Note #2: These hotfixes also apply to virtual machines that are running the Microsoft MPIO stack inside the virtual machine. Open the Windows Start menu or a Run command and type mpiocpl. The first tab lists the MPIO Devices, a default device is listed as “Vendor 8Product 16”, it is safe to leave this entry.
They are not necessary for virtual machines that are not using the Microsoft MPIO stack .. The MPIO Policy defines how the host distributes IOs across the available paths to the storage.
Most people tend to under estimate their storage needs which presents several problems.
As available free space shrinks, the fragmentation of files increase which directly affects performance.
Last but not least, Hyper-V failover clustering has perfect scalability.
Once you have another server that you’re willing to add to the system, it won’t require difficult reconfigurations or any downtime, and it will be added to the cluster easily on the fly with the help of a system wizard.
Server Manager can’t control CD/DVD drives or MPIO policies (unless I missed something) but it can do everything else.
As you probably know, the systems I use for all the things I do in this blog are from our sub-00 cluster document. The third is running a GUI version of Windows Server and hosts the storage for the cluster.
These hotfixes have been tested by Pure engineering to prevent issues we have observed with loss of access to LUNs during a reboot of a controller during an upgrade of purity.The term means that VMs should be available, regardless of the availability of the physical host it is running at.There are some specific methods for ensuring HA of the VMs.However, once you’ve connected to a LUN on Fibre Channel or i SCSI storage, it is treated the same way.You have the option of using the Disk Management MMC console, but this is the 2012 era, and Server Manager is the current tool.Virtualization isn’t famous just because of the easier management of backup and restore procedures compared to those for physical systems.It has other advantages, and one of them is definitely VM’s High Availability (HA).Actual Storage Performance How you connect depends on entirely on how the storage is presented. Since this post is likely to be long anyway, I’ve decided to show only GUI methods.I’ve asked Jeffery Hicks to write a matching post that shows the Power Shell equivalents.The Round Robin (RR) policy distributes IOs evenly across all Active/Optimized paths.A newer MPIO policy, Least Queue Depth (LQD), is similar to round robin in that IOs are distributed across all available Active/Optimized paths, however it provides some additional benefits.