Engine-based Value Unit Pricing

z/VM V5 introduced engine-based Value Unit Pricing which replaces the per-engine pricing model that is available with z/VM V4 as well as providing a lower entry price. Engine-based Value Unit pricing is designed to provide a decreasing price curve which may help provide improved price/performance as hardware capacities and work- load grow. Value Unit pricing for z/VM V5 can provide for a lower price per processor engine as more processor engines are licensed with z/VM V5.1 across the enterprise.

Value Unit Pricing helps you to:

•Add capacity and workload with an incremental and improved price

•Manage software costs better

•Aggregate licenses acquired across machines that are part of your enterprise

Engine-base Value Unit Pricing of z/VM V5 should not be tied to, or associated with, MSU-based Value Unit Pricing.

Enhancements in z/VM V5.1 include:

Virtualization Technology and Linux Enablement

•Support for SCSI FCP disks enable the deployment of a Linux server farm on z/VM using only SCSI disks. SCSI disks can be used as such by guests through dedicated FCP subchannels, and are also supported as emulated 9336 Fixed-Block Architecture (FBA) devices for use by guests, CMS, and CP. With this support, you can install, IPL, and operate z/VM from SCSI disks. The z/VM SCSI support for system disks is based on emulation of the IBM FB-512 disk architecture and this emulation is also available for guest use. VM supports an individual emu- lated FBA disk up to 381 GB in size. However, directory, paging, and spooling allocations must reside within the ﬁ rst 64 GB of a CP-formatted volume. Other kinds of CP allocations may be deﬁ ned beyond the ﬁ rst 64 GB.

•z/VM V5.1 includes the capability to install z/VM both from a DVD to an ESS SCSI disk emulated as a FBA device and a 3390 DASD. Installing from a DVD can signiﬁ cantly reduce the required installation media and allows you to install to a zSeries server using only SCSI disks. This is expected to be most beneﬁ cial in a z/VM environment with Linux guests and without traditional installation devices such as IBM TotalStorage tape drives attached to the IBM zSeries server.

•Coordinated near-continuous availability and disaster recovery for Linux guests by providing a new HyperSwap function so that the virtual devices associated with one real disk can be swapped transparently to another. HyperSwap can be used to switch to secondary disk storage subsystems mirrored by Peer-to-Peer Remote Copy (PPRC). HyperSwap is exploited by GDPS 3.1 to provide a coordinated near-continuous availability and disaster recovery solution for distributed applications, such as WebSphere, that span z/OS images running natively and Linux guests running under z/VM.

•PCIX Cryptographic Coprocessor (PCIXCC) sup- port provides z/OS and Linux guest support for the PCIXCC Feature available with the z990 and z890 severs. Delivery of the z/VM PCIXCC support satisﬁ es the Statement of Direction made on May 13, 2003. z/VM V5.1 supports the third-generation cryptographic feature, Crypto Express2, which replaces the PCICA and PCIXCC features. Crypto Express2 combines the functions of both PCICA and PCIXCC in one feature providing improved secure-key operations. Coincident with the availability of this new cryptographic hardware feature, z/VM V5.1 pro- vides support for Crypto Express2 clear-key cryptographic functions for Linux for zSeries guests and clear-key and secure-key cryptographic functions for z/OS guests.

•The Systems Management APIs, introduced in z/VM V4.4, provided a basic set of functions that may be called by applications to allocate and manage resources for guests running in z/VM virtual machines