Hardware virtualization
Virtual Data-center
Benefits

Testing

Os development (lab environment)

Segregation of resources

Separation from host

Compatibility to any operating system

Remote Physical Access
Valuable Resources

Electricity

Real-estate

Equipment

Networking equipment

Servers

PDU's

Wiring
Virtual Hardware
Clustering Virtual Resources
Live migration
SAN migration
Network Migration
Cloning vs. templates
Deployment (Rapid)
Metered billing
Low down time
Easy upgrades (web)
Thin provisioning and
over subscribing
Any guest system for
customer
Cloud Computing
Network capability
Network storage (iSCSI)
Fail-over
Redundant path (MPIO)
Management
Quorum
Node Majority





No witness disk or
quorum required
50% of nodes must
be operational
Recommended for
odd number of nodes
No shared storage
required
Node and Disk Majority



Disk is included in
majority vote
Can loose half of the
nodes as long as
quorum is online
Can loose the quorum
connection if over half
of the nodes are
online
Node and File Share Majority



Share is included in
majority vote
Can loose half of the
nodes as long as file
share is online
Can loose the file
share connection if
over half of the nodes
are online
No Majority



Quorum disk must
remain online
Hosts can fail as long
as quorum remains
online
If quorum fails and all
hosts are online, the
cluster fails
Fall-backs
Storage space
Management
Over subscribing
Expensive equipment
Unexpected maintenance and failure
Virtualization platforms
VMware workbench
ESXI
Hyper-v
XenServer
VMWare
Pros
Completely Free*
No hardware-based virtualization
required (Virtualizes a VM)
Best Live Migration (i.e., moving
running VMs from one host to
another) (VMotion cost!)
Quick setup
Less host system requirements
(busyBox)

Cons
ESXi includes drivers so is large
and reduces support
Has been exploited
Difficult management
Best Live Migration (i.e., moving
running VMs from one host to
another) (VMotion cost!)
ESX Server 3.5 is limited to 128
active VMs
Hyper-V

Pros
Hyper-v has small micro-kernel
that reduces attack surface and
size.
Better quorum migrations
No additional cost Free**
Windows Server 2008 is licensed on a per -processor b asis: When reviewing the table below, please bear in
mind that a license for each processor is needed. While there is no technical limitation on the num ber of guests
you can run o n the Standard, Enterprise , or Datacenter editions , the num ber of licenses required as part of the
host license vary by edition. The following table indicates the num ber of guests included
for free in the license
of the host. If additional guests over the allowed limit are run on any edition, then
additional licenses are
required .
Furtherm ore, the Active Directory ® service is included with certain editions of Windows Server 2008. This
affects the li censing in specific hosting scenario s. The use of Active Directory for the Windows Server host and
guest O S is allowed only with the Standard and Enterprise editions. Since
the Datacenter edition is licensed
only for anonym ous use, Active Directory cannot be used with this edition .
The table below provides only a general licensing overview of Windows Server 2008. Depending on the
scenario and which edition of Windows Server 2008 is installed on the host, num erous licensing scenarios
exist . These are described in the following sections.
The licensing for Server Management Suite Enterprise (SMSE) is based on number of physical servers managed
by SMSE. In Figure 5, you have to pay for 3 machines – regardless of the number of guests that are running on
each host – or – the number of servers on which you installed System Center Components.
Here is a numerical example: Assume a Hyper -V cluster with 4 Physical Serv ers; and each server can have up to
8 Virtual Machines for a total of 32 guest VMs (8x4). In order to manage this cluster, you insta ll Server
Management Suite Enterprise on two to four servers; with one server dedicated (or shared between) Virtual
Machine Manager, Operations Manager, Data Protection Manager and Configuration Manager.
Using the sample
pricing in Figure 6 above, t he licensing cost to manage all 4 Physical Servers (hosts) and 32 Virtual Machines
with these two SMSE servers will be 4 x €39.54 = €159.16 /month. The configuration described in this example is
similar to Error! Reference source not found. . Please note that with SMSE, the Client Access Licenses for
agents that run on individual hosts or guest VMs are included in the price.
Hyper-V


Only hardware-based virtualization (e.g., Intel-VT or AMD-V),
and virtualization must be enabled in the BIOS.
Live Migrations can fail catastrophically

May result in cloned VM's, missing VM's, Corrupt VM's

Increased overhead cost for hardware

Long setup and a lot of management infrastructure

MSSQL, SCVMM, SCCM, SCOM, DPM, DC01, DC02, WSUS
Hyper-v

Each Host requires:

fail-over clustering

iSCSI HIT

File services


Hyper-v
Group policy
management

BITS

MPIO
Hyper-v tools
fail-over clustering tools
Storage manager for SANs
Windows backup tools
Command line tools
Remote server
administration tools
(distributed file system
tools)
Network Support
Networking and layout
Storage
MPIO
Management network