IBM z/OS V2.5 4Q 2021 enhancements

IBM United States Software Announcement 221-388
November 23, 2021

Table of contents
OverviewOverviewTechnical informationTechnical information
Key requirementsKey requirementsOrdering informationOrdering information
Planned availability datePlanned availability dateTerms and conditionsTerms and conditions
DescriptionDescriptionOrder nowOrder now
Statement of directionStatement of directionRegional availabilityRegional availability
Program numberProgram number


(Corrected on November 24, 2021)

Text was revised under the "ICSF enhnacments" heading in the Description section.



Overview

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IBM® z/OS® is designed to keep applications and data available, systems highly secure, server utilization high, and to enable agile development. z/OS continuous delivery (CD) offers clients the opportunity to use new z/OS functions, capabilities, and technologies by applying service rather than upgrading to a new z/OS release.

This quarter’s CD update further extends the capabilities of z/OS V2.5 with key features that include the following:

  • IBM z/OS Management Services Catalog (zMSC). This new IBM z/OS Management Facility (z/OSMF) task is designed to modernize how z/OS system programmers manage their z/OS environments by leveraging z/OSMF workflows and services to spend less time on routine tasks.
  • Cross-system Coupling Facility (XCF) notepad resiliency enhancements. Multiple resiliency enhancements are provided to improve the availability of applications making use of XCF notepads.
  • Coupling Facility Resource Management (CFRM) support for 4096 CF structures in a sysplex. The maximum number of CF structures that can be defined and used concurrently within a sysplex environment has been increased from 2048 to 4096.
  • z/OSMF enhancements. z/OSMF has been enhanced with key productivity functions, including new capabilities to perform more data set and UNIX® system services (USS) file operations directly on the z/OSMF desktop, as well as multiple REST API updates.
  • IBM z/OS Container Extensions (zCX) enhancements. In addition to several zCX usability, Linux® kernel, and Docker enhancements, zCX large user identifier (UID) and group identifier (GID) range support has been added to enable a zCX server to fully integrate with enterprise-wide Lightweight Directory Access Protocol (LDAP) infrastructure to support identity and access management (IAM) compliance.
  • Integrated Cryptographic Service Facility (ICSF) enhancements. ICSF updates include a range of cryptographic service enhancements such as new callable services and new key types and usages that support encryption.
  • IBM z/OS Workload Interaction Correlator updates. A new entitlement structure is implemented for z/OS Workload Interaction Correlator.
  • Enhanced support for Network File System (NFS). New capabilities include added macOS support as an NFS client for the z/OS NFS server and support for building the z/OS NFS client utilities with RPM Package Manager. RPM, originally Red Hat® Package Manager, now a recursive acronym, is a free and open-source package management system.
  • Partitioned data set extended (PDSE) zEnterprise® Data Compression (zEDC) support. Enhancements add support for allocating compressed format PDSEs, without any application changes.
  • IEBCOPY support for PDSE member generations. Provides the copy of PDSE member generations in IEBCOPY.
  • DFSMS archived key support. A new function has been added for decrypt-only archived encryption keys for VSAM and non-VSAM encrypted data sets.
  • Faster Db2® active log writes with Media Manager parallel write support using zHyperLink. Performance improvements include support for Media Manager dual logging and Db2 exploitation when writing dual-copy active logs in a zHyperLink environment.
  • Transparent Cloud Tiering (TCT) multicloud support. z/OS DFSMS has been enhanced to support multiple cloud definitions in a DS8000® TCT configuration.
  • DFSMShsm EXPIREBV support for UNIX files and directories. Provides EXPIREBV support to target specific UNIX files and directories with new UNIXPATH and RECURSE keywords.
  • DFSMShsm support for read-only file systems during incremental backup. This new function optimizes DFSMShsm UNIX file incremental backup processing when a UNIX file exists in a zFS mounted as read-only.
  • DFSMShsm UNIX file incremental backup enhancement. DFSMShsm has been enhanced with a new Java™ program that offloads the work of searching a UNIX directory sub-tree for files that have changed since the last backup to enable the hierarchical storage management host to be more efficient.
  • TS7700 Control-Unit Initiated Reconfiguration (CUIR) enhancement. CUIR is enhanced to enable devices in an unhealthy cluster to be automatically varied offline and online.



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Key requirements

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z/OS V2.5 operates on the following IBM Z® servers:

  • IBM z15™ Models T01 and T02
  • IBM z14® Models M01-M05
  • IBM z14 Model ZR1
  • IBM z13®
  • IBM z13s®

If you run z/OS V2.5 as a guest of IBM z/VM®, z/VM must be at a supported level.

For a complete description of z/OS V2.5 hardware requirements, see z/OS V2.5 Planning for Installation (GA32-0890), in IBM Documentation on December 31, 2021.



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Planned availability date

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December 31, 2021

Availability within a country is subject to local legal requirements.



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Description

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IBM z/OS Management Services Catalog

IBM extends the z/OSMF framework with z/OS Management Services Catalog. Experienced z/OS system programmers can create a catalog of customized services, each written with unique institutional knowledge, protocols, and processes. Services provide a presentation layer on top of z/OSMF workflows, intended to enable less experienced system programmers to complete z/OS management tasks faster and with fewer errors. Spending less time on routine tasks should provide more time for investments in strategic IT functions to increase value to your enterprise.

IBM provides a set of sample services designed to help system programmers get started creating and running services and demonstrate best practices. z/OS Management Services Catalog is designed to offer the following capabilities:

  • Powerful graphical interface for creating new services, editing existing and sample services, and running services on z/OS
  • Capability to view all services performed by a team, which can be used for audits
  • Sample services that provide step-by-step guidance for completing z/OS management tasks
  • Customization is provided for:
    • Individual control of in-application notifications
    • Administrator control of target systems on which to run services, default JOB statements, and the record of each time a service runs

To prepare for z/OS Management Services Catalog, IBM encourages system programmers to start creating their own workflow assets to use with services in the future. To learn more about z/OS Management Services Catalog, including instructions on how to get started, see the z/OS Management Services Catalog content solution web page.

XCF notepad resiliency enhancements

Multiple resiliency and continuous availability enhancements are provided for the XCF notepad service (IXCNOTE programming interface) to improve the availability of applications making use of XCF notepads, including the following:

  • Global notepad failure notification:
    • Provides functionality to enable XCF notepad exploiters to request that XCF automatically initiate notepad delete processing when XCF detects that all systems with active connectors to the notepad have lost connectivity to the CF that contains the structure hosting the notepad. This provides a global trigger point to fence off use of the current instance of the notepad when connectivity to the CF is lost, and expediently fail over to a new instance of the notepad allocated in another CF.
  • Dynamic notepad size change:
    • Provides functionality to enable an application to dynamically and nondisruptively increase or decrease the number of notes in a notepad in response to increased (or decreased) demand on notepad capacity, without disruptions in application availability. Prior to this enhancement, the deletion and recreation of a notepad definition (and a corresponding disruption in application access to the notepad) was required to change the maximum number of notes allowed in a notepad.

With the PTFs for APAR OA60571, these enhancements are available for z/OS V2.3 and later.

CFRM support for 4096 CF structures in a Parallel Sysplex®

The maximum number of CF structures that can be defined and used concurrently within a sysplex environment has been increased from 2048 to 4096. This support provides increased CF structure capacity for Parallel Sysplex environments that might be approaching the current limit of 2048 CF structures, and enables the definition and use of more instances of sysplex functions that each require their own unique CF structures, such as sysplex data-sharing groups. To exploit this new capability, clients must first format a CFRM couple data set that is capable of accommodating the desired number of CF structures, up to 4096, bring that larger CFRM couple data set into use in their sysplex, then use the CFRM administrative data utility or, if available, the z/OSMF CFRM Policy Editor, to define policy definitions for the additional CF structures that are to be used. CFRM support for up to 4096 CF structures is available on z/OS V2.5 and with the PTFs for APAR OA60356 on z/OS V2.3 and V2.4.

z/OSMF enhancements

z/OSMF is enhanced with key productivity functions, including the following:

  • Capability to perform more data set and USS file operations directly from the z/OSMF desktop. This includes new functions to copy, rename, and update the attributes of a file or data set. For example, changing the permissions of a UNIX file can now be performed directly from the desktop UI. With the PTFs for APAR PH39637, these enhancements are available for z/OS V2.4 and later.
  • z/OSMF has a rich set of programming APIs called REST services. These services are provided such that any authenticated and authorized user can drive the APIs to accomplish a task. For example, they can be driven by a z/OSMF workflow step, CURL script, or from an Ansible® module. The latest updates include:
    • Sysplex CFRM policy data so that sysplex configuration and management can be performed through a program. Functions like copying, renaming, and deleting policies, and changing the CFRM policy and activating it, are some of the available functions that are available with the PTFs for APAR PH39685 for z/OS V2.4 and later.
    • Data set and file operation improvements include the capability to specify an account number on a request as well as handling additional special international characters in a data set or file name. With the PTFs for APAR PH39690, these enhancements are available for z/OS V2.4 and later.
    • Storage management information, new in this deliverable with the PTFs for APAR PH40099 for z/OS V2.4 and later, provides the capability to retrieve a data class or storage class.

zCX enhancements

z/OS Container Extensions enhancements to improve the capability to run Linux on IBM Z software in z/OS include the following:

  • With the PTF for APAR OA61912 on z/OS V2.4 and later:
    • zCX large UID and GID range support. Support is added to zCX to provide large UID and GID range and high numbers. This is designed to enable a zCX server to fully integrate with an enterprise-wide LDAP infrastructure. Higher UID and GID numbers and large range are important prerequisites in some client configurations to be IAM compliant.
    • zCX Linux kernel update. zCX Linux kernel is updated to use 5.4.0-81-generic. This updates the zCX with software package versions, security fixes, and patches, and overall Linux kernel under-the-hood improvements.
    • zCX Docker update. This updates Docker and container runtime package versions, and can improve overall stability, security, and performance.
  • The following capability is available on z/OS V2.5 and with the PTF for APAR OA61189 on z/OS V2.4:
    • zCX support to back out disk allocation failures. zCX z/OSMF add_data_disks workflow has been enhanced. It is designed to provide the capability to back out changes when a disk allocation failure occurs when adding a new user or swap data disk to an existing zCX instance.

ICSF enhancements

With the PTFs for APAR OA61253 for z/OS V2.2 and later, ICSF is updated to provide the following enhancements:

  • A new callable service Encrypted PIN® Verify 2 (CSNBPVR2) that can be used to compare two ISO-4 PIN blocks
  • New "One Way Function" options added to Symmetric Algorithm Encipher (CSNBSAE) and Diversified Key Generate (CSNBDKG) callable services in support of Australian Payment Networks (APN) standards
  • The capability to have the Random Number Generate Long (CSNBRNGL) callable service return data encrypted with a provided cipher key
  • New EC-SDSA signatures for elliptic curves secp256r1 and secp521r1
  • The capability to export ECC, RSA, and AES key tokens in "Azure object format" for use in cloud services
  • A new PKCS#11 Secret Key Reencrypt (CSFPSKR) callable service to enable ciphertext to be encrypted under a new encryption key within the boundary of the hardware security module
  • New key-usage keywords to the Key Generator Utility Program (KGUP) for AES CIPHER keys
  • A new C header file for mapping SMF Type 82 records

New entitlement structure for IBM z/OS Workload Interaction Correlator

z/OS Workload Interaction Correlator enables z/OS components and middleware to generate cost-effective summary data enriched with exceptionalism every 5 seconds. z/OS Workload Interaction Correlator data is First Failure Data Capture (FFDC) for transient performance problems. When z/OS Workload Interaction Correlator data is used with an analytics product like the IBM z/OS Workload Interaction Navigator, a Subject Matter Expert can reduce the time required to diagnose a problem root cause.

IBM implements the following new z/OS Workload Interaction Correlator entitlement structure:

  • For z/OS V2.4 clients, there are two ways to get the z/OS Workload Interaction Correlator:
    • It is entitled at no additional charge when RMF is licensed
    • License the z/OS Workload Interaction Correlator, if RMF is currently not licensed
  • For z/OS V2.5 clients, there are three ways to get the z/OS Workload Interaction Correlator:
    • It is entitled at no additional charge when RMF is licensed
    • It is entitled at no additional charge when ADG is licensed
      • Note: ADG it is entitled at no additional charge when RMF is licensed
    • License z/OS Workload Interaction Correlator, if RMF or ADG is currently not licensed

Any client who has not purchased RMF or ADG can still purchase the z/OS Workload Interaction Correlator independently as a z/OS priced feature, just as they could prior to this new entitlement structure.

Enhanced support for NFS

The z/OS NFS server supports the Apple macOS as an NFS client using the NFS V4 protocol and can operate with or without Kerberos authentication. This client/server combination is supported on z/OS V2.5 with the PTF for APAR OA61716. This support now enables users to share z/OS data found in MVS data sets and z/OS UNIX files with Macintosh computers using the NFS protocol.

Users of the z/OS NFS server can now build RPM packages on RHEL, SLES, or AIX® for the z/OS NFS client utilities of mvslogin, mvslogout, and showattr. RPM packages enable a more convenient way for users to distribute the z/OS NFS client utilities across servers. This enhancement is available on z/OS V2.5 and with the PTFs for APAR OA61128 on z/OS V2.4.

PDSE zEDC support

z/OS, together with the priced z/OS zEDC feature, offers high-performance, CPU-efficient, and low-latency compression, designed to improve disk utilization and support data-intensive applications with ease. Enhancements to PDSE enable the capability to create SMS-managed compressed format PDSE V2 data sets, enabling PDSE members to be compressed utilizing zEDC without any application changes. Combining PDSE compression with encryption potentially provides additional CPU reduction and performance benefits. Support for PDSE compression is provided on z/OS V2.5 and with the PTFs for APAR OA61168 on z/OS V2.3 and V2.4.

IEBCOPY support for PDSE member generations

Similar to generations for data sets, Version 2 PDSEs support multiple levels, or generations, of members for backup or archival purposes. IEBCOPY, a commonly used utility, provides the capability to copy PDSE member generations to another PDSE using new COPYGROUP or COPYGRP keywords on z/OS V2.5 and with the PTF for APAR OA60639 on z/OS V2.3 and z/OS V2.4.

DFSMS archived key support

In z/OS V2.5, ICSF supports the capability to limit the use of archived keys to decryption operations. DFSMS access methods are enhanced to support the requested behavior for archived keys based on the user specification via the XFACILIT class resource, CSF.KDS.KEY.ARCHIVE.DATA.DECRYPT, which indicates that the use of archived data-encryption keys should be limited to data-decryption operations only. An attempt to open an encrypted VSAM or non-VSAM data set with a decrypt-only archived encryption key for anything other than input will fail. This enables encrypted data to be accessed but prevents creating new encrypted data with the archived key. This item is only available with z/OS V2.5.

Faster Db2 active log writes with Media Manager parallel write support using zHyperLink

zHyperLink is a low-latency short-distance connection between an IBM z14, or later, IBM Z system and IBM storage controllers that enables I/O to be performed synchronously. With the DFSMS Media Manager support for zHyperLink writes, Db2 12 for z/OS can improve log throughput by exploiting zHyperLink for active log writes. zHyperLink write processing can speed up commit by making the log write faster. This can improve transaction response time, reduce the latency for log writes, and significantly speed up commits of the transactions.

Media Manager was enhanced to provide support for parallel writes, called Media Manager Dual Logging, enabling simultaneous update writes to two data sets in one request via zHyperLink. Db2 exploits this enhancement to write to dual active logs, which is beneficial for most Db2 for z/OS configurations. Because Db2 now performs log writes to the two active logs in parallel using zHyperLink synchronous I/O, the lock and latch held times are reduced without requiring any application changes. Media Manager support for parallel writes is provided on z/OS V2.5 and with the PTFs for APARs OA57833, OA58134, and OA59581 on z/OS V2.3 and z/OS V2.4. The exploitation of Media Manager parallel writes on Db2 for z/OS is provided by the PTF for Db2 12 APAR PH29407.

TCT multicloud support

As previously announced in Hardware Announcement 121-042 121-042, dated July 27, 2021, TCT is enhanced to support multiple cloud definitions per DS8000, such as a combination of IBM Cloud® Object Storage and IBM TS7700 DS8000 Object Store, to expand the flexibility of TCT. Using defined SMS network cloud constructs and policies, TCT backup and archive workloads can be split to use different cloud targets. For example, you can keep confidential data onsite in a private cloud while other data can move to a public cloud, or more active backups or frequently recalled data can remain onsite in a TS7700 object store while unreferenced colder data is stored on public clouds. DFSMS has been enhanced to support multiple cloud definitions in TCT configurations with the PTFs for APARs OA60977 and OA61013 on z/OS V2.3 and later.

Enhanced DFSMShsm EXPIREBV support for UNIX files and directories

Enhanced DFSMShsm EXPIRE Backup Version (EXPIREBV) provides new UNIXPATH and RECURSE keywords to narrow the expiration examination to specific UNIX file backups or UNIX file directories and sub-trees. DFSMShsm support is provided on z/OS V2.5.

DFSMShsm support for read-only file systems during incremental backup

DFSMShsm is enhanced to recognize when a UNIX file is located in a file system that is mounted read-only and use the latest backup date from the hierarchical storage management inventory to decide whether a new backup needs to be taken. This avoids taking an unnecessary incremental backup of UNIX files in a read-only file system when they have not changed since the last backup. DFSMShsm support is provided on z/OS V2.5 and with the PTF for APAR OA61472 on z/OS V2.3 and z/OS V2.4.

DFSMShsm UNIX file incremental backup enhancement

During incremental backup processing, the DFSMShsm host spends a noticeable amount of time searching for changed UNIX files. With the PTF for APAR OA61080 on z/OS V2.3 and later, DFSMShsm is enhanced with a new Java program backup that offloads the work of searching a UNIX directory sub-tree for files that have changed since the last backup. The files and directories examined can be modified by exclude criteria, either on the command or in a file. Any files found to be in need of backup are sent to the hierarchical storage management host for backup processing. Offloading the search for changed UNIX files enables the hierarchical storage management host to more efficiently manage and complete the file backup.

TS7700 CUIR enhancement

As previously announced in Hardware Announcement 121-055, dated August 3, 2021, the TS7700 Virtualization Engine R5.2.1 CUIR support is enhanced to enable devices in an unhealthy cluster to be automatically varied offline and online. With the full function support, an automatic vary capability is provided for the TS7700 to notify a host that a distributed library is having issues. This enables each of the supporting host systems to automatically vary the device offline, and once the issue with that cluster has been resolved, the TS7700 can notify the host that the device should be brought online. z/OS support is provided with the PTFs for APARs OA60929 and OA61050 on z/OS V2.3 and later.

Section 508 of the US Rehabilitation Act

z/OS V2.5 is capable as of the planned availability date, when used in accordance with associated IBM documentation, of satisfying the applicable standards, including the Worldwide Consortium Web Content Accessibility Guidelines, European Standard EN 301 349, and US Section 508, provided that any assistive technology used with the product properly interoperates with it. An Accessibility Conformance Statement can be requested on the Product accessibility information website.



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Statement of direction

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In the z/OS V2.5 Software Announcement 221-260, dated July 27, 2021, IBM announced the intention to add a data set merge capability within the deployment operation of z/OSMF Software Management to simplify data set and UNIX file system management. This merge capability is required by some clients to install z/OS using z/OSMF. The z/OSMF Software Management data set merge function is now planned to be available April 2022 with the PTFs for APAR PH42028.

In the z/OS V2.5 Software Preview Announcement 221-057, dated March 2, 2021, IBM announced the planned withdrawal date of January 2022 for the CustomPac Dialog ServerPac. IBM intends to extend this withdrawal date to enable clients to continue to have data set merge capability for z/OS V2.5 CustomPac Dialog.

IBM intends to keep the CustomPac Dialog ServerPac as an installation option until the z/OSMF Software Management data set merge function is available and the z/OSMF ServerPac has enabled it. The availability of the z/OSMF ServerPac enablement of data set merge and the planned withdrawal of the CustomPac Dialog ServerPac installation method are intended to be announced in second quarter 2022.

IBM strongly recommends that clients continue to use the z/OSMF ServerPac installation method, unless the data set merge function during the deployment operation is necessary. For those that wish to use data set merge function in z/OSMF ServerPac, clients must wait to order z/OS V2.5 until data set merge has been enabled. In the meantime, clients can continue to use CustomPac Dialog ServerPac.

For more information about how to install ServerPac with z/OSMF Software Management, see the ServerPac Installation using z/OSMF content solution web page.

Statements by IBM regarding its plans, directions, and intent are subject to change or withdrawal without notice at the sole discretion of IBM. Information regarding potential future products is intended to outline general product direction and should not be relied on in making a purchasing decision. The information mentioned regarding potential future products is not a commitment, promise, or legal obligation to deliver any material, code, or functionality. Information about potential future products may not be incorporated into any contract. The development, release, and timing of any future features or functionality described for IBM products remain at the sole discretion of IBM.



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Reference information

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For information about z/OS V2.5, see:

  • Software Announcement 221-260, dated July 27, 2021
  • Software Announcement 221-057, dated March 2, 2021

For information about IBM Container Hosting Foundation, see Software Announcement 221-130, dated June 1, 2021.

For information about z/OS V2.4 and CD enhancements for z/OS V2.4, see:

  • Software Announcement 221-213, dated June 22, 2021
  • Software Announcement 221-105, dated March 16, 2021
  • Software Announcement 220-498, dated December 8, 2020
  • Software Announcement 220-483, dated October 13, 2020
  • Software Announcement 220-378, dated September 22, 2020
  • Software Announcement 220-226, dated June 16, 2020
  • Software Announcement 220-102, dated March 17, 2020
  • Software Announcement 219-210, dated December 10, 2019
  • Software Announcement 219-344, dated July 23, 2019
  • Software Announcement 219-013, dated February 26, 2019

For information about IBM z15, see:

  • Hardware Announcement 120-050, dated August 4, 2020
  • Hardware Announcement 120-006, dated April 14, 2020
  • Hardware Announcement 120-013, dated January 14, 2020
  • Hardware Announcement 119-085, dated November 26, 2019
  • Hardware Announcement 119-027, dated September 12, 2019

For information about IBM z14 Model ZR1, see:

  • Hardware Announcement 118-075, dated October 2, 2018
  • Hardware Announcement 118-018, dated April 10, 2018

For information about z14, see:

  • Hardware Announcement 118-075, dated October 2, 2018
  • Hardware Announcement 117-093, dated November 28, 2017
  • Hardware Announcement 117-044, dated July 17, 2017

For information about IBM z13, see:

  • Hardware Announcement 119-039, dated May 7, 2019
  • Hardware Announcement 119-014, dated February 12, 2019
  • Hardware Announcement 116-058, dated June 7, 2016
  • Hardware Announcement 115-055, dated March 3, 2015
  • Hardware Announcement 115-001, dated January 14, 2015

For information about IBM z13s, see:

  • Hardware Announcement 116-058, dated June 7, 2016
  • Hardware Announcement 116-002, dated February 16, 2016



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Business Partner information

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If you are an IBM Business Partner acquiring IBM products or services directly from IBM, you may link directly to Business Partner information for this announcement.

BP Attachment for Announcement Letter 221-388


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Availability of national languages

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Translation information, if available, can be found at the Translation Reports website.



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Program number

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Program number VRM Program name
5650-ZOS 2.5.0 z/OS



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Services

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IBM Systems Lab Services

Systems Lab Services offers infrastructure services to help build hybrid cloud and enterprise IT solutions. From servers to storage systems and software, Lab Services can help deploy the building blocks of a next-generation IT infrastructure to empower a client's business. Lab Services consultants can perform infrastructure services for clients online or onsite, offering deep technical expertise, valuable tools, and successful methodologies. Lab Services are designed to help clients solve business challenges, gain new skills, and apply best practices.

Lab Services offers a wide range of infrastructure services for IBM Power® servers, IBM Storage systems, IBM Z, and IBM LinuxONE. Lab Services has a global presence and can deploy experienced consultants online or onsite around the world.

For assistance, contact Systems Lab Services at ibmsls@us.ibm.com.

To learn more, see the IBM Systems Lab Services website.

IBM Consulting

As transformation continues across every industry, businesses need a single partner to map their enterprise-wide business strategy and technology infrastructure. IBM Consulting is the business acceleration partner to help cocreate change across an organization. IBM specialists can help businesses succeed through finding collaborative ways of working that forge connections across people, technologies, and partner ecosystems. IBM Consulting brings together the business expertise and an ecosystem of technologies that help solve some of the biggest problems faced by organizations. With methods that get results faster, an integrated approach, that is grounded in an open and flexible hybrid cloud architecture, and incorporating technology from IBM Research® and IBM Watson® AI, IBM Consulting enables businesses to lead change with confidence and deliver continuous improvement across a business and its bottom line.

For additional information, see the IBM Consulting website.

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The TSS offers extensive IT maintenance and support services that cover more than one niche of a client’s environment. TSS covers products from IBM and other OEMs, including servers, storage, network, appliances, and software to help clients ensure high availability across their data center and hybrid cloud environment.

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Submit questions or comments to techuid@us.ibm.com.

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Expert Labs deep alignment with IBM product development allows for a strategic advantage as they are often the first in line to get access to new products, features, and early visibility into roadmaps. This connection with the development enables them to deliver First of a Kind (FOAK) implementations to address unique needs or expand a client's business with a flexible approach that works best for their organization.

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These services can help clients deploy and integrate IBM Security software, extend their team resources, and help guide and accelerate successful hybrid cloud solutions including critical strategies such as zero trust. Remote and on-premises software deployment assistance is available for IBM Cloud Pak® for Security, IBM Security QRadar®/QRoC, IBM Security SOAR/Resilient®, IBM i2®, IBM Security Verify, IBM Security Guardium®, and IBM Security MaaS360®.

For more information, contact Security Expert Labs at sel@us.ibm.com.

For additional information, see the IBM Security Expert Labs website.



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IBM Support

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Additional IBM support

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IBM Garage™

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For additional information, see the Washington System Center - IBM Z website.



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Technical information

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Specified operating environment

Hardware requirements

z/OS V2.5 operates on the following IBM Z servers:

  • z15 Models T01 and T02
  • z14 Models M01-M05
  • z14 Model ZR1
  • z13®
  • z13s®

Software requirements

The z/OS base is a system that can be IPLed. There are no software prerequisites to IPL. Specific functions might require additional products not included in the z/OS base or optional features of z/OS. See z/OS V2.5 Planning for Installation (GA32-0890) in IBM Documentation on December 31, 2021 for a list of specific software requirements.

If you run z/OS V2.5 as a guest of IBM z/VM, z/VM must be at a supported level.

Compatibility

Coexistence, release migration, and fallback

z/OS gives you compatibility and flexibility as you migrate systems in a multisystem configuration by enabling multiple releases of z/OS to coexist. This includes non-Parallel Sysplex® and Parallel Sysplex multisystem configurations. Coexistence enables systems within a multisystem configuration to be upgraded to a new release level of z/OS one system at a time. This is contingent on whether the release you are migrating to can coexist with the lowest release running in your multisystem configuration.


Note: These statements represent the current intention of IBM. IBM reserves the right to change or alter the Coexistence-Migration-Fallback policy in the future or to exclude certain releases beyond those stated. IBM development plans are subject to change or withdrawal without further notice. Any reliance on this statement of direction is at the relying party's sole risk and does not create any liability or obligation for IBM.

IBM provides the following coexistence, migration, and fallback for z/OS V2.5:

IBM plans to support an n-2 approach, where three consecutive releases are planned to be supported for coexistence, fallback, and migration. For example, where "n" is z/OS V2.5, IBM intends to enable you to upgrade from z/OS V2.4 directly to z/OS V2.5 with full coexistence, migration, and fallback support to maximize the value of your investment, and from z/OS V2.3 to z/OS V2.5 with full coexistence, migration, and fallback support.

Migration forward as well as fallback should be made within the same z/OS releases supported by the coexistence policy.

Coexistence-Migration-Fallback for z/OS V2.4

Release Coexistence-Migration-Fallback supported with release in column 1
z/OS V2.3 z/OS V2.1, * z/OS V2.2, z/OS V2.3, z/OS V2.4, z/OS V2.5
z/OS V2.4 z/OS V2.2, z/OS V2.3, z/OS V2.4, z/OS V2.5
z/OS V2.5 z/OS V2.3, z/OS V2.4, z/OS V2.5

* z/OS V2.1 end of service was September 30, 2018.

This consistent coexistence, migration, and fallback policy applies to release migrations for all configurations, whether they are:

  • Single-system configurations
  • Individual systems within a multisystem configuration
  • Cases where a simultaneous IPL is used to migrate all systems in a multisystem configuration at the same time

License metric change

  • z/OS V2 is only offered with NALC pricing for clients using NALC for z/OS, V1 who are using PSLC for their middleware programs. z/OS V2 clients using AWLC or WLC or AEWLC or EWLC pricing for their middleware programs must migrate from NALC to zNALC pricing.
  • All z/OS clients using NALC pricing are encouraged to migrate to zNALC pricing to obtain the zNALC advantages such as sub-capacity pricing for z/OS with zNALC supported by the SCRT reports, lower prices above 45 MSUs, and aggregated pricing across qualified Parallel Sysplexes.

Planning information

Direct client support

Direct client support is provided by IBM Operational Support Services - SoftwareXcel Enterprise Edition or SoftwareXcel Basic Edition. These fee services can enhance your productivity by providing voice and electronic access into the IBM support organization. IBM Operational Support Services - SoftwareXcel Enterprise Edition or SoftwareXcel Basic Edition will help answer questions pertaining to usage, how-to, and suspected software defects for eligible products.

Contact your local IBM representative, or your IBM Business Partner, for more information on SoftwareXcel contracts and services.

Security, auditability, and control

Data security and auditability in the z/OS environment are enhanced by the functions available in the optional Security Server for z/OS feature.

The client is responsible for evaluation, selection, and implementation of security features, administrative procedures, and appropriate controls in application systems and communication facilities.



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Ordering information

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Ordering z/OS through the internet

Shopz provides an easy way to plan and order your z/OS packaged offering. It will analyze your current installation, determine the correct product migration, and present your new configuration based on z/OS. Additional products can also be added to your order. Shopz will determine whether all product requisites are satisfied. Shopz is available in all countries. For more details and availability, go to the Shopz website.

New licensees

Not applicable.

For ordering information about the base program, z/OS V2.5, see Software Announcement 221-260, dated July 27, 2021.

Publications

A program directory is supplied automatically with the basic machine-readable material.

To access the unlicensed z/OS product documentation, start at the z/OS Internet Library. It contains direct links to the following repositories and content:

  • IBM Documentation sections for z/OS V2.5 and other supported releases.
  • z/OS V2.5 Library, hosted on Resource Link®, to download individual or grouped PDFs. An IBMid and password are required.
  • Adobe™ Indexed PDF Collections (SC27-8430) to easily conduct offline searches on z/OS product documentation.
  • Downloadable collections of IBM Documentation plug-ins for clients who host their own instances of IBM Documentation for z/OS (KC4z).
  • IBM Z and LinuxONE content solutions, which provide comprehensive and interactive content such as workflows, videos, and content collections.
  • IBM Z Publications Library Archive, to obtain as-is content for out-of-service products and releases.

PDF collections are provided in the Zip format that any modern Zip utility can process.

Subsequent updates (technical newsletters or revisions between releases) to the publications shipped with the product will be distributed to the user of record for as long as a license for this software remains in effect. A separate publication order or subscription is not needed.

Customized Offerings

Product deliverables are shipped only through CBPDO and ServerPac. These customized offerings are offered for internet delivery from Shopz. For more details on internet delivery, go to the Help section on the Shopz website.

IBM recommends internet delivery. However, if you still require physical media, you can choose DVD.

Many products can be ordered in ServerPac the month following their availability in CBPDO. z/OS can be ordered through CBPDO and ServerPac on the planned availability date. Many products will also be orderable in a ServerPac without also having to order the z/OS operating system or subsystem.

Shopz and CFSW will determine the eligibility based on product requisite checking. For more details on the ServerPac, go to the Help section on the Shopz website.

Production of software product orders will begin on the planned availability date.

  • CBPDO shipments will begin within 3 business days after the planned availability date.
  • ServerPac availability and shipments will begin within 3 - 4 weeks after the planned availability date due to additional customization and data input verification.



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Terms and conditions

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Agreement

IBM Client Relationship Agreement (CRA) or IBM Customer Agreement (ICA)

Support lifecycle policy

The program in this announcement uses the Continuous Delivery (CD) support model for the delivery of new function and enhancements that will be available through incremental updates.

Program technical support

CD support

Technical support of a program version or release will be available for a minimum of two years from the planned availability date, as long as your Subscription and Support is in effect.

This technical support lets you obtain assistance (by telephone or electronic means) from IBM for program-specific, task-oriented questions regarding the installation and operation of the program. Software Subscription and Support also provides you with access to versions, releases, and updates (CD releases, Long Term Support Releases or fixes) of the program.

You will be notified, through an announcement letter, of discontinuance of support with 12 months' notice.

For additional information about the IBM Software Support Lifecycle Policy, see the IBM Continuous Delivery Support Lifecycle Policy web page.

Variable charges apply

No

Location license applies

No

Use limitation applies

No

Educational allowance available

Yes, 15% education allowance applies to qualified education institution Clients.

Volume orders

Not applicable.

Multi-Version Measurement

Multi-Version Measurement (MVM) Sub-Capacity charges for the most recent program version are for the combined concurrent peak utilization of the LPARs where any version of the eligible program is used. MVM Full Capacity charges for the most recent program version are for the full capacity of the machine. Program charges are waived for any older eligible versions. MVM does not extend support dates for programs withdrawn from service.

For more information about MVM, including requirements for qualification, see the MVM web page. For a list of eligible programs, see the Sub-Cap MLC web page on the IBM Z software contracts website.

Warranty applies

No

IBM Operational Support Services - SoftwareXcel

For operating system software, the revised IBM Operational Support Services - SoftwareXcel offering will provide support for those operating systems and associated products.

This will ensure total support coverage for your enterprise needs, including IBM and selected non-IBM products. For complete lists of products supported under both the current and revised offering, go to the Supported product list website.



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Statement of good security practices

Top rule

IT system security involves protecting systems and information through prevention, detection, and response to improper access from within and outside your enterprise. Improper access can result in information being altered, destroyed, or misappropriated or can result in misuse of your systems to attack others. Without a comprehensive approach to security, no IT system or product should be considered completely secure and no single product or security measure can be completely effective in preventing improper access. IBM systems and products are designed to be part of a lawful, comprehensive security approach, which will necessarily involve additional operational procedures, and may require other systems, products, or services to be most effective.

Important: IBM does not warrant that any systems, products, or services are immune from, or will make your enterprise immune from, the malicious or illegal conduct of any party.



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Order now

Top rule

To order, contact the IBM Digital Sales Center, your local IBM representative, or your IBM Business Partner. To identify your local IBM representative or IBM Business Partner, call 800-IBM-4YOU (426-4968). For more information, contact the IBM Digital Sales Center.

Phone: 800-IBM-CALL (426-2255)

Fax: 800-2IBM-FAX (242-6329)

For IBM representative: askibm@ca.ibm.com

For IBM Business Partner: pwcs@us.ibm.com



IBM Digital Sales Offices
1177 S Belt Line Rd
Coppell, TX 75019-4642, US

The IBM Digital Sales Center, our national direct marketing organization, can add your name to the mailing list for catalogs of IBM products.


Note: Shipments will begin after the planned availability date.

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Regional availability

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American Samoa, Guam, Marshall Islands, Federated States of Micronesia, Northern Mariana Islands, Palau, Puerto Rico, United States, and US Virgin Islands

Trademarks

z15, IBM Garage and IBM Security are trademarks of IBM Corporation in the United States, other countries, or both.

IBM, z/OS, zEnterprise, Db2, DS8000, IBM Z, IBM z14, IBM z13, IBM z13s, z/VM, Power, ibm.com, IBM Research, IBM Watson, IBM Cloud Pak, QRadar, Resilient, i2, Guardium, MaaS360, AIX, Parallel Sysplex, PIN, IBM Cloud, z13, z13s and Resource Link are registered trademarks of IBM Corporation in the United States, other countries, or both.

UNIX is a registered trademark of The Open Group in the United States and other countries.

The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.

Red Hat and Ansible are registered trademarks of Red Hat Inc. in the U.S. and other countries.

Oracle and Java are trademarks of Oracle and/or its affiliates in the United States, other countries, or both.

Adobe is a trademark of Adobe Systems Incorporated in the United States, and/or other countries.

Other company, product, and service names may be trademarks or service marks of others.

Terms of use

IBM products and services which are announced and available in your country can be ordered under the applicable standard agreements, terms, conditions, and prices in effect at the time. IBM reserves the right to modify or withdraw this announcement at any time without notice. This announcement is provided for your information only. Additional terms of use are located at

Terms of use

For the most current information regarding IBM products, consult your IBM representative or reseller, or go to the IBM worldwide contacts page

IBM United States