Operating Systems Overview
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Job Scheduling for SAP® Contents at a Glance
Kees Verruijt, Arnoud Roebers, Anjo de Heus Job Scheduling for SAP® Contents at a Glance Foreword ............................................................................ 13 Preface ............................................................................... 15 1 General Job Scheduling ...................................................... 19 2 Decentralized SAP Job Scheduling .................................... 61 3 SAP Job Scheduling Interfaces .......................................... 111 4 Centralized SAP Job Scheduling ........................................ 125 5 Introduction to SAP Central Job Scheduling by Redwood ... 163 6Installation......................................................................... 183 7 Principles and Processes .................................................... 199 8Operation........................................................................... 237 9Customer Cases................................................................. 281 The Authors ........................................................................ 295 Index .................................................................................. 297 Contents Foreword ............................................................................................... 13 Preface ................................................................................................... 15 1 General Job Scheduling ...................................................... 19 1.1 Organizational Uses of Job Scheduling .................................. -
Tutorials Point, Simply Easy Learning
Tutorials Point, Simply Easy Learning UML Tutorial Tutorialspoint.com UNIX is a computer Operating System which is capable of handling activities from multiple users at the same time. Unix was originated around in 1969 at AT&T Bell Labs by Ken Thompson and Dennis Ritchie. This tutorial gives an initial push to start you with UNIX. For more detail kindly check tutorialspoint.com/unix What is Unix ? The UNIX operating system is a set of programs that act as a link between the computer and the user. The computer programs that allocate the system resources and coordinate all the details of the computer's internals is called the operating system or kernel. Users communicate with the kernel through a program known as the shell. The shell is a command line interpreter; it translates commands entered by the user and converts them into a language that is understood by the kernel. Unix was originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Douglas McIlroy, and Joe Ossanna. There are various Unix variants available in the market. Solaris Unix, AIX, UP Unix and BSD are few examples. Linux is also a flavour of Unix which is freely available. Several people can use a UNIX computer at the same time; hence UNIX is called a multiuser system. A user can also run multiple programs at the same time; hence UNIX is called multitasking. Unix Architecture: Here is a basic block diagram of a UNIX system: 1 | P a g e Tutorials Point, Simply Easy Learning The main concept that unites all versions of UNIX is the following four basics: Kernel: The kernel is the heart of the operating system. -
Unit V Algorithm for Booting the UNIX System
Unit V Algorithm for booting the UNIX system : As we’ve noted, the boot process begins when the instructions stored in the computer’s permanent, nonvolatile memory (referred to colloquially as the BIOS, ROM,NVRAM, and so on) are executed. This storage location for the initial boot instructions is generically referred to as firmware (in contrast to “software,” but reflecting the fact that the instructions constitute a program[2]). These instructions are executed automatically when the power is turned on or the system is reset, although the exact sequence of events may vary according to the values of stored parameters.[3] The firmware instructions may also begin executing in response to a command entered on the system console (as we’ll see in a bit). However they are initiated, these instructions are used to locate and start up the system’s boot program , which in turn starts the Unix operating system. The boot program is stored in a standard location on a bootable device. For a normal boot from disk, for example, the boot program might be located in block 0 of the root disk or, less commonly, in a special partition on the root disk. In the same way, the boot program may be the second file on a bootable tape or in a designated location on a remote file server in the case of a network boot of a diskless workstation. There is usually more than one bootable device on a system. The firmware program may include logic for selecting the device to boot from, often in the form of a list of potential devices to examine. -
JES3 Commands
z/OS Version 2 Release 3 JES3 Commands IBM SA32-1008-30 Note Before using this information and the product it supports, read the information in “Notices” on page 431. This edition applies to Version 2 Release 3 of z/OS (5650-ZOS) and to all subsequent releases and modifications until otherwise indicated in new editions. Last updated: 2019-02-16 © Copyright International Business Machines Corporation 1997, 2017. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents List of Figures....................................................................................................... ix List of Tables........................................................................................................ xi About this document...........................................................................................xiii Who should use this document.................................................................................................................xiii Where to find more information................................................................................................................ xiii How to send your comments to IBM......................................................................xv If you have a technical problem.................................................................................................................xv Summary of changes...........................................................................................xvi -
Thread Scheduling in Multi-Core Operating Systems Redha Gouicem
Thread Scheduling in Multi-core Operating Systems Redha Gouicem To cite this version: Redha Gouicem. Thread Scheduling in Multi-core Operating Systems. Computer Science [cs]. Sor- bonne Université, 2020. English. tel-02977242 HAL Id: tel-02977242 https://hal.archives-ouvertes.fr/tel-02977242 Submitted on 24 Oct 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ph.D thesis in Computer Science Thread Scheduling in Multi-core Operating Systems How to Understand, Improve and Fix your Scheduler Redha GOUICEM Sorbonne Université Laboratoire d’Informatique de Paris 6 Inria Whisper Team PH.D.DEFENSE: 23 October 2020, Paris, France JURYMEMBERS: Mr. Pascal Felber, Full Professor, Université de Neuchâtel Reviewer Mr. Vivien Quéma, Full Professor, Grenoble INP (ENSIMAG) Reviewer Mr. Rachid Guerraoui, Full Professor, École Polytechnique Fédérale de Lausanne Examiner Ms. Karine Heydemann, Associate Professor, Sorbonne Université Examiner Mr. Etienne Rivière, Full Professor, University of Louvain Examiner Mr. Gilles Muller, Senior Research Scientist, Inria Advisor Mr. Julien Sopena, Associate Professor, Sorbonne Université Advisor ABSTRACT In this thesis, we address the problem of schedulers for multi-core architectures from several perspectives: design (simplicity and correct- ness), performance improvement and the development of application- specific schedulers. -
Embedded Systems Supporting by Different Operating Systems
A Survey: Embedded Systems Supporting By Different Operating Systems Qamar Jabeen, Fazlullah Khan, Muhammad Tahir, Shahzad Khan, Syed Roohullah Jan Department of Computer Science, Abdul Wali Khan University Mardan [email protected], [email protected] -------------------------------------------------------------------------------------------------------------------------------------- Abstract: In these days embedded systems used in industrial, commercial system have an important role in different areas. e.g Mobile Phones and different Fields and applications like Network type of Network Bridges are embedded embedded system , Real-time embedded used by telecommunication systems for systems which supports the mission- giving better requirements to their users. critical domains, mostly having the time We use digital cameras, MP3 players, DVD constraints, Stand-alone systems which players are the example of embedded includes the network router etc. A great consumer electronics. In our daily life its deployment in the processors made for provided us efficiency and flexibility and completing the demanding needs of the many features which includes microwave users. There is also a large-scale oven, washing machines dishwashers. deployment occurs in sensor networks for Embedded system are also used in providing the advance facilities, for medical, transportation and also used in handled such type of embedded systems wireless sensor network area respectively a specific operating system must provide. medical imaging, vital signs, automobile This paper presents some software electric vehicles and Wi-Fi modules. infrastructures that have the ability of supporting such types of embedded systems. 1. Introduction: Embedded system are computer systems designed for specific purpose, to increase functionality and reliability for achieving a specific task, like general Figure 1: Taxonomy of Embedded Software’s purpose computer system it does not use for multiple tasks. -
IBM Workload Automation: Glossary Scheduler
IBM Workload Automation IBM Glossary Version 9 Release 5 IBM Workload Automation IBM Glossary Version 9 Release 5 Note Before using this information and the product it supports, read the information in “Notices” on page 31. This edition applies to version 9, release 5, modification level 0 of IBM Workload Scheduler (program number 5698-WSH) and to all subsequent releases and modifications until otherwise indicated in new editions. © Copyright IBM Corporation 1999, 2016. © Copyright HCL Technologies Limited 2016, 2019 Glossary Use the glossary to find terms and definitions for the IBM Workload Automation products. The following cross-references are used: v See refers you from a term to a preferred synonym, or from an acronym or abbreviation to the defined full form. v See also refers you to a related or contrasting term. To view glossaries for other IBM products, go to www.ibm.com/software/ globalization/terminology. “A” “B” on page 3 “C” on page 4 “D” on page 6 “E” on page 9 “F” on page 11 “G” on page 12 “H” on page 13 “I” on page 13 “J” on page 14 “L” on page 16 “M” on page 17 “N” on page 18 “O” on page 19 “P” on page 20 “Q” on page 22 “R” on page 22 “S” on page 24 “T” on page 26“U” on page 27 “V” on page 28 “W” on page 28 “X” on page 29“Z” on page 30 A access method An executable file used by extended agents to connect to and control jobs on other operating systems (for example, z/OS®) and applications (for example, Oracle Applications, PeopleSoft, and SAP R/3). -
UNIX-Like Operating Systems
History OS UNIX UI UNIX-like Security Questions Operating Systems by Roman Szturc Simple, Low-Power Machines History user had sole use of the machine, OS program was loaded into the machine and the UNIX machine set to work, UI task is responsible for everything, Security Questions task totaly determines behavior of computer. machines came with libraries of support code which were linked to the user’s program to assist in operations such as input and output This would become the genesis of the modern-day operating system. More Powerful Computers History Later, more powerful computers appeared. They were OS characterized as follows: UNIX UI CPU is much faster than R/W operations, Security CPU is idle while R/W operation in progress, Questions CPU can perform other task while idle. Need to manage multiple tasks Task switching. Task scheduling. Operating System History OS An operating system (OS) is the system (low-level) UNIX UI software responsible for Security Questions direct control and management of hardware, task management, storage allocation, presentation of a default user interface. Program and Process process2 History OS data2 UNIX UI Security process1 Questions data1 PSfrag replacements program code memory Early Operating Systems History OS Early OS had some problems. The OS UNIX UI were very diverse — each OS specific to particular Security hardware, Questions used radically different models of commands and procedures, Typically, each time the manufacturer brought out a new machine, there would be a new OS. UNIX UNIX is an OS developed in the 1960s and 1970s by AT&T Bell Labs employees including K. -
Job Control Profile
1 Job Control Profile 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Document Number: DCIM1034 24 Document Type: Specification Document Status: Published 25 Document Language: E 26 Date: 2012-03-08 27 Version: 1.2.0 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 THIS PROFILE IS FOR INFORMATIONAL PURPOSES ONLY, AND MAY CONTAIN TYPOGRAPHICAL 52 ERRORS AND TECHNICAL INACCURACIES. THE CONTENT IS PROVIDED AS IS, WITHOUT 53 EXPRESS OR IMPLIED WARRANTIES OF ANY KIND. ABSENT A SEPARATE AGREEMENT 54 BETWEEN YOU AND DELL™ WITH REGARD TO FEEDBACK TO DELL ON THIS PROFILE 55 SPECIFICATION, YOU AGREE ANY FEEDBACK YOU PROVIDE TO DELL REGARDING THIS 56 PROFILE SPECIFICATION WILL BE OWNED AND CAN BE FREELY USED BY DELL. 57 58 © 2010 - 2012 Dell Inc. All rights reserved. Reproduction in any manner whatsoever without the express 59 written permission of Dell, Inc. is strictly forbidden. For more information, contact Dell. 60 61 Dell and the DELL logo are trademarks of Dell Inc. Microsoft and WinRM are either trademarks or 62 registered trademarks of Microsoft Corporation in the United States and/or other countries. Other 63 trademarks and trade names may be used in this document to refer to either the entities claiming the 64 marks and names or their products. Dell disclaims proprietary interest in the marks and names of others. 65 2 Version 1.2.0 66 CONTENTS 67 1 Scope ................................................................................................................................................... -
Programming Memory-Constrained Networked Embedded Systems
Swedish Institute of Computer Science Doctoral Thesis SICS Dissertation Series 47 Programming Memory-Constrained Networked Embedded Systems Adam Dunkels February 2007 Swedish Institute of Computer Science Stockholm, Sweden Copyright c Adam Dunkels, 2007 ISRN SICS-D–47–SE SICS Dissertation Series 47 ISSN 1101-1335 Printed by Arkitektkopia, V¨aster˚as, Sweden 3 Abstract Ten years after the Internet revolution are we standing on the brink of another revolution: networked embedded systems that connect the physical world with the computers, enabling new applications ranging from environmental moni- toring and wildlife tracking to improvements in health care and medicine. Only 2% of all microprocessors that are sold today are used in PCs; the re- maining 98% of all microprocessorsare used in embeddedsystems. The micro- processors used in embedded systems have much smaller amounts of memory than PC computers. An embedded system may have as little has a few hundred bytes of memory, which is thousands of millions times less than the memory in a modern PC. The memory constraints make programming embedded systems a challenge. This thesis focus on three topics pertaining to programming memory- constrained networked embedded systems: the use of the TCP/IP protocol suite even in memory-constrained networked embedded systems; simplifying event- driven programming of memory-constrained systems; and dynamic loading of program modules in an operating system for memory-constrained devices. I show that the TCP/IP protocol stack can, contrary to previous belief, be used in memory-constrainedembedded systems but that a small implementation has a lower network throughput. I present a novel programming mechanism called protothreads that is intended to replace state machine-based event-driven pro- grams. -
Unisys IBM Mainframe Security - Part 2
ProTech Professional Technical Services, Inc. Unisys IBM Mainframe Security - Part 2 Course Summary Description This course is intended for individuals who need an initial, introductory understanding of IBM's mainframe operating system z/OS and the mainframe security software product Resource Access Control Facility (RACF). It is specifically designed to give attendees a solid foundation in z/OS and RACF without overloading them with advanced technical topics, yet it also serves as the ideal springboard for acquiring Course Outline Course further skills and knowledge. Attendees will gain a fundamental understanding of the components and functions of z/OS and RACF. Objectives After taking this course, students will be able to understand: What z/OS is and what functions it performs The software components of z/OS How to use TSO and ISPF Coding and submitting batch jobs What RACF is and what functions it performs The contents of each type of RACF profile What groups are and how they are used Protecting datasets and general resources How RACF decides whether to grant access Topics Introduction to z/OS Groups Time Sharing Option (TSO) Resource Protection Batch Job Control Language (JCL) Datasets Introduction to RACF General Resources Users RACF Administration Audience This course is designed for anyone requiring general, introductory knowledge of z/OS and RACF. Including; Entry-level security administrators Compliance staff Non-mainframe IT security administrators IT Auditors IT Security Supervisors Prerequisites There are no prerequisites for this course. Duration Two days Due to the nature of this material, this document refers to numerous hardware and software products by their trade names. -
UTN FRD – Sistemas Operativos Clase I Basic Elements
UTN FRD – Sistemas Operativos Clase I Basic Elements • Processor – Two internal registers • Memory address resister (MAR) – Specifies the address for the next read or write • Memory buffer register (MBR) – Contains data written into memory or receives data read from memory Basic Elements • Processor – I/O address register – I/O buffer register Basic Elements • Main Memory – Volatile – Referred to as real memory or primary memory Basic Elements • I/O Modules – Secondary Memory Devices – Communications equipment – Terminals • System bus – Communication among processors, main memory, and I/O modules Computer Components: Top-Level View Computer Hardware Review Structure of a large Pentium system 7 Processor Registers • User-visible registers – Enable programmer to minimize main memory references by optimizing register use • Control and status registers – Used by processor to control operating of the processor – Used by privileged OS routines to control the execution of programs User-Visible Registers • May be referenced by machine language • Available to all programs – application programs and system programs User-Visible Registers • Data • Address – Index register: Adding an index to a base value to get the effective address – Segment pointer: When memory is divided into segments, memory is referenced by a segment and an offset – Stack pointer: Points to top of stack Control and Status Registers • Program counter (PC) – Contains the address of an instruction to be fetched • Instruction register (IR) – Contains the instruction most recently