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The Object Access Method (OAM) is a file storage system used only with z/OS®. It can hold up to 2GB of data and catalogs the entire set of files as a unit, reducing memory usage. OAM turns each file into a stream, making it easier to access.
The Object Access Method (OAM) is used to help people access files in the operating system (OS) through certain command line codes. Unlike other access methods designed for general-purpose systems, the object access method is only suited to work with z/OS®, a barebones system used primarily by lawyers and retail stores. OAM was created specifically to help with file storage and can typically hold up to 2 gigabytes (GB) of data. Files are traditionally in digital catalogs, but the entire set of files is cataloged with OAM. Another difference between OAM and other access methods is that all files are logged as a stream.
There are many login methods used with a range of different operating systems and some are generic which means they can be used with several different operating systems at the same time. With the object access method, this can only be used with z/OS®. This is a 64-bit mainframe operating system that is not graphical user interface (GUI) intensive but, because it is barebones, can normally process tasks much faster. While it can be used by many industries, it is largely a favorite of law firms and retail stores.
Based on how it handles files, the main feature of object access method is to help store lots of files, such as pictures, shipping lists, documents, and many other computer files. Not only can it store a lot of files, but the files can be quite large. Most mainframe systems can only hold small documents, but OAM can hold up to 2GB thanks to memory optimization.
When files enter a database or access method, each file is usually cataloged to make it easier to find. This approach has some advantages, but it takes up a lot of memory. With the object access method, the entire set of files is cataloged as a unit, reducing the memory footprint. A simple search command is usually used to help people find a file in the OAM.
When a traditional access method stores a file, it also registers it in the operating system database. This takes up memory, as with the catalog, but can also cause the system to slow down, as it has difficulty processing large numbers of documents. To avoid this, the object access method turns each file into a stream, which makes it easier to open and access.
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