VsamExtreme 6.0.9
VsamExtreme is a software designed to allow application developers to incorporate data management into their applications.
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299.00 
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Windows Vista 
VsamExtreme is a software designed to allow application developers to incorporate data management into their applications.
Each record is named with a label called a key, much like a disk file has a file name. A record consists of all of the fields for which information has been supplied and previously saved by the application.
The essential operations are READ a record and WRITE a record. There are extensions that provide OPEN, CLOSE, SetBOF and SetEOF functionality.
Because VsamExtreme restores data management to the application at the lowest level, it is Inherently lightning fast. The VsamExtreme ISAM gives the programmer a lot of flexibility in organizing all kinds of tables and ad hoc information.
Records in a VsamExtreme ISAM dataset are indexed using variable length keys (labels) of up to 252 characters. This means that the programmer can get to any data item instantly by any key, usually in microseconds. At any point, data may be retrieved sequentially from the current spot, either forward or backward in direction.
Data is maintained alphanumerically (kind of like a Rolodex file). Since the VsamExtreme ISAM is totally consistent, as records are added and removed it reacts as you would normally expect in the real world - there is no guessing about where the data went or how to get it back!
On modern PC's, query functions allow for complex full text Boolean searches at over 5 MB per second. Fully indexed Dynasets may be created from the resulting queries.
In addition to VsamExtreme being an ISAM, it also supports multiple simultaneous access by many users (multi user), all of whom may be actively retrieving or updating the dataset.
While VsamExtreme supports data sharing through the Microsoft "Shared file" model, the Client/Server shell ( Vservice) will cut network loading and improve network access by several orders of magnitude. It will run on any Windows computer, not just a Microsoft server.
There are no "Opportunistic Locking" bottlenecks to consider. The Vservice model virtually eliminates the tremendous overhead imposed by the Microsoft shared file model, not to mention the expense required to support a full Microsoft server.
VsamExtreme ISAM is a royalty free product that runs on any network supporting binary data files. It's small (about 170k of executing code), supports full "Record Locking", is easy to use and as reliable as an anvil. This makes it attractive for those programmers who find other larger data access engines too slow, too big, too complex or too unreliable to create stable end-user products.
VsamExtreme features
Limitations
tags
vsamextreme isam variable length microsoft server file model shared file application defined fields may the fly field attributes microsoft shared records are there are record and
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