Systems Management

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.

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 in z/VM virtual machines (virtual images). Use of the appli- cation 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