Implementation of Distributed File System on Object Group Platform "Jgroup"

الملخص

Distributed systems building techniques aims to interact the application components which are placed on different machines and connected through a network. The increasing reliance on these systems in day-to-day activities requires that their techniques to provide available and reliable services. Neither RMI nor CORBA can achieve this requirement; because they cannot support one-to-many interaction.

Jgroup provides dependable services through its integration of object group paradigm with the distributed object model of Java RMI, so it offers a Group Communication System depends on RMI in all its interactions; whether internal for coordination between object group replicas, or external for communicating clients with object group.

This paper implements a distributed file system benefits of all provided facilities of Jgroup in performing the main operations (list all files, download a file, upload a file, and modify          a file).

This research evaluates performance of the system through measurement of delay required to upload files of different sizes from clients; with increasing the number of servers.

In addition to evaluation of performance through measurement of delay required to download a file with increasing the number of clients' requests. 

Results show that the delay for uploading a file increases with increasing number of servers in object group, and the delay for downloading a file doesn't affected by increasing the number of clients' requests.