A Hybrid Solid-State Storage Architecture for the Performance, Energy Consumption, and Lifetime Improvement

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Provided by: Institute of Electrical & Electronic Engineers
Topic: Storage
Format: PDF
In recent years, many systems have employed NAND flash memory as storage devices because of its advantages of higher performance (compared to the traditional hard disk drive), high-density, random-access, increasing capacity, and falling cost. On the other hand, the performance of NAND flash memory is limited by its \"Erase-before-write\" requirement. Log-based structures have been used to alleviate this problem by writing updated data to the clean space. Prior log-based methods, however, cannot avoid excessive erase operations when there are frequent updates, which quickly consume free pages, especially when some data are updated repeatedly.
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