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as z/OS, z/OS.e, OS/390, TPF, VSE/ESA, CMS, and Linux
on zSeries and S/390. The ability to support multiple
machine images and architectures enables z/VM to run
multiple production and test versions of zSeries and S/390
operating systems, all on the same system. z/VM can help
simplify migration from one release to another, facilitate
the transition to newer applications, provide a test system
whenever one is needed, and consolidate several systems
onto one physical machine. z/VM can also be used to pro-
vide virtual access to the latest DASD and processor archi-
tecture for systems that lack such support.
New technological enhancements in z/VM V4.4 provide
:
• Exploitation of the zSeries 890 and 990 server
– extending Dynamic-I/O confi guration support allows
channel paths, control units, and devices to be
dynamically added, changed, and deleted in a Logi-
cal Channel SubSystem (LCSS) environment
– support for extended I/O-measurement facilities
provides improved capacity planning and I/O perfor-
mance measurement
– handling I/O-confi guration defi nition and dynamic-I/O
confi guration in an environment of up to 30 LPARs, an
increase from the previous limit of 15
• Support for the zSeries capability to cascade two FICON
directors within a Fibre-Channel fabric. z/VM and its
guests can take advantage of this enhanced and simpli-
fi ed connectivity, which is particularly useful in disaster-
recovery and business continuity situations.
• Support for the IBM TotalStorage Enterprise Storage
Server (ESS) FlashCopy V2 providing increased fl exibil-
ity for improved capacity management and utilization.
• Support for the IBM ESS Peer-to-Peer Remote Copy
Extended Distance (PPRC-XD) function, extending the
distance well beyond the 103 km supported with PPRC
synchronous mode. PPRC-XD is suitable for data migra-
tion, backup, and disaster recovery procedures. PPRC
Version 2 (V2) is also supported for guest operating
systems, offering an asynchronous cascading solution
providing a complete, consistent, and coherent copy of
data at a remote site.
• Support for IBM TotalStorage Enterprise Tape Controller
3592 Model J70 and Tape Drive 3592 Model J1A, this
including support of Write Once Read Many (WORM)
data cartridges.
Systems Management
Improvements in systems management some of which
help to provide self-confi guring, self-managing, and self-
optimization facilities in z/VM V4.4 include:
• Functions that may be called by client applications to
allocate and manage resources for guests running i
n
z/VM virtual machines (virtual images). Use of the appli-
ca
tion programming interfaces (APIs) through an appli-
cation provided by a customer or solution provider are
designed so that such applications can allow administra-
tors who lack in-depth VM knowledge to manage a large
number of virtual images, running in a single z/VM system.
• Hardware Confi guration Manager (HCM) and Hardware
Confi guration Defi nition (HCD) components to create
and manage your I/O confi guration. This new support
provides a comprehensive, easy-to-use I/O-confi gura-
tion-management environment similar to that available
with the z/OS operating system.
• Performance Toolkit for VM that provides enhanced
capabilities for a z/VM systems programmer, operator, or
performance analyst to monitor and report performance
data. The toolkit is an optional, per-engine-priced feature
derived from the FCON/ESA program (5788-LGA), pro-
viding:
– full-screen mode system console operation and man-
agement of multiple z/VM systems
– post-processing of Performance Toolkit for VM history
fi les and of VM monitor data captured by the MON-
WRITE utility