Upload
duongthu
View
265
Download
0
Embed Size (px)
Citation preview
z/OS what's new and why upgrade from OS/390
Lightyear Consulting Ltd.Palo Alto, Calgary, Scottsdale, Laguna Beach, Austin
Tel: 1-800-989-6060www.lightyr.com
L I G H T Y E A R
BusinessPartner
Brian LeeSenior [email protected]
August 13, 2003
Agenda
z/OS - Meeting Today's Demands
Importance of z/OS concurrency
z/OS features
Pricing options
z990 z/OS support
z/OS 1.5 and 1.6 preview
Migration strategy
Appendix
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 1-2
z/OS - Meeting Today's Demands
Self-OptimizingDynamic resource balancing with Intelligent Resource Director (IRD)Dynamic transaction management for WebSphere® workloads
Self-ConfiguringSimplified with best-practices definitions: msys for Setup and Wizards
Self-HealingHelp with outage avoidance with msys for OperationsSystem-Managed CF Duplexing
Performance and Scale64-bit support for real and virtual storage for workloads with large memory requirements
IP Networking and Security HiperSockets™ for fast and highly secure inter-partition communicationsIPv6 supportAdvanced cryptography support for industry-leading SSL performanceLarge scale Digital Certificate management (PKI Services)
Application flexibilityOpen standards support: Java™ SDK, XML, C++Robust UNIX® file system with significant performance and availability improvements (zFile System)
Flexible pricing options Sub-capacity pricing for z/OS, middleware and tools with Workload License Charges
Transition to Predictable Annual Releases
Transition begins
New functions
z/OS R3
z/OS R4
z/OS R5
z/OS R2
EIM available via SPE
DFSMS enhancements planned as SPEs
Console Enhancement Feature planned to begin availability in 4Q03
ALS3 planned for z/OS R6 in 9/04
9/02
1Q04
9/04
9/05
3/02
ALS3z/OS R6
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 3-4
The importance of z/OS currencyEnhancements in new releases
Improved e-business security & networkingPerformance, availability, connectivityEase of useFocus on quality
Support for new releases of middleware DB2 V8 requires z/OS 1.3 and zSeriesDomino V6 requires z/OS 1.2JAVA SDK 1.4.1 requires z/OS 1.2
SW pricing flexibilityWLC with subcapacity pricingzELC pricing and z/OS.e on z/800
Exploitation of zSeries servers z/OS 1.4 is the base for z990 support
Continued IBM supportOS/390 2.9 end of service March 03 OS/390 2.10 end of service planned for Sept. 04
Server
Applications
Middleware
Operating System
The base for exploiting future zSeries hardware enhancementsThe last release of z/OS that OS/390 2.10 customers can migrate to in a single
step!
z/OS 1.4
64-bit Virtual Storage:Applications and middleware can store and manipulate data above 2GB Dominant programming model in the future
Importance of 64-bit Virtual Storage:Enhanced data caching (performance)Relieve virtual storage constraint (scale)16 Exabytes of virtual storage
z/OS 64-bit Virtual Storage Roadmap: Assembler support in z/OS 1.2 Future releases will complete the 64-bit virtual requirements for USS, C++, Java ...
IBM plans to deliver DB2 64-bit virtual exploitation in DB2 V8
Software AG announced Adabase is using 64-bit virtual storage for its cache
z/OS: 64-bit Virtual Storage
0
231
264
Below 2GB
User private area
64-bit address space memory map
Bar
~~ ~~
224 Line
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 5-6
z/OS: Intelligent Resource Director
Directing system resources to the priority work
LPAR CPU managementLPAR Clusterz/OS and non-z/OS images
Dynamic channel path managementChannel subsystem priority queuingIntegration of
PR/SMWLMChannel subsystemParallel Sysplex technology
Based on business goals
IP networking among virtual servers in a zSeries ServersImproved response time due to low latencyHighly secureHighly availableCost savings FlexibleSimple to install, operate, maintain
Fast data movement betwen LPARsUp to 1024 devices across up to four HipersocketsUp to 4,000 IP addressesSimilar to cross-address-space memory moveDoes not use CPU cache, thus no effect on other activity
Both 64 bit and 31 bit OS imagesNo physical cablingMinimum pre-requisitesz/OS 1.2, Linux kernel 2.4, z/VM 4.2z900 microcode
HiperSockets - The Network in the Box
z/OS z/OS.e
z800
HiperSockets A
Linux Linux
HiperSockets B
z990/z900/z800
Linux z/OSz/OS
HiperSockets C
z/VM
z/OS
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 7-8
Self Optimizing enhancements delivered in z/OS 1.4
Improve Parallel Sysplex performance by rebalancing batch initiators according to "current" image capacity
WLM can re-distribute initiators over Sysplex members
"Move" initiators to images with capacity, by More aggressively reducing them on constrained systems
Starting new ones on low usage systems
Check for potential rebalancing every 10 seconds
SYS1 SYS2
select select
Batch Queue
free capacity free capacity
Initiator Initiator
Batch Workload Balancing
Self Configuring enhancements delivered in z/OS 1.4
Usability enhancements based on customer feedback and usability tests
Multiple User Support
Improved User Interface
National Language Support
Job Progress Indication
much more....
New msys for Setup functionality
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 9-10
Improved deploymentPlanningConfiguration
Lower skill level needed
Help reduce time
Improved customer satisfaction
User-Centered DesignStep-by-step Q/A process Best practice defaultsWeb-based
z/OS and OS/390 Planning Wizard for e-business z/OS Installation Planning Wizardz/OS UNIX Customization Wizard Parallel Sysplex Customization WizardBase Sysplex Customization Wizardz/OS SDSF Customization Wizardz/OS IP Configuration Wizardz/OS msys for Operations Customization Wizardz/OS DFSMSrmm™ Customization Wizardz/OS DFSMS Migration Planning WizardIBM ~ Security Plannerz/OS Intelligent Resource Director Planning Wizard
ibm.com/servers/eserver/zseries/zos/wizards/
New in 2002
Configuration help on Web
Networking enhancements delivered in z/OS 1.4
Sysplex enablementSysplex-Wide Source VIPASysplex Distributor and IPSecVIPA takeover and IPSec
IPV6 SupportDual Mode TCP/IP stack (IPv4 and IPv6)ftp, otelnetd, rexec, rshd
Simple Network Time Protocol Enable synchronization of clocks between various platforms in a network
TN3270E Server enhancements Support for Transport Layer Security (TLS)
Target Hosts
Network
COUPLINGFACILITY
SOCKETS
TASK 1TASK 2
TASK 3TASK 4
UNIX SERVICES
TCPIP
SOCKETS
TASK 1 TASK 2
TASK 3TASK 4
UNIX SERVICES
TCPIP
SOCKETS
TASK 1TASK 2
TASK 3TASK 4
UNIX SERVICES
TCPIP
SOCKETS
TASK 1 TASK
2
TASK 3TASK 4
UNIX SERVICES
TCPIP
SOCKETS
TASK 1 TASK 2TASK 3TASK 4
UNIX SERVICES
TCPIP
SOCKETS
TASK 1TASK 2TASK 3
TASK 4
UNIX SERVICES
TCPIP
Security Association
Distributor Host
Distributed Connection
Key 1
Key 1
Key 1
Key 1
Switch Switch
OSA-ExpressOSA-Express
Backup Host
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 11-12
---------------------------------------------------------------------------------------------------------------------OS/390 2.10 ESA/390 ESA/390 or
z/Architecture (including 64-bit)---------------------------------------------------------------------------------------------------------------------z/OS 1.1 - 1.5 ESA/390 z/Architecture---------------------------------------------------------------------------------------------------------------------z/OS.e 1.3 - 1.5 z/Architecture (z800 only)---------------------------------------------------------------------------------------------------------------------z/OS 9/04 release z/Architecture---------------------------------------------------------------------------------------------------------------------z/OS.e 9/04 release z/Architecture (z800 only)---------------------------------------------------------------------------------------------------------------------
G5/G6 MP3000 z990/z900 z800
OS/390 and z/OS Supported Environments
G5/G6 MP3000
z/OS base element introduced with z/OS 1.2 Increase availability of systems and applications
Improve system recoverabilityHelp reduce outages due to operations errors
Decrease total cost of ownershipHelp reduce operational complexityGreater operational awareness
Manage System ResourcesCFs, Systems, Consoles, ETRs, CDSs, AUX Shortages, SVCDumps, SLIPs, Critical Messages, Hung Processes
New enhancement to z/OS msys for Ops capabilityHealth Checker prototype
Designed to provide a way to assist installations in implementing best practices to avoid outages
Self Healing...z/OS msys for Operations
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 13-14
Avoid Outages by Implementing Best Practices
msys for Ops
Self-Healing: Automation in the base Reducing Operator ComplexityIncreasing Operational AwarenessReacting Faster to Complicated Recovery Situations
New in z/OSAvailable via the web on OS/390 2.10
Causes of UnplannedApplication Downtime
20%
40%40%
TechnologyFailuresOperator
Errors
ApplicationFailures
Simplify
Detect
Recover
Gartner Results
Healthchecker for z/OS and Sysplex
Best Practices Tool Checks settingsCompares against Best PracticesNotifies when exceptions found
No charge toolAvailable via the web since 1/03 Over 500 downloads already!
z/OS Healthchecker & msys for Ops
zOSPG0380
Designed to provide consistent recovery mechanismBasic recovery for structures that have no other means to recover data May eliminate the need for standalone CF Faster recovery of structures by having the data already in the second CF
Available now via Resource link (ibm.com/servers/resourcelink)
Planned ExploitersCICS® Shared TS, CF data tables, named counterComm Server GR, MNPS (VTAM®), SWSA, SysplexPortsDB2 SCADFSMS VSAM RLS locks, HSM Common Recall Queue IMS ™ CQS, EMH, VSO structures IRLM Lock (DB2 and IMS) JES2 CheckpointMQ Shared queuesWLM Shared enclaves, LPAR clusters (IRD) BatchPipes®
System Logger
Available for z/OS 1.2, 1.3, and 1.4 Technical paper (GM13-0103-03) Available at ibm.com/server/eserver/zSeries/pso
A robust failure recovery capability
System-Managed CF Structure Duplexing
ICF z/OSz/OS ICF
z800/z900/z9xx/G5/G6 z800/z900/z9xx/G5/G6
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 15-16
Improved Availability in sysplex and non-sysplex environmentsEmphasis placed on maintaining overall health of the system and sysplex in stressed environmentsRobust management of WTO message storage improves system availability
Multiple-line messages not queued until completed More efficient message broadcast and deletion
This is an optional feature for z/OS 1.4. Planned availability is 1Q04This function is planned be part of the base in z/OS 1.5
Console Enhancement Feature for z/OS 1.4
Batch R/W
CICS AOR R/W
SMSVSAMTVS
System Logger
VSAM CF
Allows batch update sharing concurrent with CICS on-line access to recoverable data
Addresses the batch window for CICS and batch sharing of VSAM recoverable data sets Allows multiple batch update programs to run concurrently against the same files
Improves system availability with simpler, faster, and more reliable recovery operations for VSAM storage structuresEnables 24 x 7 availability Available as of 6/2003
Transactional VSAM Feature for z/OS 1.4
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 17-18
Basis of WLC changes to LPAR utilization
Total machine Capacity - 300 MSUs
Interval A
Interval A
Interval B
definedcapacity
200
definedcapacity
200
200 MSUs for CICS
300 MSUs for z/OS400 MSUs for z/OS200 MSUs for IMS
Old Terms/Conditions: Pay based on sum of LPAR definitions
(sum of LPARS exceeds CEC size)
190 10075 175
CICSz/OS
IMSz/OS
CICSz/OS
IMSz/OS
Total machine Capacity - 300 MSUs
Interval B
290 MSUs for z/OS175 MSUs for IMS190 MSUs for CICS
New Terms/Conditions: Pay based on combined LPAR utilization(Highest rolling 4-hour avg. LPAR utilization)
190 10017575
CICSz/OS
IMSz/OS
IMSz/OS
CICSz/OS
New Announcement May 13, 2003: WLC base charge has been lowered from 45 MSUs to 3 MSUs
Big Picture View of zSeries Software Pricing
Machine MLC Pricing Metrics IPLA Pricing metricsz900 Workload License Charges
orParallel Sysplex License Charges * ^
Value Unit Pricing%Engine Based
z800 zSeries Entry License ChargeorWorkload License Charges+orParallel Sysplex License Charges * + ^
Value Unit Pricing%Engine Based
Multiprise 3000
Growth Opportunity License Charge* Value Unit Pricing%Engine Based
S/390 Enterprise Server
Parallel Sysplex License Charge* ^ Value Unit Pricing%Engine Based
* this pricing metric allows Usage License Charge (ULC) as an alternative^ this pricing metric allows New Application License Charge (NALC) as an alternative+ this pricing metric is only available on a z800 when the z800 is in a plex% selected WebSphere family products are eligible for Entry Option Value Unit Pricing
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 19-20
z/OS.e - A new Product OfferingA specially priced z/OS offering
A fraction of the cost of z/OS - select function at exceptional price
For enterprise and e-business applicationsFor ERP, CRM, SCM, BI
Web-enabled data transaction processing, applications written in C/C++, Java and J2EE
IBM solutions: WebSphere Application Server, WebSphere Commerce, Domino, DB2, DB2 Intelligent Miner
Only on z800 Occupy full z800 or individual engine(s)
Participate in Parallel Sysplex
Same code base, comparable operating environment as z/OS64 bit, IRD, WLM, Hipersocket, FICON Express, ...
Technically fences traditional data transaction processing workloadSuch as CICS, IMS, COBOL and FORTRAN
z990 Compatibility
6/03
z990 Exploitation
10/03
z/OS 1.4, 1.3, 1.2 OS/390 2.10
Full Crypto (Secure Key and Clear Key)Clear Key Crypto (SSL)
z/OS 1.4 z/OS 1.3, 1.2 OS/390 2.10
z/OS 1.4, 1.3
z/OS 1.4
z990 z/OS Support
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 21-22
z990: z/OS Compatibility & Exploitation Value
z/OS 1.4 Exploitation Up to 30 LPARs on a single server
OS LPAR IDs > 15Access to 512 channels (256 per z/OS image)Secure Encrypted Transactions with Higher Performance via new PCIXCC
CompatibilityOS/390 2.10, z/OS 1.2, 1.3 & 1.4
No more than 15 LPARsOS LPAR IDs < or = 15
Clear Key encryption/decryption on every Processor Unit for z/OS 1.3 and 1.4Continued SSL acceleration via PCICA for z/OS 1.3 and 1.4Increased scale of Hipersocket LANs
Not usablewith
Compatibility software
LCSS0 Up to 256 CHPIDs
LCSS0 Up to 256 CHPIDs
Up to 256 CHPIDs
LCSS1
UserUserRegistriesRegistries
John Smith
Network Network Identity Identity LDAPLDAP
WebSphereWebSphere DCEDCE KerberosKerberos RACFRACF NotesNotes
JohnnyJohnny John SmithJohn Smith J. SmithJ. Smith JohnSJohnS John Smith/John Smith/Rochester/IBMRochester/IBM
. . .Local UserLocal UserIdentitiesIdentities
Data Access and Storage Management: DFSMS enhancementsImproving business continuance and security (DFSMShsm fast replication)
Multi-Level Security (MLS) Higher level trusted computing base for stringent government and industry requirements
Labeled security allows sharing of resources with mixed levels of security in a single imageSingle image of data sharable by multiple government agencies with different need-to-know
Extend IPv6 to commonly used TCP/IP functions Improved Security
PKI Services, Enhanced Intrusion Detection Services
z/OS and z/OS.e Release 5 PreviewPlanned Availability 1Q04
AccessEnterprise Identity Mapping (EIM) Manage the relationship between identities in multiple system and application registriesIBM Project eLiza driven
Cross platform coverageCross applicationsAvailable for z/OS 1.4 via APAR OW57137
Improved efficiency and enhanced security
All statement regarding IBM's future direction and intent are subject to change or withdrawal without notice, and represents goals and objectives only
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 23-24
Improved performance and scalability with 64-bit real and virtual supportrequires z/OS 1.3 for 64-bit virtual support
Improved data sharing performance by batching of GBP writes and castoutsrequires z/OS 1.4 and CFCC CFLEVEL 12
Easier, more flexible, less disruptive recovery with System-level Point in Time recovery
requires z/OS 1.5 DFSMShsm Fast Replicate supportMultilevel Security with Row Granularity
requires z/OS 1.5
DB2 UDB for z/OS V8
Enhances DB2 Backup and RecoveryDB2 Backups are managed by DFSMShsm
DB2 Storage Groups are mapped to DFSMShsm Copy Pool GroupsDFSMS uses FlashCopy or Virtual Concurrent copy to non-disruptively make copies of DB2 Storage GroupsDB2 Logs are adjusted so data integrity is maintained
DB2 Backups are Fast and Non-disruptive Recovery of DB2 Storage Groups is very Quick DFSMShsm makes management of DB2 easier and more efficient by automatically managing the Backup and Recovery of DB2 Storage Groups
DFSMShsm Fast Replication
DFSMShsm Fast Replicationz/OS 1.5 and DB2 V8
May turn hours into minutes!
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 25-26
z/OS 1.6 plans
Increased scaleGreater than 16 engines per z/OS image4 Logical Channel SubSystems (LCSS)60 LPAR support
Full 64-bit virtual runtimeLE's use of Run Time Library Support (RTLS) will be withdrawnThe DLL Rename Utility, part of z/OS LE, will be withdrawn
Start of Single UNIX Specification Version 3 supportNo longer support the ESA/390 Architecture
S/390 G5, G6 and MP3000 are not planned to be supportedThis will eliminate the need for redundant code in z/OS and potentially enable greater exploitation of zArchitecture
All statement regarding IBM's future direction and intent are subject to change or withdrawal without notice, and represents goals and objectives only
From OS/390 To z/OS
31-bit: ESA/390 64-bit: z/Architecture
* z/OS Bimodal Migration Accommodation Offering
z/Architecture Features:
Intelligent ResourceDirector
WorkloadLicenseCharges
HiperSockets
64-bit
OS/390 64-bit
z/OS
64-bitz800/z900
z800/z900
G5/G6MP3000
OS/390 31-bit
G5/G6MP3000
z800/z900
z800/z900
z/OS31-bit
z/OS31-bit
6 monthfallback capability*
OS/390 31-bit
Typical Migration Paths
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 27-28
Assisting OS/390 customers in their migration to z/OS
* Available on z/OS 1.4, 1.3, and 1.2
z/OS Bimodal Migration Accommodation Offering
Responding to customer requests for a safety net during migrationProvides a fallback option to 31-bit when first migrating to z/OS* in 64-bit mode
Available on the Web at ibm.com/servers/eserver/zseries/zos/downloads/Six-month offering beginning with licensing of z/OS to z/Architecture™ server (z800/z900)
Only PSLC pricing available on z900 in 31-bit modeWLC pricing requires z/Architecture (64-bit) mode
zELC pricing available on z800 in 31-bit modeNot available for z/OS.e
z/OS functions not available in 31-bit mode on z/Architecture server:Intelligent Resource Director, HiperSockets, 64-bit Real Storage, 64-bit Virtual Storage and IPv6WLC pricing
New! Bimodal Accommodation Offering for Disaster Recovery
Aid for Migration: z/OS Migration Manual
A guide for the migration implementation activitiesAudience: System ProgrammersMaintained on the z/OS Migration Web site
url: ibm.com/eserver/zseries/zos/installation/zos_migration.htmlUpdated regularly based on IBM and customer experiencesOrganized as a single reference source
A supplement to standard migration documentationAll major steps will be covered with references to detailed instructions
Intended to accelerate the customer's migrationMigration approach used in the manual
Make as many changes as possible before you migrate to z/OSOnce you install z/OS 1.4, make as many required changes as possible before IPL Additional functions can be enabled once z/OS 1.4 is deployed
Enhanced version available!Updates based on customer experiences and feedbackNew "Summary of Changed Interfaces" appendix
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 29-30
Migration strategy
Actions to perform before installing z/OS 1.4migration to the WLM goal mode
Migration Aid: http://www-1.ibm.com/servers/eserver/zseries/zos/wlm/tools/goalmode.htmlSpecifying parameters that will become required in a future release
Specifying CONSOLE names and defining console groups instead of ALTCONSUpdating parameters and options that will become obsolete in a future release
C/C++ compiler options and IP services statement (ASSORTEDPARMS and KEEPALIVEOPTIONS)Finding alternatives for functions that will become obsolete in a future release
LAN Server, SOMObjects ADE, and Library Management functions from ISPF
Actions to perform before the first IPL of z/OS 1.4Reformat ARM couple datasetReformat OMVS couple datasetUse the new resolver component of CSUpdate programs that use LE (non-CICS default options are changed to favor 31-bit applications)
Actions to perform after the first IPL of z/OS 1.4Migrate to a maximum of 999,999 job numbers (only when you decide to raise the limit)Not required, but recommended
Activating z2 mode for JES2Start TCP/IP resolver address space in BPXPRMxx
Appendix
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 31-32
z/OS functions summary (1)
FUNCTION zSeries z800/z900
S/390®
G5/G6/MP3000
Self Management Technology msys for setup x x
msys for Operations x xSystem-managed CF Structure Facility Duplexing x x
USS automatically assigns unique UID/GID x xHSM use of CF structure x x
LDAP failover support x xApplication Flexibility
ISO '98 C++ Standard Library compliance x xSimple Network Time Protocol x x
Support for Java SDK V1.3, 1.4 and XML x xInfoprint® x x
Enhanced ASCII and Unicode® Support x xBulletproof Security
TN3270 support for SSL and TLS x xIntrusion Detection Services x x
Full life-cycle mgmt for Digital Certificates x xUSS Access Control Lists for UNIX file systems x x
Firewall support with dynamic VIPA x x
z/OS functions summary (2)
FUNCTION zSeries z800/z900
S/390G5/G6/MP3000
Increased Scalability & Performance 64-bit Real Storage x
Basic 64-bit Virtual Storage Support x HiperSockets x
PCI Crypto Accelerator Support xIPv6 Support x
zSeries File System x xDynamic Workload ManagementIntelligent Resource Director (IRD) x
IRD for non-z/OS LPARs (Linux® or VM) xDynamic Workload Manager of batch initiators x x
Lower Total Cost of Ownershipz/OS.e (z800 only) x
Sub-Capacity Pricing (WLC on z900) xValue Unit Pricing (on z900) x
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 33-34
Release GA date End of Service date
OS/390 2.8 September 1999 September 30, 2002
OS/390 2.9 March 2000 March 31, 2003
OS/390 2.10 September 2000 at least September 2004(announced)
z/OS 1.1 March 2001 March, 2004 (announced)
z/OS 1.2 October 2001 October, 2004 (projected)
z/OS 1.3 March 2002 March, 2005 (projected)
z/OS 1.4 September 2002 September, 2005 (projected)
Current table available at:ibm.com/servers/eserver/zseries/zos/support/zos_eos_dates.html
End of Service Dates
Techtalk z/OS What's new and why upgrade from OS/390 Aug 13, 2003
Brian Lee Lightyear Consulting 35-36