Object access method (OAM) is an access method under z/OS which is designed for the storage of large numbers of large files, such as images. It has a number of distinguishing features, e.g. compared to VSAM:
* OAM datasets do not have an internal record structure; they are accessed as binary data streams.
* OAM datasets are not directly cataloged. Rather, they are stored into OAM collections, with only the OAM collection being cataloged. The reason for this is to prevent the catalog from being overloaded with large numbers of (e.g. image) files.
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| - Object access method (de)
- Object access method (en)
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| - Object access method ist eine Zugriffsart in z/OS, die entwickelt wurde, um eine große Anzahl von Dateien (max. 256 MB), wie z. B. medizinische Bilder, zu speichern. OAM ist optionaler Bestandteil von DFSMS. Unterschiede zu VSAM sind z. B:
* OAM-Datasets haben keine feste Satzstruktur; reine byte streams.
* OAM-Dataset werden nicht direkt katalogisiert, sondern werden in OAM-Sammlungen gespeichert, welche wiederum katalogisiert werden. Dadurch soll die Anzahl der Einträge im Katalog klein gehalten und ein Überlauf des Katalogs verhindert werden. OAM kann in Verbindung mit DB2 verwendet werden. (de)
- Object access method (OAM) is an access method under z/OS which is designed for the storage of large numbers of large files, such as images. It has a number of distinguishing features, e.g. compared to VSAM:
* OAM datasets do not have an internal record structure; they are accessed as binary data streams.
* OAM datasets are not directly cataloged. Rather, they are stored into OAM collections, with only the OAM collection being cataloged. The reason for this is to prevent the catalog from being overloaded with large numbers of (e.g. image) files. (en)
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| - Object access method ist eine Zugriffsart in z/OS, die entwickelt wurde, um eine große Anzahl von Dateien (max. 256 MB), wie z. B. medizinische Bilder, zu speichern. OAM ist optionaler Bestandteil von DFSMS. Unterschiede zu VSAM sind z. B:
* OAM-Datasets haben keine feste Satzstruktur; reine byte streams.
* OAM-Dataset werden nicht direkt katalogisiert, sondern werden in OAM-Sammlungen gespeichert, welche wiederum katalogisiert werden. Dadurch soll die Anzahl der Einträge im Katalog klein gehalten und ein Überlauf des Katalogs verhindert werden. OAM kann in Verbindung mit DB2 verwendet werden. (de)
- Object access method (OAM) is an access method under z/OS which is designed for the storage of large numbers of large files, such as images. It has a number of distinguishing features, e.g. compared to VSAM:
* OAM datasets do not have an internal record structure; they are accessed as binary data streams.
* OAM datasets are not directly cataloged. Rather, they are stored into OAM collections, with only the OAM collection being cataloged. The reason for this is to prevent the catalog from being overloaded with large numbers of (e.g. image) files. OAM is used in conjunction with IBM Db2. An example use case for OAM would be storing medical images in a Db2 database running under z/OS. (en)
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