Users Guide

Solutions Overview Guide 21
The general guidance on the amount of physical memory is the total of the
following:
• For the parent partition: 2GB of physical memory is recommended
• For each child partition: Amount of physical memory allocated to each VM
+ 32MB memory overhead for the first 1GB of memory allocated to the
VM + 8MB memory overhead for each additional 1GB of memory
allocated to a VM
If additional virtual machines may possibly migrate (either planned or
unplanned) to the server, then memory (per the sizing guidance above)
should be reserved for those virtual machines. Failure to do so may result in
virtual machines being unable to start on the server or degraded performance
for all virtual machines on the server.
For additional information, refer to the Performance Tuning Guidelines for
Windows Server 2008 document at http://www.microsoft.com.
Networking Considerations
Refer to the Dell Network Solutions Guide for Microsoft Hyper-V for
information on sizing the network requirements for a Hyper-V deployment. It
provides guidance on the number of network adapters required and
recommended for various configurations including Failover Clustering and
iSCSI storage.
Storage Considerations
Refer to the Dell Storage Solutions Guide for Microsoft Hyper-V for
recommendations on storage sizing for all virtual machine files including
VHDs and Passthrough disks. It also provides guidance on choosing the right
kind of virtual storage disk as well as the appropriate back-end storage
enclosure or storage arrays.
Components of a Hyper-V Solution
An actual Hyper-V deployment involves multiple servers, shared storage, and
networking components. Careful consideration is essential in ensuring that
the configuration provides the best performance for the virtual machine
workloads.