Basic introduction Chinese name: IBM mainframe brand: IBM definition: large computer system system: iSeries definition, training, development course, 1964, 1968, 1972, 1976,1988,660. 1995, 1998, 1999, 2000, 2003, 2004, 2006, 20 10 July, superior, define the word host, initially. Although this word has been used in different ways for many years, most of the time it refers to a series of IBM computers starting with system/360. The term can also be used to refer to compatible systems produced by other manufacturers, such as Amdahl and Hitachi Data Systems (HDS). Some people use this word to refer to IBM's AS/400 or iSeries system, which is inappropriate. Because even IBM itself only regards these series of machines as medium-sized servers, not mainframes. Mainframe, as the top product in computer, is used in finance, securities and other industries because of its security (no hacker can attack at present) and high reliability (it is said that the downtime is less than 5 minutes all year round). IBM Mainframe is not only a hardware concept, it is an organic whole of hardware and proprietary software, and it is an inseparable closed system. Like IBM's As/400 minicomputer series, mainframes also use special software specially tailored for them. This closed system not only brings high reliability and security to the host system, but also makes it difficult for ordinary computer practitioners to enter this field. On the one hand, there is no perfect social host system training in developed countries including the United States, which is in sharp contrast with the training of open development platforms such as JAVA. Mainframe is a computer system developed in 1960s. After 40 years of continuous updating, its stability and security are second to none in all computer systems. It is precisely because of this advantage and powerful data processing ability that no other system can replace it so far. Because of the huge cost, the mainframe system is mainly used by * * *, banks, insurance companies and large manufacturing enterprises, because these institutions have high requirements for information security and stability. From the success of the Apollo moon landing program in the United States, to the development of weather forecasting and military science, as well as the transformation of the global financial industry and manufacturing business model, mainframes are inseparable. In the banking industry, hundreds of millions of personal savings account management and rich financial products now rely on mainframes; In the securities industry, it is unthinkable to leave the mainframe and paperless trading. At present, the core business platforms and data processing centers of the four major commercial banks in China, from the central bank to the workers' and peasants' construction, are built all over the country, and the product use and equipment maintenance are all owned by IBM 100%. Some people even think that IBM's monopoly on bank mainframes has caused a black hole in China's financial security. Training IBM mainframe engineers is a high-end talent. It is difficult for ordinary people to engage in this industry, but the salary is quite high, especially in Shanghai and Beijing. Mainframe is expensive, its security, stability and powerful data processing ability are irreplaceable at present, and it will not be easily eliminated in decades. Therefore, the professional stability of mainframe talents is very high, and the salary of experienced mainframe IT engineers is also very considerable. The annual salary is more than 200,000 yuan, which is much higher than that of engineers with the same qualifications engaged in open platform business. However, at present, there is a shortage of host talents in China, and it is difficult for colleges and universities to offer related courses because of the high host price and strong technical professionalism. Introduction to IBM mainframe courses 1 and OS/390An describe the basic concepts of OS/390, introduce the advantages of OS/390, and explain the concepts of system management, storage management, data management, task management, input and output process and communication system under OS/390. This course is a theoretical introduction, so that everyone can have a basic understanding of the internal implementation of mainframe. 2. The course "ISPF/PDF with TSO/E" introduces how to log in to the S/390 development environment with a simulation terminal and the basic skills of working in this environment, including: learning the method of starting TSO, switching between ISPF/PDF screens and how to use various functions, how to use ISPF/PDF to distribute and edit data sets, and how to establish and manage data sets. 3. COBOL (Common Business Oriented Language), the coding base of 3.COBOL for MVS, is a common language in the host development process. It is not only an ideal language for business data processing, but also widely used in data management. This course mainly introduces the characteristics, program structure, COBOL grammar, system compilation, linking, testing and debugging of COBOL language. 4、OS/390 MVS JCL & amp； Advanced this course teaches how to use MVS Job Control Language (JCL) and utilities in batch processing environment. Including: using proper grammar and programming rules to write basic JCL statements, introducing the use of JCL, In-Stream and Catalog processes under the storage management subsystem, the use of symbolic parameters in the process, the call of the process and the modification of parameters. 5. Introduction to CICS Transaction Server for OS/390 This course provides the basic concepts and definitions of its main functions, how to write and debug CICS command-level applications, and how to use the advanced functions of CICS to develop applications. Include the basic requirements of OLTP, how to develop applications in CICS environment, how to write CICS commands, how to compile, connect, debug and run applications, how to view online information and how to use interactive debugging tools. 6.SDFII for MVS teaches how to use SDFII tools to edit the application interface in MVS environment, and generate corresponding character images and physical images, and introduces how to apply the generated images to CICS programs. 7.VSAM Fundamentals This course introduces the access method, file structure and management of VSAM data sets, how to manage VSAM data sets with access method service program IDCAMS, and how to access and maintain data in VSAM data sets with COBOL program. 8. Application design of DB2 introduces the basic concepts and SQL statements of DB2, focusing on the application design and database management of DB2 on OS/390, and how to embed SQL language in COBOL program to access and maintain DB2 data. Development course On April 7th, 64, the first IBM mainframe (SYSTEM/360, referred to as S/360) was born. This $5 billion investment has proved to be a historic change in starting innovative business operations. 1964 S/360 was born. S/360 means a 360-degree circle, which is designed to meet the needs of every user. It allows low-end computers to connect to a host, download and download programs or data, and connect to the "loose terminal" of electronic data processing. It can be called the founder of modern information education. The model 1968 System/360 85 introduces cache, which makes the speed of providing high-priority data increase by 12 times than before, and lays the foundation for the same cache seen in many computing technologies today. IBM announces virtual machine virtualization. Today, zVM helps create agile hosts that can use resources quickly and effectively to respond to dynamic demands. The SAS software on 1976 System/370 helps to create a new competitive advantage: business intelligence. This innovation transforms raw data into operational intelligence, which can help organizations develop more profitable customer relationships and supplier relationships and achieve better and more accurate decision-making. 1988, IBM customers began to deploy DB2 outside the decision support system (DSS) and deployed it to the core transaction processing, which promoted the reduction of CPU cost and the remarkable improvement of concurrency. IBM introduced the enterprise system /3090 600S model. It is the most powerful general-purpose processor in the industry, providing customers with an additional 56% processing power, and booting new 10 S series advanced large computers, which utilize IBM's enterprise system architecture /370, multi-virtual system /ESA and virtual machine/extended architecture operating system and data management software. 1994 IBM announced the System/390 parallel system composite product, which includes coupler, S/390 parallel transaction server, high-speed coupling link and software function enhancement. The parallel system consortium aims to provide continuous availability of applications, reduce or eliminate planned applications, and can be extended to almost unlimited capacity. 1995, CMOS-supported processors were introduced into the host environment, which made a new roadmap for modern host technology. CMOS chips need less energy than chips using only one transistor. 1998 IBM introduced the 5th generation server of System/390. Turbo model broke through the 1 000 MIPS barrier and became one of the most powerful hosts in the world. 1999 IBM launches the 6th generation server of System/390. This is the first enterprise server using IBM's innovative copper chip technology. In 2000, IBM announced the IBM eServer z Series 900, which is the first IBM mainframe with e-commerce as its main function from scratch. Z-series hosts are designed to handle unpredictable e-commerce needs, enabling thousands of servers to run in the same chassis. IBM also introduced a new 64-bit operating system to z/OS. In 2003, IBM announced the eServer z series 990, which is the most complex server in the world and the new flagship product of the eServer series. It provides a balanced and highly secure platform for dynamically balancing key applications. It is the result of four years' investment and more than $654.38 billion. The number of SSL transactions per second on the z990 running z/OS 1.4 increased to 1 1, 000. In 2004, IBM released the new IBM eServer z series 890. EServer z890 provides some new options to better manage software costs and design innovative technologies to provide a simplified and more responsive infrastructure. Z890 maintained the tradition that SYSTEM/360 can accommodate every user's needs, and provided the first IBM mainframe (System/360, referred to as S/360) for medium-sized enterprises on April 7, 1964. This $5 billion investment has proved to be a historic change in starting innovative business operations. In 2006, IBM officially launched the breakthrough IBM System z9 business-class mainframe for mid-range users. In addition, IBM also announced the addition of new functions of the System Z9 Enterprise Server (IBM System Z9 109) to enhance the business flexibility of the system. In 2008, IBM announced the launch of System z 10 mainframe to help customers build a brand-new enterprise data center. Through the new design, the system z 10 greatly improves the efficiency of the data center by significantly improving performance, reducing power consumption and cooling costs, and occupying space requirements. At the same time, IT provides unparalleled security and responds to changing business needs through automated management and automatic tracking of IT resources. IBM System z 10 enterprise server (z 10 EC cabinet) is a world-class enterprise server specially designed for enterprise business requirements. Z 10 EC provides brand-new performance and capability for enterprise development and large-scale integration, realizes higher IT security, flexibility and availability, and reduces IT risks. At the same time, it introduces real-time resource allocation to respond to changing business requirements. 20 10 July, IBM announced the launch of zEnterprise mainframe server and a newly designed system, which can allow the workloads on mainframe, POWER7 and System x server to share resources and manage them as a single virtual system. The brand-new mainframe is also by far the most powerful and energy-saving mainframe. Advantages The performance advantages of mainframes, such as availability, scalability, security, partition and load capacity, are beyond the reach of other types of servers. Mainframe's super ability to handle complex multi-tasks makes the downtime much lower than other types of servers. Mainframe has strong I/O ability and is good at accessing very large databases; Dynamic partition management is adopted to allocate system resources flexibly according to the size of different application loads; The design strategy of preventing intrusion from the bottom layer improves the security of the host. The above characteristics are irreplaceable for the applications in the industries such as finance, telecommunications, transportation, energy, and * * * that require extremely strict system processing capacity and security and stability.