ScaleDefrag: Design and implementation of a scalable file defragmentation tool for flash-based SSDs
Fig 10
Normalized execution time of the existing and proposed schemes on flash-based SSD.
(A) Defragmenting highly fragmented files generated with Varmail workload. (B) Defragmenting moderately fragmented files generated with FFSB workload. (C) Defragmenting less fragmented files generated with Fileserver workload. (D) Defragmenting little fragmented files generated with OLTP workload. The y-axis shows normalized execution time to the e4defrag with one thread (lower is better), and the x-axis shows the number of defragger threads. Across all workloads, ScaleDefrag with both schemes(PD+Async) achieve the shortest defragmentation time.