Distributed Hash Tables offer a resilient lookup service for unstable distributed environments. Resilient data storage, however, requires additional data replication and maintenance algorithms. These algorithms can have an impact on both the performance and the scalability of the system. In this paper, we describe the goals and design space of these replication algorithms. We examine an existin...

Adaptable systems can improve reliability and performance by allowing dynamic reconfiguration. We are conducting a series of experiments on the RAID distributeel database system to siudy the cost and performance impHcations of providing static and dynamic adaptability, and for increasing the availabiliiy of daia iiems. Our studies of the cost of our adaptable implementation wefe conducted in th...

Grid technology, which together a number of personal computer clusters with high speed networks, can reach the same computing power as a supercomputer does, also with a minimum cost. However, heterogeneous system is called as grid. Scheduling independent tasks on grid is more difficult. In order to utilize the power of grid completely, we demand an efficient job scheduling algorithm to execute ...

Replication can enhance the availability of the data les in a distributed environment. This paper introduces a method for managing replicated data les. Unlike many others, our method provides protocols and algorithms for a more complicated scheme of replication that supports replication with location-variant les and les with a variable degree of replication. We assume the existence of a dynamic...

The data grid is one of the infrastructures for data and storage resource management. Data replication can improve data access performance, fault tolerance, and reduce network transmission bandwidth. As the site storage space is limited in the grid, how to effectively use grid resources become an important challenge. This paper introduces a dynamic grid replication algorithm based on popularity...