Owner's manual

ODX Data Copy Model Ooads Server
Microso’s Live Migraon oers the ability to move a live
VM from one physical server to another. Included are some
interesng storage-oriented capabilies that provide added
value if you use SANs (especially Fibre Channel SANs). The
rst is the ODX Data Copy Model. On compable external
storage arrays, ODX provides the ability to move data
between LUNs without involving the server. For large data
movements, this results in a huge performance
improvement.
Improved Live Migraon with vFC
Hyper-V’s Virtual Fibre Channel (vFC) is a new capability
that augments Live Migraon for those end users with Fibre
Channel SANs. By creang virtual Fibre Channel Host Bus
Adapters navely within Hyper-V, Microso simplies
migraons by moving the adapter with the VM. This
eliminates the need to re-congure Fibre Channel Switches
aer a live migraon.
Microso Hyper-V’s powerful migraon
capabilies can provide even more ulity if likely
failover and evoluon paths in the private cloud
are planned into the framework. This is
especially true for migraons to resolve
hardware failures, which tend to be done under
considerable stress. Planning failover
migraons decreases the likelihood of negave
performance impacts that may ulmately have
to be undone later.
Live VM Migraon
Windows Ooaded Data Transfer (ODX) in Windows Server 2012 directly
transfers data within or between compable storage devices, bypassing
the host computer.
ODX
This diagram shows a Live Migraon ulizing vFC. The two-port virtual Host
Bus Adapter ping-pongs from the rst port to the second port, avoiding
trac disrupon during the live migraon.
Tradional Data Copy Model ODX Data Copy Model
1. A user copies or moves a le or this occurs as part of a
VM migraon.
2. Windows Server 2012 translates this transfer request
into an ODX and creates a token represenng the data.
3. The token is copied between the source server and
desnaon server.
4. The token is delivered to the storage array.
5. The storage array internally performs the copy or move
and provides status informaon to the user.