A Joint Operation Mechanism for Flash Translation Layers

• Main Authors: Syuan-an Chen, 陳璿安
• Other Authors: Chin-hsien Wu
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/28338931699982340579

碩士 === 國立臺灣科技大學 === 電子工程系 === 102 === In the storage systems of NAND flash memory, an intermediate software called a Flash Translation Layer (FTL) is adopted to hide the characteristics of NAND flash memory and provide efficient management for NAND flash memory. Current flash translation layers can be classified into page-mapping FTLs, block-mapping FTLs, and hybridmapping FTLs. In order to utilize the advantages of page-mapping FTLs and block-mapping FTLs, hybrid-mapping FTLs are proposed to store data to the appropriate mapping mechanism by switch the mapping information between the page-mapping mechanism and the block-mapping mechanism. In the thesis, we purpose a joint operation mechanism to utilize the advantages of the page-mapping FTLs, the block-mapping FTLs, and the hybrid-mapping FTLs. With the joint operation mechanism, flash translation layers can consider the main memory requirements, improve the system performance, and reduce the garbage collection overhead. The experimental results show that the proposed joint operation mechanism can achieve the goal under realistic workloads and benchmarks.