An Overview of Vertical Partitioning in Object-Oriented Databases
نویسندگان
چکیده
In this paper, some interesting issues related to vertical partitioning in object oriented database systems are presented. A review of existing research is given with an identification of some open problems. A taxonomy of various possible partitioning schemes and a unified view of the vertical partitioning problem are also presented. Existing vertical partitioning algorithms have been studied for their use in both parallel and distributed object-oriented databases.
منابع مشابه
Vertical Partitioning in Object Oriented Databases Using Intelligent Agents
Vertical partitioning is an important technique in which attributes of a relation assigned to partitions, is aimed at improving database performance. The complexity of object-oriented databases models due to subclass hierarchy and class composition hierarchy complicates the definition and representation of vertical partitioning of the classes. In this research paper, we propose a new algorithm ...
متن کاملMethod Transformations for Vertical Partitioning in Parallel and Distributed Object Databases
Vertical partitioning is a useful technique for performance improvement in parallel and distributed object oriented database systems (POBSs and DOBSs). Arising from partitioning, there is a need to modify methods in a user deened schema for correct execution in the partitioned domain. A partitioning scheme should also support application transparency in order to make schema deenitions and verti...
متن کاملAn Evaluation of Vertical Class Partitioning for Query Processing in Object-Oriented Databases
-Vertical partitioning is a design technique for reducing the number of disk accesses to execute a given set of queries by minimizing the number of irrelevant instance variables accessed. This is accomplished by grouping the frequently accessed instance variables as vertical class fragments. The complexity of object-oriented database models due to subclass hierarchy and class composition hierar...
متن کاملA Vertical Partitioning Algorithm for Distributed Object Oriented Databases
Object Oriented Databases (OODB) is becoming popular day by day and being used in a large number of application domains. In order to support homogeneous distributed OODBs a clear understanding of partitioning of class and how to do it by using different partitioning algorithms is needed. In this paper an algorithm for vertical fragmentation in a model consisting of class and comprising of compl...
متن کاملCost-Driven Evaluation of Vertical Class Partitioning in Object-Oriented Databases
Vertical partitioning is a proven database design technique which increases the eflciency of query execution by reducing the irrelevant data accesses. In this paper, we develop a cost model to study the effectiveness of vertical partitioning in OODBs, in terms of reducing the number of disk accesses for executing a set of queries. Further, we compare and evaluate two different (namely, afinity-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Comput. J.
دوره 42 شماره
صفحات -
تاریخ انتشار 1999