TESA: a temporal and spatial information aware writeback policy for home network-attached storage devices

Huang, Ting-Chang; Chang, Da-Wei

doi:10.1109/tce.2013.6490250

Cited by 6 publications

(1 citation statement)

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“…The former outperforms the latter because it reduces the amount of I/O to the flash memory and disk. In an operating system, dirty data in the volatile memory need to be flushed to storage when the free memory drops below a specific threshold (i.e., memory pressure) . Compared with the ext4 configurations, the TridentFS‐single configurations cause a reduced amount of flushed data because data in the NVRAM do not need to be flushed.…”

Section: Performance Evaluationmentioning

confidence: 99%

TridentFS: a hybrid file system for non-volatile RAM, flash memory and magnetic disk

Huang

Chang

2014

Softw. Pract. Exper.

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SUMMARYA hybrid file system with high flexibility and performance, called Trident file system (TridentFS), is proposed to manage three types of storage with different performance characteristics, that is, Non-Volatile RAM (NVRAM), flash memory and magnetic disk. Unlike previous NVRAM-based hybrid file systems, novel techniques are used in TridentFS to improve the flexibility and performance. TridentFS is flexible by the support of various forms of flash memory and a wide range of NVRAM size. The former is achieved on the basis of the concept of stackable file systems, and the latter is achieved by allowing data eviction from the NVRAM. TridentFS achieves high performance by keeping hot data in the NVRAM and allowing data evicted from the NVRAM to be parallel distributed to the flash memory and disk. A data eviction policy is proposed to determine the data to be evicted from the NVRAM. Moreover, a data distribution algorithm is proposed to effectively leverage the parallelism between flash memory and disk during data distribution. TridentFS is implemented as a loadable module on Linux 2.6.29. The performance results show that it works well for both small-sized and large-sized NVRAM, and the proposed eviction policy outperforms LRU by 27%. Moreover, by effectively leveraging the parallelism between flash memory and disk, the proposed data distribution algorithm outperforms the RAID-0 and a size-based distribution method by up to 471.6% and 82.6%, respectively. By considering the data size and performance characteristics of the storage, the proposed data distribution algorithm outperforms the greedy algorithm by up to 15.5%.

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Section: Performance Evaluationmentioning

confidence: 99%