A two phased service oriented Broker for replica selection in data grids

Taxonomy of Optimization Approaches of Resource Brokers in Data Grids

“…M. Almuttairi et al [1]. This is our proposed work, it is a replica selection Broker that can be used to reduce the cost of total time of Data Grid job.…”

“…The objective of the first aspect is to enhance selecting process by new methods which select set of replica servers instead of one replica provider site [1], whereas the second aspect aims to improve the efficiency of transferring the requested files between the selected computing sites and replica provider sites [12].…”

“…Minimizing (reducing) Cost: Here, the selection strategy selects the cheapest replica to be the best replica site using the answer from auction protocol [1] Minimizing (reducing) Time: Here, the selection strategy attempts to reduce the total job execution time in different ways such as minimizing the look up time, and/or searching time and/or transmission time. Minimizing both: Here, the selection strategy reduces cost and time such that the answer from selection strategy is used in the economy-based data replication Broker [2] According to reduce the total execution time, the selection strategies of previous works are classified into three types according to the time period they wanted to minimize.…”

A PGSA Based Data Replica Selection Scheme for Accessing Cloud Storage System

“…The selection probability of each replica is calculated by Eqn. (8) and then the roulette method is used to select the specific replica. The selection process is described as follows.…”

“…In [7], an adaptive replica selection strategy was presented to employ network bandwidth information and account for its fluctuation in the wide-area environment, taking advantage of multiple replicas and concurrent data transfers. In [8], a two phased replica selection scheme was proposed. In the first coarse-grain phase, replicas with low latency (located at the uncongested network segments) and replicas with high latency (located at the congested network segments) were distinguished.…”