IBM z/OS manual VM Version 4

Additional enhancements in z/VM V3 include:

•Native FlashCopy for Enterprise Storage Server (ESS) for high-speed data copy

•Guest support enhancements for 3494 VTS and FICON attached 3590 A60 Tape Controller

Connectivity enhancements for TCP/IP Feature for z/VM:

•Improved security with the inclusion of a Secure Socket Layer (SSL) server

•Transparent data access to remote systems data with an NFS Client

•Capability and usability improvements to FTP server for Web browsers

•Reduced load on hosts with support for IP Multicasting

•Improved data transfer performance with QDIO support- ing Gigabit Ethernet, Fast Ethernet, and 155 ATM (Ether- net LAN Emulation)

•Support for the DFSMS/MVS® Program Management binder and loader functionality to enhance application affi nity between CMS and OS/390 or z/OS

z/VM Version 4 (V4)

With z/VM and the IBM Integrated Facility for Linux (IFL), a low-cost, fl exible environment is created to test and develop on Linux while running Linux production applications on IBM z990, z890, z900, z800, S/390 Parallel Enterprise Server Generation 5 and 6, S/390 Multiprise 3000, or equivalent servers. Support for IFL processor features by z/VM V4 or later is designed to run Linux workloads with- out increasing the IBM software charges for z/OS, z/OS.e, OS/390, VM, VSE/ESA, or TPF operating systems and applications running on standard engines of the z990, z890, z900, z800, and S/390 servers in other logical partitions.

Engine-based pricing for z/VM V4 and its optional features allows customers the opportunity to exploit the zSeries and S/390 servers more cost effectively than a discrete server implementation. With engine-based pricing, cus- tomers pay a one-time software license charge (OTC) for each processor engine. This can be for standard proces- sor engines or IFL engines. Traditional operating systems such as z/OS, z/OS.e, OS/390, TPF, VSE/ESA, z/VM V3.1, or VM/ESA are not supported nor can they operate on IFL engines. Only Linux workloads in an LPAR or Linux guests of z/VM V4 or later can operate on the IFL engines.

z/VM provides the capability to account for the use of system resources by virtual machines, including those run- ning Linux. Accounting records are produced that track a virtual machine’s use of processor, paging, I/O, and virtual network resources, including virtual channel-to-channel adapters (CTCAs), inter-user communication vehicle (IUCV) or advanced program-to-program (APPC) connections, and virtual (guest LAN) network interface cards (NICs).

z/VM V4.4 extends its virtualization technology in support of Linux and other guests while providing some enhancements that enable z/VM to be self-optimized and self-managed:

•Reducing contention for the z/VM Control Program (CP) scheduler lock may help increase the number of Linux and other guest virtual machines that can be managed concurrently.

•Enhancing the Virtual Machine Resource Manager (VMRM) to provide the infrastructure necessary to sup- port more extensive workload and systems resource management features by providing:

– monitor data showing actual workload achievement

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