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Modern solid state disk (SSD) has a buffer (SDRAM), which is used to store commonly used data and map in the near future. How to efficient management of this buffer is an important things of improving performance of SSD. Flash read and write speed have asymmetric characteristic. SSD buffer management algorithms must consider this characteristic of flash. Current page mapping SSD buffer management...
Owing to their relatively high random-I/O performance and energy-efficiency, SSDs have been widely deployed in data-intensive computing environments as caching and/or terminal storage devices. The buffer-cache of an SSD plays an essential role in bridging the speed gap between the flash components and the host interface. While the existing SSD buffer management schemes are designed to improve SSD...
Flash-based Solid State Drive (SSD) has limitations in terms of cost and lifetime. It is used as a second-level cache between main memory and traditional HDD-based storage widely. Adopting traditional cache algorithms, which are designed primarily depending on temporal locality and popular blocks, to SSD-based second-level disk cache can cause unnecessary cache replacements, which not only degrade...
Recent years, the application of solid-state disks (SSDs) increases explosively. All SSDs have to employ error correcting code (ECC) technique to ensure the reliability of flash memory at page level. However, data loss may be caused by bad block or chip failure of flash memory. To solve this problem, the article proposes a flash memory redundant array technique, which is similar to RAID-4. In this...
Flash Translation Layer (FTL) is one of the most important components of SSD, whose main purpose is to perform logical to physical address translation in a way that is suitable to the unique physical characteristics of the Flash memory technology. The pure page-mapping FTL scheme, arguably the best FTL scheme due to its ability to map any logical page number (LPN) to any physical page number (PPN)...
A single flash-based Solid State Drive (SSD) can not satisfy the capacity, performance and reliability requirements of a modern storage system supporting increasingly demanding data-intensive computing applications. Applying RAID schemes to SSDs to meet these requirements, while a logical and viable solution, faces many challenges. In this paper, we propose a Hybrid Parity-based Disk Array architecture,...
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