Disconnected operation in the Thor object-oriented database system

Author

Gruber, Robert ; Kaashoek, Frans ; Liskov, Barbara ; Shrira, Liuba

Author_Institution

Lab. for Comput. Sci., MIT, Cambridge, MA, USA

fYear

1994

fDate

8-9 Dec 1994

Firstpage

51

Lastpage

56

Abstract

The paper discusses issues raised by providing disconnected operation in the Thor object-oriented database system. Disconnected operation in such a system poses new challenges because of the small size of objects, the richness and complexity of their interconnections, the huge number of them, and the fact that they are accessed within atomic transactions. We propose three techniques to address these challenges: (1) using the database query language for hoarding; (2) using dependent commits to tentatively commit transactions at the disconnected client; (3) using the high-level semantic of objects to avoid transaction aborts

Keywords

cache storage; client-server systems; computational linguistics; distributed databases; microcomputers; object-oriented databases; portable computers; query languages; query processing; transaction processing; Thor object-oriented database system; atomic transactions; database query language; dependent commits; disconnected client; disconnected operation; high-level semantic; hoarding; interconnections; objects; transaction aborts; Computer science; Database languages; Database systems; Delay; File systems; LAN interconnection; Laboratories; Mobile computing; Object oriented databases; Transaction databases;

fLanguage

English

Publisher

ieee

Conference_Titel

Mobile Computing Systems and Applications, 1994. Proceedings., Workshop on

Conference_Location

Santa Cruz, CA

Print_ISBN

0-8186-6345-6

Type

conf

DOI

10.1109/MCSA.1994.512734

Filename

512734