標題: Dual Greedy: Adaptive Garbage Collection for Page-Mapping Solid-State Disks
作者: Lin, Wen-Huei
Chang, Li-Pin
資訊工程學系
Department of Computer Science
公開日期: 1-Jan-2012
摘要: In the recent years, commodity solid-state disks have started adopting powerful controllers and implemented page-level mapping for flash management. However, many of these models still use primitive garbage-collection algorithms, because prior approaches do not scale up with the dramatic increase of flash capacity. This study introduces Dual Greedy for garbage collection in page-level mapping. Dual Greedy identifies page-accurate data hotness using only block-level information, and adaptively switches its preference of victim selection between block space utilization and block stability. It can run in constant time and use very limited RAM space. Our experimental results show that Dual Greedy outperforms existing approaches in terms of garbage-collection overhead, especially with large flash blocks.
URI: http://hdl.handle.net/11536/146836
ISSN: 1530-1591
期刊: DESIGN, AUTOMATION & TEST IN EUROPE (DATE 2012)
起始頁: 117
結束頁: 122
Appears in Collections:Conferences Paper