Systems Management

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

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 so 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