FCA-based Energy Aware-data Placement Strategy for Intensive Workflow in Cloud Computing.

Review on data replication strategies in single vs. interconnected cloud systems: Focus on data correlation‐aware strategies

“…In this sense, the majority of replication strategies take frequently accessed data into consideration. 29,[31][32][33][34][35]37,38 The cloud context (access history, meta-data, etc.) is then transformed into an extraction context mainly represented by matrices or graphs.…”

“…In this regard, most data correlation-aware strategies in cloud systems employ access correlations for correlation estimation, with the degree of correlation defined by simultaneous or shared access to data. 29,35,37,38 It is important to note that the size of the extraction context affects the time required to extract correlations. Consequently, the majority of data correlation-aware strategies prefers a periodic analysis of the system information.…”

“…In this regard, the majority of strategies utilize accurate and dependable extraction algorithms such as data mining and machine learning algorithms. 29,31,32,34,37,38 Furthermore, they define correlation measure thresholds to avoid grouping data that are not sufficiently correlated. The strategies also employ thresholds and rankings to limit the number of extracted correlated data groups.…”

“…34,108 While other strategies consider the correlated data as granularity for replication. 35,37,38,109 F I G U R E 2 Key steps of a correlation aware data replication strategy in the cloud system.…”

“…[27][28][29][30] Indeed, several data replication strategies have benefited from exploiting this knowledge about data correlations. [29][30][31][32][33][34][35][36][37][38][39][40] To the best of the author's knowledge, there is no survey concentrating on data replication strategies designed for interconnected cloud systems. Therefore, in this article, we provide an analysis of existing strategies in cloud systems, covering single and interconnected clouds.…”