Enabling Ultra-Scale Flash Memory Storage in the Post-Gigabyte Era: Performance, Scalability and Reliability
| Autor: | Chien-Chung Ho, 何建忠 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 To meet the growing capacity needs of flash-based storage systems, 3D (NAND) and multi-level-cell (MLC) flash memory are widely considered the promising alternative to continuously scale up the capacity of flash chips. However, the rapid growth of the capacity of a flash-memory storage device imposes challenges on the designs of ultra-scale flash memory storage, such as performance, scalability and reliability issues. This dissertation proposes methodologies from different view points to resolve design issues caused by the keep-changing characteristics of flash memory. We first propose a hybrid index design that over DRAM and flash memory simultaneously to solve the performance issue. The proposed idea can achieve excellent performance even the DRAM space of the evaluated system is very limited. Today’s SSD controllers are facing problems as flash is continuously and frequently updated. Such a phenomenon introduces large cost and heavy bus load on the design of SSD controllers. As a result, a module design to construct an eMMC-enabled SSD is then proposed to solve the scalability issue. An access pattern reshaping design is proposed to simultaneously consider the I/O performance and properties of eMMC-enabled SSDs. With the idea of eMMC-enabled SSD, industry and vendor might has another option to face the problem. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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