z/OS MVS System Initialization Logic - Messmer The Brain House

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The following are trademarks of the International Business Machines Corporation in the United States and/or other countries. CICS* DB2* DB2 Universal Database DirMaint ESCON* FICON* GDPS* HiperSockets HyperSwap * Registered trademarks of IBM Corporation IBM* IBM eServer IBM logo* IMS NetView* OMEGAMON* On Demand Business logo Parallel Sysplex* The following are trademarks or registered trademarks of other companies. Java and all Java-related trademarks and logos are trademarks of Sun Microsystems, Inc., in the United States and other countries Linux is a trademark of Linus Torvalds in the United States and other countries.. UNIX is a registered trademark of The Open Group in the United States and other countries. Microsoft is a registered trademark of Microsoft Corporation in the United States and other countries. * All other products may be trademarks or registered trademarks of their respective companies. Zürich | 26. Oktober 2004 RACF* S/390* System z9 System z10 Tivoli* TotalStorage* VSE/ESA VTAM* WebSphere* z/Architecture Trademarks z/Architecture z/OS* z/VM* z/VSE zSeries* zSeries Entry License Charge Notes: Performance is in Internal Throughput Rate (ITR) ratio based on measurements and projections using standard IBM benchmarks in a controlled environment. The actual throughput that any user will experience will vary depending upon considerations such as the amount of multiprogramming in the user's job stream, the I/O configuration, the storage configuration, and the workload processed. Therefore, no assurance can be given that an individual user will achieve throughput improvements equivalent to the performance ratios stated here. IBM hardware products are manufactured from new parts, or new and serviceable used parts. Regardless, our warranty terms apply. All customer examples cited or described in this presentation are presented as illustrations of the manner in which some customers have used IBM products and the results they may have achieved. Actual environmental costs and performance characteristics will vary depending on individual customer configurations and conditions. This publication was produced in the United States. IBM may not offer the products, services or features discussed in this document in other countries, and the information may be subject to change without notice. Consult your local IBM business contact for information on the product or services available in your area. All statements regarding IBM's future direction and intent are subject to change or withdrawal without notice, and represent goals and objectives only. Information about non-IBM products is obtained from the manufacturers of those products or their published announcements. IBM has not tested those products and cannot confirm the performance, compatibility, or any other claims related to non-IBM products. Questions on the capabilities of non-IBM products should be addressed to the suppliers of those products. Prices subject to change without notice. Contact your IBM representative or Business Partner for the most current pricing in your geography. © 2004 IBM Corporation 2
Abstract Zürich | 26. Oktober 2004 Agenda �This presentation will describe the general processing which is involved in initializing a z/OS system, from the IPL process until the system is ready to start either JES2 or JES3 �The major steps described are: �The hardware process of loading z/OS �The loading and initialization of the nucleus �The initialization of general system resources �Master Scheduler Initialization �IBM may change the implementation of internal processing at any time with no prior notice Special Notice �This documentation contains some parts of the presentation “Pulling a System up by its Bootstraps” by Greg Dyck (IBM), SHARE session 2854, March 2000 © 2004 IBM Corporation 3
Page 1: z/OS MVS System Initialization Logi
Page 5 and 6: UCW and UCB Generation Activate usi
Page 7 and 8: Load Parameters IODF dddd LOADxx xx
Page 9 and 10: And all begins with a Mouse Click
Page 11 and 12: Hardware IPL Flow Loc 0 Load Operat
Page 13 and 14: Overview Zürich | 26. Oktober 2004
Page 15 and 16: IPL RIM Processing… 6. process th
Page 17 and 18: Virtual Storage Layout Private Shar
Page 19 and 20: Overview � Initializes basic syst
Page 21 and 22: Non-DASD Pathing Zürich | 26. Okto
Page 23 and 24: DASD Pathing… 1 (P) Path Testing
Page 25 and 26: DASD Pathing… � Dynamic Pathing
Page 27 and 28: NIP RIM Processing… 12. Initializ
Page 29 and 30: NIP RIM Processing… 35. Close mas
Page 31 and 32: MSI Processing Details 1. Initializ
Page 33 and 34: MSI Processing Details… Zürich |
Page 35 and 36: IPCS Display IPL Statistic… *** N
Page 37 and 38: IPCS Display IPL Statistic… IEAVN
Page 39 and 40: Terms and Abbreviations ASM Auixili

z/OS MVS System Initialization Logic - Messmer The Brain House

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