BLF: an efficient flash translation layer scheme for flash-based storage systems
| Autor: | Yin Yang, Zhihu Tan, Kai Wang, Changsheng Xie, Wenyi Li |
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| Rok vydání: | 2015 |
| Předmět: |
Scheme (programming language)
Hardware_MEMORYSTRUCTURES business.industry Computer science General Engineering Parallel computing Flash memory Flash (photography) Table (database) business Translation table computer Computer hardware Flash file system computer.programming_language Garbage collection Block (data storage) |
| Zdroj: | Journal of the Chinese Institute of Engineers. 38:938-946 |
| ISSN: | 2158-7299 0253-3839 |
| Popis: | The performance of flash memory is limited by its “erase-before-write,” and erase operations can only be performed in a much larger unit than write operations. To address these problems, we propose an efficient flash translation layer scheme called BLF: Block List Flash Translation Layer. BLF unites log blocks and physical blocks for servicing update requests. It can avoid uneven erasing and low block utilization. The address translation table of BLF can avoid storing an extra internal mapping table. BLF’s garbage collection method divides the storage zone into three levels: the active zone where hot data are stored, the inactive zone where cold data are stored, and the transitional zone where reclamation block is stored. If invalid blocks can be reclaimed properly and intensively, merging log blocks with physical blocks can be avoided and the amount of operations can be reduced. Finally, we implement an accurate flash simulator to evaluate the efficacy of BLF and compare it with other flash schemes, demo... |
| Databáze: | OpenAIRE |
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