IBM z/OS Server User Manual


 
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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