So if you do not need the full power of Exalytics, but are interested in the integrated solution it represents, it has now become cheaper to start up and ramp up resources when needed.
The installation of Oracle VM is described in the official documentation, under "2 Configuring Exalytics Machines for Virtualization":
http://docs.oracle.com/cd/E27027_01/bi.1/e24706/install_virtual.htm#CIHBHIGH
The Oracle VM template and base image can be downloaded from the Oracle Software Delivery Cloud (that's eDelivery to us older people):
http://edelivery.oracle.com
After signing in, search for:
Product Pack: Oracle Business Intelligence
Platform: Linux x86-64
Click on “Oracle Exalytics Software Media Pack for Linux x86-64”
Then download the files:
Oracle Exalytics Base Image 2.0.1.1.0 for Exalytics Oracle VM x86-64 (Part# V34491-01)
Oracle Exalytics Oracle VM Template 2.0.1.1.0 for Exalytics Oracle VM x86-64 (Part# V34468-01)
As I do not have hands-on access to an Exalytics machine at the moment, I kind of have to stop here - but I am sure our friends at Rittman Mead will start playing with this soon. ;-)
Two important things to notice, if you are using Oracle VM for Trusted Partition Licensing (that is Oracle-speak for limiting the number of CPUs being used on the Exalytics machine):
1. Oracle VM requires that you install Oracle VM Manager, and this is NOT supported on Exalytics, so you will need to install this on another server
2. Trusted Partition Licensing requires that you monitor the usage of resources by installing Oracle Enterprise Manager Cloud Control 12c Release 2 on another server, when it is available (not yet GA at the time of writing this)
More info in this document (Overview of licensing policies for partitioned environments):
http://www.oracle.com/us/corporate/pricing/partitioning-070609.pdf
Happy VM'ing!