Chapter-12

Chapter-12 - * Transaction processor (TP) receives and...

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** Transaction processor (TP) receives and processes the application’s data requests. (also known as the application processor) ** Data processor (DP) stores and retrieves data located at the site. Also known as data manager. QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture. *Note: Each TP can access data on any DP and each DP handles all requests for local data from any TP. DDBMS transparency features allow the end user to think that s/he is the database’s only user. Distribution transparency - allows us to manage a physically dispersed database as though it were a centralized database. There are 3 levels 1. (High) Fragmentation transparency – query as if you are querying a centralized database 2. (Medium) Location Transparency - query based on fragment name 3. (Low) Local Mapping Transparency – query based on l ocation name and fragment name QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
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Chapter-12 - * Transaction processor (TP) receives and...

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