Dynamic replica strategy for local distributed storage systems
Chen Gang · Computer Engineering and Applications Journal · 2010
Based on the characteristics of topology and storage nodes of local distributed storage systems,a new Frequency Based Dynamic Replica(FBDR) strategy is proposed.FBDR uses two newly proposed algorithms called OFMI(One way Frequency Measure by Intensity) and TFMS(Two way Frequency Measure by Span) to identify hot files based on their access record history to improve the hit rate of hot files.FBDR takes available space,system load and IO performance of storage nodes into account to decide the location to replicate files,which not only improves the IO performance of frequently accessed files,but also balances the system load and resource consumptions on different storage nodes.