Performance and Timeliness in a Database.
Abstract
A methodology is presented for evaluating the system cost/performance of alternative approaches to distributed database management. For each type of database transaction, the management schemes are analyzed to identify the specific control paths and data flow requirements. Then the control and data flow information is used to develop a queuing network model of the entire system. Specific cost/performance analyses can be made when assumptions about particular operating characteristics (such as communication delays, processor power, and disk rates) are incorporated into the model. Average system response time and average network traffic are computed for four management approaches: centralized, a master/slave scheme, a sychronized scheme, and a new scheme called delayed synchronization. The new scheme is based on daily operation without synchronizing updates, supported by nightly merging to produce identical data copies throughout the system. Timeliness information is associated with every individual data item and users are given a choice in retrieval transactions between quick response and most recently updated values. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 03, 1979
- Accession Number
- ADA074552
Entities
People
- Lynn A. Denoia
Organizations
- Naval Underwater Systems Center