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The (R)Evolution Continues ©2013 IBM Corporation IMS 13 Quick Look GSE BENELUX IMS User Group Meeting June 2013 - Antwerp Belgium Steve Nathan -

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Presentation on theme: "The (R)Evolution Continues ©2013 IBM Corporation IMS 13 Quick Look GSE BENELUX IMS User Group Meeting June 2013 - Antwerp Belgium Steve Nathan -"— Presentation transcript:

1 The (R)Evolution Continues ©2013 IBM Corporation IMS 13 Quick Look GSE BENELUX IMS User Group Meeting June Antwerp Belgium Steve Nathan -

2 2 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Disclaimer © Copyright IBM Corporation All rights reserved. U.S. Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. THE INFORMATION CONTAINED IN THIS PRESENTATION IS PROVIDED FOR INFORMATIONAL PURPOSES ONLY. WHILE EFFORTS WERE MADE TO VERIFY THE COMPLETENESS AND ACCURACY OF THE INFORMATION CONTAINED IN THIS PRESENTATION, IT IS PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. IN ADDITION, THIS INFORMATION IS BASED ON IBM’S CURRENT PRODUCT PLANS AND STRATEGY, WHICH ARE SUBJECT TO CHANGE BY IBM WITHOUT NOTICE. IBM SHALL NOT BE RESPONSIBLE FOR ANY DAMAGES ARISING OUT OF THE USE OF, OR OTHERWISE RELATED TO, THIS PRESENTATION OR ANY OTHER DOCUMENTATION. NOTHING CONTAINED IN THIS PRESENTATION IS INTENDED TO, NOR SHALL HAVE THE EFFECT OF, CREATING ANY WARRANTIES OR REPRESENTATIONS FROM IBM (OR ITS SUPPLIERS OR LICENSORS), OR ALTERING THE TERMS AND CONDITIONS OF ANY AGREEMENT OR LICENSE GOVERNING THE USE OF IBM PRODUCTS AND/OR SOFTWARE. IBM, the IBM logo, ibm.com, and IMS are trademarks or registered trademarks of International Business Machines Corporation in the United States, other countries, or both. If these and other IBM trademarked terms are marked on their first occurrence in this information with a trademark symbol (® or ™), these symbols indicate U.S. registered or common law trademarks owned by IBM at the time this information was published. Such trademarks may also be registered or common law trademarks in other countries. A current list of IBM trademarks is available on the Web at “Copyright and trademark information” at

3 3 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Acknowledgement  This presentation was originally prepared by Diane Goff –IBM Advanced Technical Solutions (ATS)  Additional material is from Alison Coughtrie –European IMS Architecture Team

4 4 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Agenda  Status of IMS Versions  Prerequisites, Migration, Coexistence  System Enhancements  Transaction Manager and Connectivity Enhancements  Database and DBRC Enhancements

5 5 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Introducing IMS13 – Smarter Than Ever!  IMS 13 Quality Partnership Program Announced on October 3, 2012 –Program began on December 14, 2012 –QPP participants have installed and are testing IMS 13 –General availability of IMS 13 will be announced at a later date.  Announcement Letter available on ibm.comibm.com  Current Status –12 customers in IMS 13 QPP in 2013 –All customers through Sandbox production –5 customers have IMS 13 in AD environments –3+ targeted for full production by GA

6 6 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Status of IMS Versions  IMS Version 9 –End of service was November 7, 2010  IMS Version 10 –Generally available on October 26, 2007 –End of service was November 5, 2012  IMS Version 11 –Generally available on October 30, 2009 –Will be withdrawn from Marketing on September 9, 2013 –End of service has not been announced  IMS Version 12 –Generally available on October 28, 2011 –End of service has not been announced  IMS Version 13 –Announced on October 3, 2012 –Currently in QPP program –General availability has not been announced

7 7 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Software Prerequisites  Minimum software level prerequisites –z/OS V1R13 (5694-A01) RACF (included in separately orderable SecureWay Security Server), or equivalent, if security is used High Level Assembler Toolkit Release 5 ( ) APAR OA39392 / PTF UA66823 is required for z/OS 1.13 for IMS V13 –IRLM 2.3 if the IRLM is used * subject to change

8 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Software Prerequisites...  Minimum software levels for optional functions –Java Dependent Regions requires JDK –ISC TCP/IP requires CICS 5.1 –Depending on the environment, the IMS Universal Drivers require: IBM JDK or later DB2 V9.1 or later WAS V7 or later CICS V4.1 or later –DB Versioning requires implementation of the IMS Catalog * subject to change

9 9 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Software Prerequisites...  Minimum software levels for optional functions... –IMS 13 supports interactions with DB2: Versions 9, 10 CICS: Versions 3.2, 4.1, 4.2, 5.1 –CICS 5.1 (newly announced) is required for ISC TCP/IP support Requires z/OS 1.13 MQ for z/OS: Versions V7.0.1, V7.1 –Note V6 EOS was September 2012 –7.01 introduced MQ message expiry interfacing with IMS transaction expiration –7.1 enhanced the expiry support and support for OTMA resource monitoring protocol messages * subject to change

10 10 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Hardware Prerequisites  IMS 13 runs only on 64 bit processors running in z/Architecture mode –Processors must also support the Long-Displacement Facility of the z/Architecture –ESA mode is not supported –For a list of z/Series machines see:  z900 machines must be at GA2 level (microcode level 3G or later)

11 11 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Hardware Prerequisites...  Sysplex Data Sharing (including Data Caching and VSO Data Sharing) –Coupling Facility (CF) level 9, or later  Shared Queues and Shared EMH support –Coupling Facility level 9 or later –System-managed CF Duplexing CF level 12, or later and bidirectional CF to CF links  EAV support for non-VSAM data sets –EAVs are supported on DS8000 at microcode level R4.0 via bundle (Sept 2008) or higher

12 12 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Supported Migrations and Coexistence  IMS 12 to IMS 13 –Upgrade RECONs from IMS 12 to IMS 13 –Databases are compatible –Application programs are compatible  IMS 11 to IMS 13 –Upgrade RECONs from IMS 11 to IMS 13 –Databases are compatible –Application programs are compatible  Check Release Planning documentation at GA for additional prerequisites/coexistence/migration items

13 13 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS 13 System Enhancements  IMS Connect Enhancements  Concurrent Application Threads  Reduced Total Cost of Ownership (TCO)  IMS Command Enhancements  IMS CQS Enhancement  IMS DRD Enhancement  IMS User Exit Enhancements  IMS Security Enhancements  /DIAG Command Enhancements

14 14 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS Connect Enhancements  XML Converter Enhancements  Auto-restart of the Language Environment (LE)  Expanded Recorder Trace Records  Use of RACF Event Notification Facility (ENF) Support for cached RACF UserIDs (UID)  Reporting of overall health to Workload Manager (WLM)  Configurable TCP/IP backlog (queue) size

15 15 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look XML Converter Enhancements  Support for extending the current limit of 100 up to 2000 for the maximum number of XML converters New IMS Connect configuration parameter MAXCVRT ADAPTER(…, MAXCVRT= value) IMS 12 (PM64487 / UK79728)  Capability to view converters that are currently loaded –New Type-2 Command: QUERY IMSCON TYPE(CONVERTER) Requests detailed information about XML converters in IMS Connect  Benefits –Enhances the flexibility of converter usage Directly impacts IMS Soap Gateway environments

16 16 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Auto-restart of the Language Environment (LE)  Automated mechanism to reinitialize the Language Environment when an XML converter ABENDs –Without restarting IMS Connect –Converters will be reloaded as they are needed  Automatic refresh of the BPE User Exit for the XML Adapters (HWSXMLA0) after the ABEND limit ABLIM has been reached  Benefit –Improved efficiencies during error conditions Eliminates IMS Connect restart and user interactions

17 17 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Expanded Recorder Trace Records  The Recorder trace records have been expanded to: –Capture entire messages sent and received using: All TCP/IP communications –Including DRDA sockets and ISC TCP/IP SCI (OM, ODBM, MSC, and ISC communications) Requires a Trace Level HIGH and use of the external trace data set UPDATE TRACETABLE NAME(RCTR) OWNER(HWS) LEVEL(HIGH) EXTERNAL(YES | NO)  Benefits –Improved diagnostics and problem determination

18 18 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look RACF Event Notification Facility (ENF) Support  Background –IMS Connect V12 provided the option to cache RACF UserIDs (UIDs) along with a command to refresh them  IMS Connect V13: RACF ENF Support for Cached UserIDs (UID) –Automatically refreshes cached UIDs by listening to RACF events (ENF signals) indicating that a change has been made to a UID –NOTE: This function applies only when RACF UID caching has been enabled in IMS Connect  Benefit –Allows IMS Connect to listen for certain RACF events indicating that a change has been made to a specific UserID Avoids manual intervention

19 19 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Reporting of Overall Health to WLM  WLM (Workload Manager) Health Report –New function to automatically report the overall health of IMS Connect Allows Sysplex Distributor to use and take into account this information for workload balancing  Benefit –Allows WLM to know when resources are constrained or available –Minimizes the possibility of Sysplex Distributor assigning work that IMS Connect is unable to handle

20 20 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Configurable TCP/IP backlog (Queue) size  New parameter TCPIPQ –Allows users to configure the length of the queue in TCP/IP for connection requests that have not yet been assigned a socket. Connection requests are held on this queue until IMS Connect can assign a socket –Overrides the default which is equal to the maxsoc value Actual value used is the smaller of IMS Connect’s TCPIPQ value and SOMAXCONN in TCP/IP  Benefit –Provides a configurable option to increase the backlog queue size in TCP/IP

21 21 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Overall Value of IMS Connect Enhancements  Enhanced usability while providing better performance and diagnostics  Increased resiliency to Abnormal Ends (ABENDs)  Improved usability and manageability

22 22 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Concurrent Application Threads Enhancement  Partition Specification Table (PST) used for –Active dependent regions (MSG/BMP/IFP/JMP/JBP) –CICS/DBCTL threads –Open Database Access threads  Customers continue to require more PSTs! –15 dependent regions - 197? (IMS 360) –31 dependent regions (IMS 1.1.6) –999 dependent regions (IMS 5.1) –4095 dependent regions (IMS 13)  Related parameters –MAXPST= –PST= –MAXTHRDS= for ODBM –MAXTHRDS=, MINTHRDS= for DBCTL

23 23 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look MAXPST= parameter  Used in DBC, DCC, and IMS procedures –Specifies the maximum number of PSTs for an online IMS control region –Default is 255 (no change) –Maximum value is 4095 in IMS 13 (quadrupled)  Controls maximum number of –Active dependent regions (MSG/BMP/IFP/JMP/JBP) –CICS/DBCTL threads –Open Database Access threads  Reducing MAXPST= requires a cold start

24 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Benefits of the Concurrent Thread Enhancement  Customers can now have increased capacity/scalability for their IMS systems –Larger capacity for mergers/acquisitions Without having to add more IMS images –Increased workloads with latest zEnterprise hardware Room for vertical growth –More regions for IMS 13 synchronous program switch function, also synchronous callout, distributed syncpoint/etc. Longer region occupancies  MAXPST should no longer be a limiting factor in IMS growth

25 25 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Reduced Total Cost of Ownership  Cross-platform focus on reducing mainframe software costs  Major focus on reducing CPU usage  Changes throughout IMS to improve performance, reduce storage usage and reduce CPU used to run IMS –Using more efficient storage services –Improved algorithms –Reducing pathlength –Optimizing frequently used processes –Latch / lock improvements –Storage reductions –Use of zEnterprise hardware functions

26 26 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Specific Reduced TCO Enhancements  IMS logger LOG latch contention reduction –Improves usage of log latch and log buffer management for increased logging bandwidth and more efficient processing  Shared queues local first optimization now applies to program-to-program switch messages as well as ordinary input messages –Avoids false scheduling on another IMS when the local IMS can process the program-to-program switch message  Exploitation of pageable 1M pages –Based on usage of new zEC12 processors with Flash Express storage and z/OS 1.13 (Dec. 2012) –Provides improvements in dynamic address translation and usage of translation lookaside buffer (TLB)  DB Space Management Block Serialization Latch Improvements –Split from single to multiple latches to improve heavy BMP workloads  MEMDSENQMGMT Exploitation –More efficient memory-based data set ENQ management improves allocation of large number of data sets

27 27 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Other Reduced TCO Enhancements  OTMA YTIB chain changed from a single linked list to a hash table, to improve FINDDEST performance.  Convert OTMA and IMS Connect STORAGE calls to CPOOL  Remove unnecessary clearing of OTMA buffers  DFSCPY00 improved SVC directory entry search algorithm and removal of IVSK instructions.  OSAM CML Lock Reduction  General instruction optimization (replacing STCK with STCKF, long displacement facility exploitation)  IMS cache manager spin loop elimination  CQS mainline modules changed to use branch-relative branching  Cache efficiency improvements (DPST blocks packed into a single IPAGE to keep cache references localized)  IMS page load service algorithm optimization  IMS dispatcher optimizations

28 28 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look ESAF support in Java Dependent Regions (JDR)  With IMS 13, there are two methods for accessing DB2 from JDRs –Access via the previously existing DB2 RRSAF interface –Access via the standard ESAF interface  With IMS 13, the ESAF interface can be used in JMP/JBP regions to access any ESAF defined to the IMS control region –WebSphere MQ, DB2, WOLA (WebSphere Optimized Local Adapter)  Support for the SSM= parameter on the JMP/JBP dependent region startup JCL  Only one ESS connection method allowed per JMP/JBP –Default ESS connection method is DB2 RRSAF No impact to existing users

29 29 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS Command Enhancements Overview  DBRC command enhancements  DEDB Alter command enhancements  /DIAGNOSE SNAP command enhancement  HALDB command enhancements  IMS Connect type-2 command enhancements –Dynamically create data store definitions (CREATE IMSCON TYPE(DATASTORE)) –Dynamically create port definitions (CREATE IMSCON TYPE(PORT)) – Query XML converters loaded in IMS Connect (QUERY IMSCON TYPE(CONVERTER)

30 30 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS Command Enhancements  Enhancements are focused on type-2 commands for the Operations Manager (OM) environment  Benefits –Support of new IMS 13 functions –Improved manageability

31 31 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS CQS Enhancement  When IMS Common Queue Server (CQS) rejects a z/OS STOP cqsjobname command because CQS clients are still connected (CQS0300I), CQS issues a new message, CQS0301I, for each connected client –Enables the operator to shut down or quiesce the connected CQS clients so that the CQS address space can be stopped  Benefits –Improved manageability for CQS

32 32 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS DRD Enhancement  Support for the IMS repository (a single centralized store for resource definitions in an IMSplex) enhanced to validate resource attributes between associated resources when a resource definition is added to, updated in, or deleted from the IMSRSC Repository –Validates transaction, routing code, and program attributes  Also provided through the IMS 12 service process –APAR PM32805 / PTF UX75915  Benefits –Simplifies management of the DRD resources

33 33 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS 13 User Exit Enhancements  Enhanced user exit services extended to additional IMS control region user exits  Users can now dynamically refresh more IMS user exit routines to bring in an updated version of the exit (or add/delete) –Significantly reduces downtime since IMS control region no longer requires restart  Users can now display information about more user exits that are defined in the USER_EXITS section of DFSDFxxx –Provides useful exit information to the user  Users can now code an exit to leverage IMS’s ability to call multiple routines of the same type from a single point within the exit

34 34 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look  BSEX (DFSBSEX0, Build Security Environment Exit)  NDMX (DFSNDMX0, Non-Discardable Message Exit)  RASE (DFSRAS00, Resource Access Security Exit)  OTMAYPRX (DFSYPRX0, OTMA Destination Resolution Exit)  OTMARTUX (DFSYRTUX, OTMA Resume TPIPE Security Exit)  OTMAIOED (DFSYIOE0, OTMA Input/Output Edit Exit)  LOGWRT (DFSFLGX0, Logger Exit)  LOGEDIT (DFSFLGE0, Log Edit Exit) Enhanced User Exit Services Added to More Control Region Exit Types

35 35 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS Security Enhancements  All IMS security settings can now be defined as IMS startup parameters –Updates to SECURITY macro in system definition (SYSGEN) no longer required due to its removal –Previously, certain settings could only be defined in SECURITY macro  Move security user exits out of the IMS nucleus into 31-bit storage –DFSCSGN0 –DFSCTRN0 –DFSCTSE0

36 36 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look New IMS Startup Security Parameters  RCLASS parameter added to DFSPBxxx in PROCLIB –RCLASS support in DFSDCxxx PROCLIB member will remain DFSPBxxx RCLASS parameter value will override DFSDCxxx if specified in both  SECCNT parameter added to DFSDCxxx in PROCLIB  Retrofit SPE APARs/PTFs available for IMS startup security parameter enhancement activation in IMS 11 and IMS 12 –PM48203/UK74050 (IMS 11) –PM48204/UK74051 (IMS 12) –If specifying RCLASS in DFSPBxxx/DFSDCxxx, can also have the following APARs/PTFs applied to avoid an error message being issued when it shouldn’t be PM72199/UK82616 (IMS 11) PM73558/UK82617 (IMS 12)

37 37 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look /DIAGNOSE Command Enhancements  Process for capturing diagnostic data used in troubleshooting IMS issues has been simplified –SYSOUT option now available for /DIAGNOSE SNAP output Documentation can be gathered/stored in a readable format that is easy to retrieve and send to IBM support Time-consuming SYSLOG searches and manual data formatting prior to transmission no longer required –/DIAGNOSE SNAP command extended to include more resources + more coverage of existing resources SHOW() support added for LTERM, NODE and USER BLOCK – can now specify multiple single instance blocks and more blocks can be snapped More blocks can be snapped for DB, LINE, LINK MSNAME support added

38 38 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look /DIAGNOSE Command Enhancements  Benefits –Cost effective, non-disruptive alternative to console dumps –/DIAGNOSE command is now more interactive Can be used more as a tool for easing the real-time diagnosis process –Decreased time and effort required in capturing diagnostic information –Improved turn-around time in problem resolution

39 39 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Summary of IMS 13 System Topics  IMS Connect Enhancements  Concurrent Application Threads  Reduced Total Cost of Ownership (TCO)  IMS Command Enhancements  IMS CQS Enhancement  IMS DRD Enhancement  IMS User Exit Enhancements  IMS Security Enhancements  /DIAG Command Enhancements

40 40 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS 13 Transaction Manager and Connectivity Enhancements  Callout function enhancements  ISC Over TCP/IP  OTMA enhancements  Non-Discardable Message Exit (DFSNDMX0) enhancements

41 41 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Callout Function Enhancements  Synchronous program switch  Enhancements to RECEIVE function for handling truncated messages  OTMA destination descriptors support asynchronous messages that are going to IBM WebSphere® MQ

42 42 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Background  DL/I ICAL support from previous IMS releases –Provided synchronous callout capability to resources outside IMS IMS SOAP GATEWAY z/OS IMS Database DB Services OTMA TM/CTL Services IMS Connect TCP/IP user-written Client WebSphere IMS TM resource adapter Application Program ICAL MPP/JMP/IFP/BMP/JBP OTMA Descriptor OTMA Descriptor

43 43 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Synchronous Program Switch  New capability that enhances the DL/I ICAL support –Allows an IMS application program to synchronously call and wait for a reply from another IMS application program Within the calling program’s UOW Database IMS DB services IMS dependent region IMS TM services MPP, JMP IFP, MD BMP OTMA Application Program ICAL IMS SOAP GATEWAY IMS Connect TCP/IP user-written Client WebSphere IMS TM resource adapter

44 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Synchronous Program Switch...  Highlights –An enhancement to the DL/I ICAL to invoke another IMS application In the same IMS In a different IMS –In a Shared Queues back-end –Across an MSC link –And synchronously receive the response back during the same UOW –IMS internally schedules the transaction initiated by the ICAL call as an OTMA transaction Uses a new type of OTMA destination descriptor (TYPE=IMSTRAN) which has been introduced specifically for synchronous program switch support –And the target transaction can be An IFP, MPP, MD BMP, or JMP in IMS TM or TM/DB environments MPP1 MPP4 MPP3 ICAL IMS1 MPP2 IMS X IMS2 MSC Shared Msg Queues

45 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Synchronous Program Switch...  Usage examples –Applications can issue multiple ICALs to different destination TYPEs Synchronous callout Synchronous program switch ICAL DEST1 ICAL TRANB TRANA IMS CTL Region IMS Connect WebSphere IMS TMRA IMS SOAP Gateway TCP/IP RYO pgm OTMA MSG-Q Destination Descriptor TYPE(IMSCON) TRANB GU IOPCB ISRT IOPCB Destination Descriptor TYPE(IMSTRAN) GU, IOPCB

46 46 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Synchronous Program Switch...  Considerations –To use synchronous program switch in a shared queues environment, all of the participating IMS systems must be Version 13 or later and have a MINVERS value of 13.1 –New design implications Timeout values Transaction Expiration Late Responses LTERM Override ALTPCB destinations Multiple ICALs Recursive requests Holding database locks across an ICAL request –Increased importance for performance tooling

47 47 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Support for Truncated Messages  The RECEIVE subfunction of the DL/I ICAL is enhanced to enable applications to efficiently receive large messages that did not fit into a previously specified response area.  New “RECEIVE” subfunction code can be used to get truncated message –IMS 13 keeps a copy of the entire response message in the control region private storage  Benefit –Provides the ability to complete the retrieval of a reply message Without having to re-issue a complete ICAL “SENDRECV” and associated network transmission costs

48 48 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look ISC Over TCP/IP  ISC Over TCP/IP value proposition –New option that supports TCP/IP network connectivity for Intersystem Communication (ISC) connections IMS – CICS  Provides a strategic protocol alternative to SNA/VTAM Allows an all inclusive TCP/IP solution for networks

49 49 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look ISC Over TCP/IP  Highlights –Supports both static and dynamic terminals Static terminal definitions –SYSGEN stage 1 TYPE, TERMINAL, SUBPOOL macros –DFSDCxxx PROCLIB member Dynamic terminal specification –Logon descriptors in the DFSDSCMx or DFSDSCTy PROCLIB member –Leverages IMS Connect Enhancements to the HWSCFGxx configuration member –No IMS Connect user message exit changes –Uses CSL to communicate between IMS and IMS Connect Requires Structured Call Interface (SCI) and Operation Manager (OM) –Requires CICS Transaction Server for z/OS 5.1

50 50 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look ISC Over TCP/IP  Either IMS or CICS can initiate the request IMS INPUT INPUT Transaction REPLY IMS Connect CICS SCI TCP/IP Initiating a CICS transaction from IMS using an ISC TCP/IP connection INPUT REPLY tran OR tran Msg Switch IMS End User Process transaction IMS REPLY IMS Connect CICS SCI TCP/IP Initiating an IMS transaction from CICS using an ISC TCP/IP connection CICS End User Process transaction Tx. 1 Tx. (Start/Retrieve) INPUT Transaction 6 REPLY

51 51 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look OTMA Enhancements …  OTMA destination descriptor enhancements –TYPE={MQSERIES} Provides asynchronous callout and messaging support (ISRT ALTPCB) –EXIT={YES | NO} Specifies whether or not the OTMA exits are to be called  Corresponding enhancement to IMS Type-2 OTMADESC commands –[CREATE | UPDATE | DELETE |QUERY] OTMADESC Recovered across warm and emergency restarts  Benefits –Simplifies asynchronous messaging to WMQ –Removes the need to code the OTMA exits, DFSYPRX0 and DFSYDRU0 –Provides dynamic change capability with the Type-2 commands

52 52 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look OTMA Enhancements  OTMA early termination notification –Enhancement that allows OTMA to leave the XCF group earlier in termination processing Allows OTMA clients (IMS Connect, WebSphere MQ, OTMA C/I) to be notified of the termination via their XCF Group Exit –Can route requests to other systems –Addresses issues associated with transactions messages being accepted but not processed –Function being added to IMS 12: APAR PM73869

53 53 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Enhancements for the Non-Discardable Messages Exit Routine  Customer requirement for a new function to PSTOP an abending transaction –Stops scheduling but allows queueing to continue  New functions provided by for the DFSNDMX0, the Non-Discardable Messages exit routine –IMS 11 APAR PM67950 / PTF UK81040 –IMS 12 APAR PM45943 / PTF UK71989 –Included in IMS 13

54 54 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Summary of IMS 13 Transaction Manager and Connectivity Topics  Callout function enhancements  ISC Over TCP/IP  OTMA enhancements  Non-Discardable Message Exit (DFSNDMX0) enhancements

55 55 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look IMS 13 Database and DBRC Enhancements  Database Versioning  HALDB Alter  DEDB Alter  DBRC Enhancements

56 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Database Versioning Overview …  Database Versioning provides the ability to assign user-defined version identifiers to different versions of a database structure –Enables structural changes to a database while providing multiple views of the physical IMS data to application programs  Applications referencing a new physical database structure can be brought online without affecting applications that use previous database structures –Applications which do not require sensitivity to the new physical structure, do not need to be modified and can continue to access the database

57 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Database Versioning Overview  Database Versioning supports the following database types –DEDB, HDAM, HIDAM, PHDAM, PHIDAM  Can be used in conjunction with the database alter functions to keep track of different versions of the structure of a database –only supports the following database structure changes For all supported database types –Increasing the length of a fixed-length segment –Adding a new field to space at the end of a fixed-length segment For Full-Function and HALDB database types –Adding new field(s) that remap existing field(s) and space at the end of a fixed-length segment Variable-length segments are not supported

58 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look  Database Versioning must be enabled in DFSDFxxx DATABASE section  Versioning is at the DBD level –Users define the version of a database definition on the DBD –Version numbers must be maintained in incremented values  Database Versioning requires enablement of the IMS catalog –DBD definitions for versioned databases must be in the IMS catalog  Application programs can elect the desired database version –Specifying the version number on the PCB of the PSB –Specifying the version number on a DL/I INIT VERSION call Database Versioning Requirements

59 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look  DFSDFxxx PROCLIB: new DATABASE section keywords –Specify whether database versioning is enabled and default version DBVERSION= DBLEVEL=  Database and Program Generation Statements –Specify the database version number DBD: DBVER= PCB: DBVER= –Override the default versioning specified in DFSDFxxx PSBGEN: DBLEVEL=  “INIT VERSION” DL/I Call –Overrides the version number that is specified on the PCB statement –Must be issued before issuing a DL/I DB call to the database Database Versioning Implementation

60 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look HALDB Alter Overview …  Structural changes can be made to HALDB databases while the database remains online –Add a new field to space at the end of an existing segment –Increase the length of an existing segment –Define new fields that remap existing fields and space in an existing segment –Fixed-length segments only  Benefit –Make structural changes to a database while maintaining database availability A B C A CB

61 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look HALDB Alter Overview  HALDB Alter is only supported for database types: –PHDAM –PHIDAM  After changes are made to the DBD segment definition –Type-2 INITIATE OLREORG command is used to alter a database from the current structure to the new structure Type-1 command /INITIATE OLREORG does not support altering a HALDB –Online Change commands are used to bring the changed ACBLIB DBD member online –Application programs can start using the new database structure

62 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look Add a new field to space at the end of a segment FIELD 1 FIELD 2Space FIELD 2 Space New FIELD 3 Example 1 Example 2 FIELD 1 FIELD 2 Space New FIELD 3 Space

63 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look FIELD 1 FIELD 2 New SpaceFIELD 2 Increase the length of an existing segment Example 1 Example 2 FIELD 1 FIELD 2 New Space Space

64 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look HALDB Alter Prerequisites  Software requirements –CSL SCI OM –DBRC RECON MINVERS (‘13.1’)

65 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look DEDB Alter  IMS 13 adds ability to dynamically change DEDB specifications ̶ Users can dynamically change UOW, SIZE, ROOT, Randomizer while DEDB is online ̶ New DEDB Alter utility is used for DEDB changes ̶ DRD is not required for DEDB Alter ̶ Supports VSO Areas if /VUNLOAD is done before DEDB Alter is executed  Benefits ̶ Improved management of DEDB definitions Eliminate system down time for modifications to DEDB definitions Improve data availability since changes are done while DEDB is online

66 GSE BENELUX IMS User Group Meeting – June IMS 13 Quick Look DEDB Alter Utility  The new DEDB Alter utility is used to change the following items without taking the area offline –The SIZE, UOW, or ROOT specifications of a DEDB area –The randomizer that is used for the DEDB area  Requirements –A two-stage randomizer must be used, which enables areas to be processed individually. –DEDBs to be altered must be registered to DBRC –The MINVERS value in the RECON data set for all IMS subsystems that share the DEDB area must be at “13.1” or later –If SDEPS present, only the randomizer name can be changed

67 67 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look DBRC Enhancements  Command support for HALDB Alter  Command support for DEDB Alter  MINVERS value of ’13.1’ must be set to use HALDB Alter, DEDB Alter, or synchronous program switch in a shared queues environment  Supported Migration and Coexistence –IMS 11 to IMS 13 Apply DBRC coexistence SPE APAR PM53134 to IMS 11 –PTF UK80026 Allow IMS 11 to understand IMS 13 RECON records –IMS 12 to IMS 13 Apply DBRC coexistence SPE APAR PM53139 to IMS 12 –PTF UK80027 Allow IMS 12 to understand IMS 13 RECON records

68 68 GSE BENELUX IMS User Group Meeting – June 2013 IMS 13 Quick Look Summary of IMS 13 Database Manager and DBRC Topics  HALDB Alter  DEDB Alter  Database versioning  DBRC enhancements


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