IBM z/OS - Manual (Page 80)

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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