Content deleted Content added
changed spelling of "catalogue" to IBM US English "catalog" and made other minor punctuational and elisory corrections |
Peter Flass (talk | contribs) add history, ref, and external link |
||
Line 1:
{{Unreferenced stub|auto=yes|date=December 2010}}
'''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 [[Virtual storage access method|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|DB2]]. An example use case for OAM would be storing medical images in a DB2 database running under z/OS.
==History==
OAM was created in the 1980s "as a prototype product for an insurance company to replace microfiche." Initially OAM supported optical storage and magnetic disks. In the 1990s support for [[Magnetic tape data storage|magnetic tape]] was added. In 2011 support was added for storage of objects in a z/OS unix file system—either [[zFS (IBM file system)|zFS]] or [[Network File System|NFS]].<ref name=Vitse>{{cite journal|last1=Vitse|first1=Caroline L.|title=Reintroducing Object Access Method|journal=IBM Systems Magazine|date=September 2011|url=http://www.ibmsystemsmag.com/mainframe/storage/Data-Management/reintroducing_OAM/|accessdate=Sep 4, 2014}}</ref>
==References==
{{Reflist}}
==External links==
* [https://share.confex.com/share/116/webprogram/Handout/Session9008/SHARE_Anaheim11_9008_OAM.pdf DFSMS Object Support:Data Archiving with OAM]
{{compu-storage-stub}}
| |||