S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Computer Science and Engineering (컴퓨터공학부) Others_컴퓨터공학부
An empirical evaluation of enterprise and sata-based transactional solid-state drives
- Son, Yongseok; Kang, Hara; Ha, Jin-Yong; Lee, Jongseong; Han, Hyuck; Jung, Hyungsoo; Yeom, Heon Young
- Issue Date
- 2016 IEEE 24th International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), pp. 231-240
- 공학; digital storage; SATA-based transactional solid-state drives; Samsung enterprise-class SSD; TxSSD-aware file systems; crash consistency; empirical evaluation; enterprise storage; transactional SSD; transactional functionality; Computer crashes; Computer science; Cows; Metadata; Performance evaluation; Standards; Supercapacitors
In most file systems, performance is usually sacrificed in exchange for crash consistency, which ensures that data and metadata are restored consistently in the event of a system crash. To escape this trade-off between performance and crash consistency, recent researchers designed and implemented the transactional functionality inside Solid State Drives (SSDs). However, in order to investigate its benefit in a more realistic and standard fashion, this scheme should be re-evaluated in enterprise storage with standard interface. This paper explores the challenges and implications of a transactional SSD with extensive experiments. To evaluate the potential benefit of transactional SSD, we design and implement the transaction functionality in Samsung enterprise-class and SATA-based SSD (i.e., SM843TN) and name it TxSSD. We then modify the existing file systems (i.e., ext4 and btrfs) on topof TxSSD, making both file systems crash-consistent without redundant writes. We perform performance evaluation of two filesystems by using file I/O and OLTP benchmarks with a database. We also disclose and analyze the overhead of transactional functionality inside SSD. The experimental results show that TxSSD-aware file systems exhibit better performance compared to crash-consistent modes (i.e., data journaling mode of ext4 and cow mode of btrfs) but worse performance compared to weak consistent modes (i.e., ordered mode of ext4 and no datacow mode of btrfs).
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