In a client/server architecture, multiple computers typically cooperate to do the same task. For example, in Figure 1.1 the application uses a Web server, a database server, and an LDAP server.
On a mainframe, the same computer does everything. One security package (RACF, in most cases) protects one operating system kernel. Mainframe subsystems do everything else, as you can see in Figure 1.2.
That's a little of the "why" of mainframes. Now let's get started with the "how."
Showing posts with label Mainframes. Show all posts
Showing posts with label Mainframes. Show all posts
IBM mainframes COBOL qsam/vsam FILE STATUS CODES
Hi Friends
IBM mainframes COBOL qsam/vsam FILE STATUS CODES are available .Please check the Link for the latest codes and File Status
http://publib.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/igy3lr00/6.1.8.9.1?SHELF=igy3sh00&DT=20011206182158#HDRSTATKEY
IBM mainframes COBOL qsam/vsam FILE STATUS CODES are available .Please check the Link for the latest codes and File Status
http://publib.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/igy3lr00/6.1.8.9.1?SHELF=igy3sh00&DT=20011206182158#HDRSTATKEY
How to Convert IBM As400 Spool Files to Word or Excel
1.Perform your mainframe database query as Normally.
2.Generate your spool file . When saving the file, use the CPYTOIMPF command to get the output as a comma separated value file (Extension of *.csv).
3.Open MS Word or MS Excel.
4.Open the .csv file in Excel or Word.
5. Click “Yes” on the “Convert To Table” dialog box. This will separate all the values in the spool file separated by commas into their own cells in Excel, or into their own table cells in MS Word.
2.Generate your spool file . When saving the file, use the CPYTOIMPF command to get the output as a comma separated value file (Extension of *.csv).
3.Open MS Word or MS Excel.
4.Open the .csv file in Excel or Word.
5. Click “Yes” on the “Convert To Table” dialog box. This will separate all the values in the spool file separated by commas into their own cells in Excel, or into their own table cells in MS Word.
History of the IBM Mainframes Computer
Mainframes are powerful computers used mainly by large organizations for critical applications, typically bulk data processing such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing.
A mainframe is a continually evolving general purpose computing platform incorporating in it architectural definition the essential functionality required by its target applications."
Some additional comments about this definition are in order. One of the most fundamental features of the mainframe world is the rapid and apparently endless evolution of the product line. From 16 general and 4 floating point registers of System/360, to the control register additions in the early 370s, to the access registers of the latter 370s, to the full complement of floating point registers of System/390 and the full 64 bit implementation offered by the z800/900 models; from 6 selector channels to 16 block multiplexing channels to 256 high speed optical channels; from 142 instructions to over 500 instructions; from real addressing to virtual addressing to virtual machines; from the simple 8 bit memory of the 360/30 through generations of development to the multiported, multilevel caching, multiprocessor supporting memory of the z900, the entire hardware domain of the mainframe world has been characterized by an unmatched, and indeed accelerating, evolution.
Mainframes used to be defined by their size, and they can still fill a room, cost millions, and support thousands of users. But now a mainframe can also run on a laptop and support two users. So today's mainframes are best defined by their operating systems: Unix and Linux, and IBM's z/OS, OS/390, MVS, VM, and VSE. Mainframes combine four important features: 1) Reliable single-thread performance, which is essential for reasonable operations against a database. 2) Maximum I/O connectivity, which means mainframes excel at providing for huge disk farms. 3) Maximum I/O bandwidth, so connections between drives and processors have few choke-points. 4) Reliability--mainframes often allow for "graceful degradation" and service while the system is running.
A mainframe is a continually evolving general purpose computing platform incorporating in it architectural definition the essential functionality required by its target applications."
Some additional comments about this definition are in order. One of the most fundamental features of the mainframe world is the rapid and apparently endless evolution of the product line. From 16 general and 4 floating point registers of System/360, to the control register additions in the early 370s, to the access registers of the latter 370s, to the full complement of floating point registers of System/390 and the full 64 bit implementation offered by the z800/900 models; from 6 selector channels to 16 block multiplexing channels to 256 high speed optical channels; from 142 instructions to over 500 instructions; from real addressing to virtual addressing to virtual machines; from the simple 8 bit memory of the 360/30 through generations of development to the multiported, multilevel caching, multiprocessor supporting memory of the z900, the entire hardware domain of the mainframe world has been characterized by an unmatched, and indeed accelerating, evolution.
Mainframes used to be defined by their size, and they can still fill a room, cost millions, and support thousands of users. But now a mainframe can also run on a laptop and support two users. So today's mainframes are best defined by their operating systems: Unix and Linux, and IBM's z/OS, OS/390, MVS, VM, and VSE. Mainframes combine four important features: 1) Reliable single-thread performance, which is essential for reasonable operations against a database. 2) Maximum I/O connectivity, which means mainframes excel at providing for huge disk farms. 3) Maximum I/O bandwidth, so connections between drives and processors have few choke-points. 4) Reliability--mainframes often allow for "graceful degradation" and service while the system is running.
IBM- DB2 for Linux, UNIX and Windows Features and Benefits
Did you know that DB2 can also lower your overall cost of managing data? Here are just some of the many ways
Autonomics
Reliability
Security
Performance
Comprehensive Tools
Virtualiztaion
Autonomics
Reliability
Security
Performance
Comprehensive Tools
Virtualiztaion
What are different types of process in jcl?
The Different Types of Process in JCL are
1. premap process
2. response process
1. premap process
2. response process
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