實時數據庫系統(tǒng)vegebam2.0的關鍵技術研究與實現

1、西安科技大學碩士學位論文實時數據庫系統(tǒng)VegeBam2.0的關鍵技術研究與實現姓名：張弛申請學位級別：碩士專業(yè)：計算機軟件與理論指導教師：李愛國2011-06Subject : Research and Implementation of Key Technology on Real- time Database System Called VegeBam2.0 Specialty : Computer So

2、ftware and Theory Name : Zhang Chi (Signature) Instructor : Li Aiguo (Signature) ABSTRACT In this thesis the architecture of the real- time database system called VegeBam2.0 is designed based on Veg

3、eBam1.0. As a result of that, a real- time database system called VegeBam2.0 is developed, which is of proprietary intellectual property rights. The main contents are as follows: Requirements of

4、 real- time database system VegeBam2.0 are described and VegeBam2.0 system is analyzed, and then system structures are designed. For the reading/writing data on the client in the network environm

5、ent, the possible solution is given that: design the communication protocol of server and client, so that the client can get fast database access and read or write mass data. In order to imp

6、rove the query speed of multi- demensional data, an improved dynamic index structure called RSR- tree is proposed based on RS- tree. In RSR- tree, index records of a leaf node are split to ens

7、ure the sequence ordering of index records in a leaf node, which reduces the addressing cost of I/O operations effectively when reading data files. The entries of a non- leaf node are split

8、to decreases the overlap between the brother nodes, which reduces effectively the number of scanning index records, thereby reducing the time of reading data from data files. The overlap region

9、s bettween nodes in RSR- tree are reduced and the number of I/O operations is decreased significantly. RSR- tree can efficiently improve query performance and does not bring extra cost of creating index

10、 at the same time. Experimental results show that the query speed of RSR- tree is 12 times faster than the one of RS- tree, which improves dramatically. A Real- time database system called Veg

11、eBam2.0 is developed based on the above researches, which consists of three systems: VegeBam2.0 console system, VegeBam2.0 client system and communications system. VegeBam2.0 console runs on the