/09 20:13:02][2136][CLX_LM: CLXVMDISK04-App01][INFO] CLX detected that Live Migration for VM "Virtual Machine VM04" has begun.

[10/12/09 20:13:02][2136][CLX_LM: CLXVMDISK04-App01][INFO] CLX started gathering VM "Virtual Machine VM04" specific storage information.

Virtual Machine Management hosted on a Cluster Shared Volume on Windows Server 2012

Cluster Shared Volumes of Windows Server 2012, support virtualized workloads to create virtual machines on Cluster Shared Volumes in the Failover Cluster Manager. These VMs are the highly available virtual machines as these are managed by the Failover Cluster.

CSV Disk resource can be owned by one cluster node whereas highly available VMs which are created on the CSV disk can be owned by the same cluster node or any other cluster node. The node which owns the CSV disk resource is called as the co-ordinator node. In a multi-site storage array replicated environment, clustering of nodes is spread across the datacenter. For non CSV disks, the application role like VM role contains the application resource, disk resource and the CLX resource together, which means that in whichever cluster node the disk resource is online, the application resource like VM resource would be online too. Therefore, the entire application role like VM role containing the application resource, disk resource and the CLX resource together would be owned by a cluster node. With the CSV feature in place, the CSV disk can be owned by any cluster node and highly available VMs which are created on the CSV disk running on the same cluster node or the different cluster node as that of the CSV.

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