raudone.info Introduction to the. New Mainframe z/OS Basics. Mike Ebbers. John Kettner. Wayne O'Brien. Bill Ogden. Basic mainframe concepts, including. Redbooks. Front cover. ABCs of .. zSeries mainframes and bit addressing. .. other IBM Redbooks publications in one of the following ways: Use the. raudone.info Front cover. System Programmer's. Guide to: Workload. Manager. Pierre Cassier. Annamaria Defendi. Dagmar Fischer. John Hutchinson.
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Reduce Risk and Improve Security on IBM Mainframes: Volume 1 The Interactive System Productivity Facility/Program Development Facility (ISPF/PDF) is a. Mainframe from Scratch: Hardware Configuration and z/OS Build. Scenario. raudone.info This IBM® Redbooks® publication provides students of information systems technology and skills necessary to begin using the basic facilities of a mainframe computer. Download PDF ( MB) · Download EPUB ( MB).
To avoid this, the application has to be developed Light weight model for server communication. This application makes synchronous and asynchronous calls. Database: An enterprise can choose between DB2 or IMS as their database based on their business requirements, both having their own advantages and disadvantages.
IMS is a hierarchical database in which information is structured in the form of records.
These records are further subdivided into a hierarchy of related segments. The meaning of hierarchical itself defines that there are levels of data and as we progress from level down, more and more information related to the general information at the top level is given. DB2 is a relational database management system and is used to run on multiple virtual storage mainframe platforms and allows to create, store, update and retrieve data in systematic manner.
It is mainly used to shift from the prevalent hierarchical database to new relational model. It can serve to a number of difference operating system platforms.
DB2 was initially designed to work on mainframes however today it can be used in various platforms like UNIX, windows and linux along with others. DB2 presents the logical and structured view of data due to which user need not to worry how the data will physically store. It also provides the layer of Independence due to which when the structure of data changes there is no need to re-write whole COBOL program again.
Revitalisierung der akademischen Großrechnerausbildung
DB2 optimizes the queries internally whereas IMS developers makes access path to data. However, this additional requirement of CPU make the DB2 more beneficial because it leads to enormous benefit of database optimization and ad hoc query support is also better.
The android application should have necessary Internet access permission, as remote procedure calls are only possible through Internet. REST Representational State Transfer : With this the services can be interacted via stateless representations of the targets of the service.
It uses the security of the transport layer that was implemented to support world-wide web. JSON is derived from java script language which is used to represent simple data structures and associative arrays, called objects.
It is a well-known technology that has been used effectively in SOA framework. This makes SOAP as a single solution for various interconnectivity problems. So to make a connection of Android with mainframe, a Java servlet is required. This servlet can make both rest and soap based calls, so when servlet takes a REST based input it further makes a soap based call to mainframe which leads to transfer of data between android and mainframe.
The servlet is deployed on Web Server. Distributed Connectivity of Mobile Apps with Mainframe Apps 5 On the basis of requirement the user can make synchronous or asynchronous calls.
If user is sending some data and needs an immediate response then it is required for user to make synchronous calls. However, if user wants to send or receive large files like in uploading and downloading of images or music files then it is required to make asynchronous calls.
The reason to make asynchronous calls is to avoid closing the data connection when receiving heavy data files, as the Android Application force closes the application if the OS will not receive response from the main thread of the application within 6 seconds. Synchronous Calls Here a 3-tier model is used for developing android application.
In which the first layer is UI User-Interface layer and is designed in normal android platform, the interlaying layer which is a controlling and interfacing layer is programmed in JAVA which will take the inputs from the android app and format the inputs so that data can be sent to mainframe, which then invokes the web-service and after receiving response from the web-service and sends the result in Android compatible format to Android application.
Model: The model represents data or data container. The mainframe application will get data from database DB2 based on the input received and send a response back.
This mainframe application is exposed as CICS web service for sending text format data.
View: The View is the portion of the application responsible for the display. The android app is the view of this architecture. This is where the input to the model and the response comes from the model is displayed to the user.
Yes, it will take some time from your important duties to read the book, but the back-end payoff of better applications, better operational decisions, etc. And technically knowledgeable employees are what every business requires.
Think of this Redbook as a training session. Sure, you or your team could attend classes to learn similar information, but this Redbook is available now for free. Yes, there are areas in the Redbook where experienced personnel can and perhaps should skip over a topic.
Just be careful, however, because skipping over a topic may mean missing something important. Often, we think we know a topic well, when in fact we know it well only from one point of view. Even seasoned pros need to review the basics from time to time.
Recommendation 3: The information contained in this Redbook will help them understand the robustness of the environment and its importance in the business world.
No, but it will give him or her necessary information to help make intelligent and well-informed decisions.
One Architecture Fits All – IBM Mainframe
The authors and contributors to this Redbook have done an excellent job.IMS is a hierarchical database in which information is structured in the form of records. These records are further subdivided into a hierarchy of related segments. A binary executable code can also be stored as BLOB.
Once the sub-thread finishes the transmission it will notify the main thread about the status of the transmission, upon which main-thread will work. It is mainly used to shift from the prevalent hierarchical database to new relational model. So to make a connection of Android with mainframe, a Java servlet is required. WLM goal management Chapter 4.
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