IBM z/OS - Manual (Page 82)

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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
to provide virtual access to the latest DASD and processor
architecture for systems that lack such support. New tech-
nological enhancements in z/VM 4.4 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
Systems Management
Improvements in systems management, some of which
help to provide self-confi guring, self-managing, and self-
optimizing facilities in z/VM V4.4 include:
• Functions that may be called by client applications to
allocate and manage resources for guests running in z/VM
virtual machines (virtual images). Use of the application
programming interfaces (APIs) through an application
provided by a customer or solution provider are designed
s o that such applications can allow administrators 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