ADABAS
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'Adabas' is Software AG’s advanced database management system.
First released in 1970, Adabas is considered by some to have been one of the earliest commercially available database products. Initially released on IBM mainframe systems, Adabas is now available on a range of other systems including OpenVMS, Unix (including Linux and Linux on zSeries) and Windows servers.
Adabas has maintained its position as one of the world's fastest OLTP databases, offering 24x7 functioning, Parallel Sysplex support, real-time replication capability, SQL and XML access and other leading edge capabilities. Historically, Adabas was used in conjunction with Software AG's programming language NATURAL, so that many legacy applications that use Adabas as a database on the back-end are also developed with NATURAL as well.
Adabas is an inverted list database. It has been described as "Non-relational" but “Relational Like" in its characeristics. Some differences:
★ Files, not Tables as the major organizational unit
★ Records, not Rows as content unit within the organizational unit
★ Fields, not Columns as components of a content unit
★ No embedded SQL engine, an external query mechanism must be provided
★ A Dirty Read (see Write-Read conflict) is the mode of operation
★ Supports “embedded Tablesâ€, ie OCCURS via nested files
It has proven to be very successful in providing efficient access to data and maintaining the integrity of the database. Adabas is now widely used in applications that require very high volumes of data processing or in high transaction online analytical processing environments.
★ Adabas product home page
★ Adabas and Natural Developer Community
| Contents |
| History |
| Technical information |
| External links |
History
First released in 1970, Adabas is considered by some to have been one of the earliest commercially available database products. Initially released on IBM mainframe systems, Adabas is now available on a range of other systems including OpenVMS, Unix (including Linux and Linux on zSeries) and Windows servers.
Adabas has maintained its position as one of the world's fastest OLTP databases, offering 24x7 functioning, Parallel Sysplex support, real-time replication capability, SQL and XML access and other leading edge capabilities. Historically, Adabas was used in conjunction with Software AG's programming language NATURAL, so that many legacy applications that use Adabas as a database on the back-end are also developed with NATURAL as well.
Technical information
Adabas is an inverted list database. It has been described as "Non-relational" but “Relational Like" in its characeristics. Some differences:
★ Files, not Tables as the major organizational unit
★ Records, not Rows as content unit within the organizational unit
★ Fields, not Columns as components of a content unit
★ No embedded SQL engine, an external query mechanism must be provided
★ A Dirty Read (see Write-Read conflict) is the mode of operation
★ Supports “embedded Tablesâ€, ie OCCURS via nested files
It has proven to be very successful in providing efficient access to data and maintaining the integrity of the database. Adabas is now widely used in applications that require very high volumes of data processing or in high transaction online analytical processing environments.
External links
★ Adabas product home page
★ Adabas and Natural Developer Community
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