IBM z/OS - page 82

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

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