the device and load parameters used to initially IPL the system. DB2 and VSAM features IBM DB2 DB2 , VSAM , and other data storage formats achieve greater I O performance thanks to a new System z9 ... more details
. Names of those files are organized in catalogs that are VSAM files themselves. The native encoding ... s virtual memory operating systems introduced a new file management component, VSAM , which provided ... the index. These VSAM formats became the basis of IBM s database management systems , IBM Information .... VSAM also included a catalog component used for MVS master catalog. Partitioned datasets ... more details
about mainframe computer file a general meaning in computing field Data set Unreferenced date December 2009 data set archaic , dataset preferred , is a computer file having a record oriented file record organization . The term pertains to the IBM mainframe computer mainframe operating system line, starting with OS 360 , and is still used by its successors, including the current z OS . Those systems historically preferred this term over a file . A dataset is typically stored on direct access storage device DASD or magnetic tape , however unit record devices are also supported. Datasets are not unstructured streams of byte s, but rather are organized in various logical record and block structures determined by the code DSORG code data set organization , code RECFM code record format , and other parameters. These parameters are specified at the time of the data set allocation creation , for example with the Job Control Language code DD code statements. Inside a job they are stored in the Data Control Block DCB , which is a data structure used to access datasets, for example using access method s. Dataset organization Mainframe I O access methods For OS 360, the DCB s DSORG parameter specifies how the dataset is organized. It may be physically sequential PS , indexed sequential IS , partitioned PO , or Direct Access DA . Datasets on tape may only be DSORG PS. The choice of organization depends on how the data is to be accessed, and in particular, how it is to be updated. Programmers utilize various access method s such as Queued Sequential Access Method QSAM or VSAM in programs for reading and writing data sets. Access method depends on the given data set organization. Record format RECFM Regardless of organization, the physical structure of each record is essentially the same, and is uniform throughout the dataset. This is specified in the DCB code RECFM code parameter. code RECFM F code means that the records are of fixed length, specified via the code LRECL code para ... more details
sets 2 System Utilities to maintain and manage catalogs 3 Access Method Services to process VSAM Virtual storage access method and non VSAM data sets. See also dd Unix , Unix program inspired by DD IBM ... more details
Inline date November 2011 Original Research date December 2011 Extract, transform and load ETL is a process in database usage and especially in data warehouse data warehousing that involves data extraction Extracting data from outside sources data transformation Transforming it to fit operational needs which can include quality levels Loading it into the end target database or data warehouse Extract The first part of an ETL process involves extracting the data from the source systems. In many cases this is the most challenging aspect of ETL, as extracting data correctly will set the stage for how subsequent processes will go. File ETL Architecture Pattern.jpg thumb 320px ETL Architecture Pattern Most data warehousing projects consolidate data from different source systems. Each separate system may also use a different data organization data format format . Common data source formats are relational database s and Flat file database flat file s, but may include non relational database structures such as Information Management System Information Management System IMS or other data structures such as VSAM Virtual Storage Access Method VSAM or ISAM Indexed Sequential Access Method ISAM , or even fetching from outside sources such as through web spider ing or screen scraping . The streaming of the extracted data source and load on the fly to the destination database is another way of performing ETL when no intermediate data storage is required. In general, the goal of the extraction phase is to convert the data into a single format which is appropriate for transformation processing. An intrinsic part of the extraction involves the parsing of extracted data, resulting in a check if the data meets an expected pattern or structure. If not, the data may be rejected entirely or in part. Transform The transform stage applies a series of rules or functions to the extracted data from the source to derive the data for loading into the end target. Some data sources will require ver ... more details
Nomad Software is a relational database and fourth generation language 4GL , originally developed in the 70s by time sharing vendor National CSS National CSS, Inc. While it is still in use today, its widest use was in the 70s and 80s. Nomad provides both interactive and batch environments for data management and application development, including commands for database definition, data manipulation, and reporting. All components are accessible by and integrated through a database oriented programming language. Unlike many tools for managing mainframe data , which are geared to the needs of professional programmers in MIS departments, Nomad is particularly designed for and sold to application end users in large corporations. End users employ Nomad in batch production cycles and in Web enabled applications, as well as for reporting and distribution via the Web or PC desktop. Capabilities Nomad is distinguished by five characteristics An intuitive database oriented Fourth generation programming language 4GL for creating databases, managing data, and writing applications An interactive environment in which any Fourth generation programming language 4GL statement may be typed and immediately processed comparable to interactive tools like PHP or Perl Relational database features, supporting lookup tables and the other elements of a database normalization normalized relational database Powerful set at a time operations under the control of simple imperative commands Accesses data from many sources, such as VSAM , IBM Information Management System IMS , IDMS , IBM DB2 DB2 , Oracle Database Oracle , and SQL Server dn date December 2011 Nomad s language was designed to simplify the application development process, especially for reporting applications. Where possible, common requirements were addressed by intuitive nonprocedural syntax elements, to avoid traditional programming. The heart of the system was the LIST command, which created report output. blockquote pre LIST BY S ... more details
Image TelonLogo.jpg 250px thumb right Original TELON logo, showing the eight concentric circles representing an octave. Courtesy Don Christensen TELON , later renamed CA TELON , is one of the first commercially successful application generator s for building business applications. Overview TELON is an application development system currently sold and maintained by CA, Inc. When it was introduced in 1981 it was one of the first Computer aided software engineering CASE tools on the commercial market. The developer tools run on IBM s MVS operating systems using TSO and PCs running MS Windows and the target environments include Information Management System IMS and CICS transaction processing systems. TELON supported multiple database technologies, including IBM s VSAM , IMS DB , IBM DB2 DB2 , and Cullinet Cullinet s IDMS . TELON is an application code generator which uses macros to generate COBOL , COBOL II , or PL I code that can run natively on the target environment without run time proprietary code. Developers create screen designs in the TELON Design Facility TDF and define attributes for the screen. The design can then be run through a prototyper to test screen flow. Next, macros generate the code using the information created by the TDF. Lastly, the TELON Test Facility is used, in conjunction with code debuggers, to search for and fix bugs before the application is moved into production. History Early stages TELON was originally conceived and designed by Chris McNeil and Don Christensen in the late 1970s when McNeil was a software engineer at Liberty Mutual Insurance Company and Christensen was an IBM Systems Engineer contracting with Liberty Mutual . During their tenure, Liberty Mutual installed an IBM 3790 minicomputer along with a claims processing system CAPS created by Insurance Systems of America. Christensen worked with McNeil on a project that customized the package for use at Liberty Mutual. This customization, which involved IBM s cumbersome Macro lang ... more details
This is a list of computing and IT acronyms and abbreviations . AlphanumericTOC align center 0 9 div col 3 Slashdot . Slashdot First generation programming language 1GL First Generation Programming Language 1NF First Normal Form 10BASE2 10B2 10BASE 2 10BASE5 10B5 10BASE 5 10BASE F 10B F 10BASE F 10BASE FB 10B FB 10BASE FB 10BASE FL 10B FL 10BASE FL 10B FP 10BASE FP 10BASE T 10B T 10BASE T 100BASE FX 100B FX 100BASE FX 100BASE T 100B T 100BASE T 100BASE TX 100B TX 100BASE TX 100BaseVG 100BVG 100BASE VG Intel 80286 286 Intel 80286 processor 2B1Q 2 Binary 1 Quaternary Second generation programming language 2GL Second Generation Programming Language 2NF Second Normal Form Third generation programming language 3GL Third Generation Programming Language 3NF Third Normal Form Intel 80386 386 Intel 80386 processor Intel i486 486 Intel 80486 processor 4B5B 4B5BLF 4 Byte 5 Byte Local Fiber Fourth generation programming language 4GL Fourth Generation Programming Language 4NF Fourth Normal Form Fifth generation programming language 5GL Fifth Generation Programming Language 5NF Fifth Normal Form 6NF Sixth Normal Form 8b 10b encoding 8B10BLF 8 Byte 10 Byte Local Fiber div col end A div col 3 Access time AAT Average Access Time Anti aliasing AA Anti Aliasing AAA protocol AAA Authentication Authorization, Accounting Minimum bounding box AABB Axis Aligned Bounding Box Advanced Audio Coding AAC Advanced Audio Coding ATM adaptation layer AAL ATM Adaptation Layer ATM adaptation layer AALC ATM Adaptation Layer Connection AppleTalk AARP AppleTalk Address Resolution Protocol Actor Based Concurrent Language ABCL Actor Based Concurrent Language Application binary interface ABI Application Binary Interface Asynchronous Balanced Mode ABM Asynchronous Balanced Mode Area Border Router ABR Area Border Router Automatic baud rate detection ABR Auto Baud Rate detection Available Bit Rate ABR Available Bitrate Average bitrate ABR Average Bitrate Acoustic coupler AC Acoustic Coupler Alternating curren ... more details
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