DGDBM: programming support for distributed transactions over replicated files

Authors:
Maria Consuelo Franky
Affiliations:
Depto. de Ingenieria de Sistemas y Computación, Universidad de los Andes, Apartado Aéreo 4976, Santafé de Bogotá - Colombia
Venue:
ACM SIGOPS Operating Systems Review
Year:
1995

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Abstract

This paper describes a set of facilities for programming distributed transactions over replicated files which are accessed by primary key. The files are located on several computers communicated by a network. Each site has the set of GNU dbm (Gdbm) routines for local file management [15]. Above this platform we have built an interface and a set of services for distributed transaction programming. The resulting programming environment,"DGDBM", offers transparency in relation to data distribution and data replication, giving a centralized vision to the programmer. It assures the functions of management of distributed transactions like as failure recovery, mutual consistency between copies and concurrence control. DGDBM is an useful support for distributed application programming over replicated files in UNIX networks and it is available as an API (application programming interface) for the C programmer. This paper describes the services offered by DGDBM to the programmer, the architecture of the system, the adopted solutions for distributed transaction management, the general aspects of design and implementation and the perspectives and planned extensions for this project.