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- Title
Improving write amplification in a virtualized and multimedia SSD system.
- Authors
Li, Dingding; Jin, Hai; Liao, Xiaofei; Yu, Jia
- Abstract
Due to offering fast random-access disk I/O, it appears that solid-state drives (SSD), which is based on NAND flash memory, can suit well with the environment of cloud computing, especially for the cloud providing video streaming services. However, by investigating a practical virtual desktop system, where runs video streaming workloads, we find that importing this kind of SSDs into a virtualized system is not as simple as merely a mechanical replacement. Because a large proportion of disk I/O being included in the video streaming workload is write I/O, the inherent weaknesses of NAND flash memory, write amplification (WA), will be magnified in a guest operating system (OS). Worse, some useful remedies in a native OS become disabled or inefficient due to the interposition of hypervisor layer. This paper describes and analyzes these problems based on a practical virtual desktop system, and then proposes a tailor-made method to relieve them. By evaluating realistic user workloads and several typical benchmarks, the result shows that our method can effectively improve these problems in our virtualized SSD system.
- Subjects
SOLID state drives; INPUT-output analysis; FLASH memory; CLOUD computing; STREAMING video &; television
- Publication
Multimedia Tools & Applications, 2015, Vol 74, Issue 1, p63
- ISSN
1380-7501
- Publication type
Article
- DOI
10.1007/s11042-013-1497-6