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- Key_Sequenced_Data_Set abstract "A Key Sequenced Data Set (KSDS) is a type of data set used by the IBM VSAM computer data storage system. Each record in a KSDS data file is embedded with a unique key. A KSDS consists of two parts, the data component and a separate index file known as the index component which allows the system to physically locate the record in the data file by its key value. Together, the data and index components are called a cluster.Records can be accessed randomly or in sequence and can be variable-length.As a VSAM data set, the KSDS data and index components consist of control intervals which are further organized in control areas. As records are added at random to a KSDS, control intervals fill and need to be split into two new control intervals, each new control interval receiving roughly half of the records. Similarly, as the control intervals in a control area are used up, a control area will be split into two new control areas, each new control area receiving roughly half the control intervals.While a basic KSDS only has one key (the primary key), alternate indices may be defined to permit the use of additional fields as secondary keys. An alternate index is itself a KSDS.".
- Key_Sequenced_Data_Set wikiPageExternalLink d002303.htm.
- Key_Sequenced_Data_Set wikiPageExternalLink wwhelp.htm.
- Key_Sequenced_Data_Set wikiPageID "2201563".
- Key_Sequenced_Data_Set wikiPageRevisionID "544058919".
- Key_Sequenced_Data_Set hasPhotoCollection Key_Sequenced_Data_Set.
- Key_Sequenced_Data_Set subject Category:Computer_file_systems.
- Key_Sequenced_Data_Set type Abstraction100002137.
- Key_Sequenced_Data_Set type Arrangement105726596.
- Key_Sequenced_Data_Set type ClassificationSystem105727220.
- Key_Sequenced_Data_Set type Cognition100023271.
- Key_Sequenced_Data_Set type ComputerFileSystems.
- Key_Sequenced_Data_Set type FileSystem105732614.
- Key_Sequenced_Data_Set type PsychologicalFeature100023100.
- Key_Sequenced_Data_Set type Structure105726345.
- Key_Sequenced_Data_Set comment "A Key Sequenced Data Set (KSDS) is a type of data set used by the IBM VSAM computer data storage system. Each record in a KSDS data file is embedded with a unique key. A KSDS consists of two parts, the data component and a separate index file known as the index component which allows the system to physically locate the record in the data file by its key value.".
- Key_Sequenced_Data_Set label "Key Sequenced Data Set".
- Key_Sequenced_Data_Set label "Key Sequenced Data Set".
- Key_Sequenced_Data_Set label "Key Sequenced Data Set".
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- Key_Sequenced_Data_Set sameAs Q3219655.
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- Key_Sequenced_Data_Set sameAs Key_Sequenced_Data_Set.
- Key_Sequenced_Data_Set wasDerivedFrom Key_Sequenced_Data_Set?oldid=544058919.
- Key_Sequenced_Data_Set isPrimaryTopicOf Key_Sequenced_Data_Set.