HP Integrity Virtual Machines
|Stable release||6.1 / March 2012|
|Preview release||6.1 / March 2012|
|Written in||C and Itanium Assembly language|
|Operating system||HP-UX, Linux, Windows, OpenVMS|
|Platform||HP Integrity and other Itanium platforms supporting HP-UX|
|Type||Virtual machine monitor|
|Website||HP Official Web Site for Integrity VM|
Integrity Virtual Machines is software from Hewlett-Packard that allows multiple virtual machines to run concurrently on any Itanium server running HP-UX, notably the HP Integrity line. It is part of HP's Virtual Server Environment suite.
The product is optimized for server use.
Christophe de Dinechin initiated a skunkworks project to virtualize Itanium, with the help of Jean-Marc Chevrot and of a "virtual team" of experienced HP engineers. A prototype of Integrity Virtual Machines was then developed between 2000 and 2003 by Christophe de Dinechin, Todd Kjos and Jonathan Ross. It was then turned into a full-fledged product by a larger team of experienced OpenVMS, Tru64 Unix and HP-UX kernel engineers.
- Version 1.0 and 1.2, released in 2005, ran HP-UX in virtual machines.
- Version 2.0, released in November 2006, additionally supports Windows Server 2003, CD and DVD burners, tape drives and VLAN.
- Version 3.0, released in June 2007, supports Linux Red Hat Enterprise Linux
- Version 3.5, released in late 2007, supports SUSE Linux Enterprise Server, HP-UX 11i v3 guests, new service packs for Windows and Linux guests, and accelerated virtual I/O for HP-UX guests, enabling better I/O performance and a larger number of devices.
- Version 4.0, released in September 2008, runs on HP-UX 11.31 (also known as 11i v3), supports 8 virtual CPUs, capped CPU allocation (in addition to CPU entitlement as in previous releases), additional support for accelerated virtual I/O (AVIO), and a new VM performance analysis tool. Version 4.0 also includes beta functionality such as on-line migration and support for OpenVMS guests.
- Version 4.1, released in April 2009, supports Online VM Migration which allows customers to migrate active guests from one VM Host to another VM Host without service interruption. It also provides support for SSH third-party alternatives for secure communications, accelerated virtual I/O (AVIO) for networking on Windows and Linux guests, support for ignite and VxVM backing stores.
- Version 4.2, released March 2010, supports encryption during a VM migration, brings support for newer Itanium hardware and VM Guest OS versions, contains software allowing for VMs as Serviceguard packages and Serviceguard Nodes, and support for automatic memory reallocation.
- Version 4.2.5, released September 2010, brings support for the HP Integrity Superdome 2, as well as suspend and resume support for a VM.
- Version 4.3, released March 2011, brings support for the Intel® Itanium® Tukwila processor, an NVRAM Edit utility, a Virtual iLO Remote Console, 16 virtual CPUs for guests, 128GB for guest memory, 256 AVIO storage devices, the support for Fiber Channel over Ethernet, and the support of NFS backing stores. .
- Version 6.1, released March 2012 brings support for management of Hp vPar, Direct Input Output (DIO) feature for improved I/O functionality, manageability and performance .
Exact specifications depend on the precise version and system configuration.
- The host configurations are the same as those supported by HP-UX, and can include 128 physical cores and 1TB of main memory.
- More than 250 guests can run concurrently, although the optimal number is generally lower, depending on host memory and processor configuration.
- Guests can have multiple virtual CPUs, the maximum number in supported configurations being 4 with releases before 4.0, then 8 with release 4.0, and 16 with release 4.3.
- Guests can be configured with up to 128G of memory with version 4.3. In recent releases, memory can be adjusted dynamically for HP-UX guests.
- Virtual devices can be added or removed dynamically. The number of virtual devices allowed in supported configurations depends on the release. Versions after 4.3 support up to 256 when accelerated virtual I/Os are used.
- The CPU allocation for virtual machines can be adjusted dynamically with a granularity of 1% or 1 MHz. CPU time is allocated by a fair-share scheduler, which delivers better CPU utilization for SMP guests than a more simplistic gang scheduler.
User interface 
Essential commands include:
hpvmcreateto create virtual machines
hpvmstatusto display status information
hpvmstopto start and stop virtual machines
hpvmmodifyto modify existing virtual machines
hpvmconsoleto simulate a hardware console
hpvmmigrateto perform on-line or off-line guest migration
hpvmsarto show performance information about the running guests.
hpvmresumeto suspend and resume virtual machines
The user interface is integrated in the HP Integrity Virtual Machines Manager.
See also 
- Presentations—Gelato ICE | San Jose | April 2007 :: About :: Gelato ICE
- redhat.com | Application Profile Display
- HPVM 3.5
- New Features and Enhancements in This Version of Integrity VM
- "HP Integrity Virtual Machines 4.2: Release Notes". June, 2010. Retrieved October 6, 2010.
- "HP Integrity Virtual Machines 4.2.5: Release Notes". October, 2010. Retrieved October 6, 2010.
- "HP Integrity Virtual Machines 4.3: Release Notes". Autust, 2011. Retrieved August 19, 2011.
- "HP Integrity Virtual Machines 6.1: Release Notes". March, 2012. Retrieved March , 2012.
- HP Integrity Virtual Machines Manager