HP 3PAR StoreServ Cluster Extension Software Administrator Guide

properties you enter are not validated, so you must enter the property values accurately, and
verify them against the HP 3PAR StoreServ Cluster Extension documentation.
• On Windows Server 2012/2012 R2 Failover Cluster, you cannot use the MMC to remotely
configure the CLX resource on which CSV disk is dependent. Therefore, in Windows
2012/2012 R2 Server Core machine, you have to launch HP 3PAR StoreServ Resource
Configuration Tool (Clx3PARResConfig.exe) to configure the CLX resource for the CSV
disk. In non-servercore Windows Server 2012/2012 R2, you can use the CLX resource
configuration utility integrated with CSV cluster resource in the Failover Cluster or use the HP
3PAR StoreServ 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 StoreServ Cluster Extension log files need to be cleared and reset (for example, to
reduce disk space usage), you can delete the files. HP 3PAR StoreServ Cluster Extension
automatically creates new log files.
NOTE: On Windows Server 2012/2012 R2, 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.
Virtual Machine Management hosted on a Cluster Shared Volume on
Windows Server 2012/2012 R2
Cluster Shared Volumes of Windows Server 2012/2012 R2, 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.
If the highly available VMs are running on a cluster node which is in a different datacenter then
the VMs will run in the redirected-access mode. This is because, the replicated disk in the datacenter
where VM is running is usually presented to the cluster node as read-only on the storage array.
Which means the I/O operations of the VMs on to the CSV disk is carried over the IP network to
Virtual Machine Management hosted on a Cluster Shared Volume on Windows Server 2012/2012 R2 53