Copyright 2011-2017 Storage Research Group @ Tsinghua University


RAMSSD: Open-Channel SSD Simulator 

-- emulate open-channel SSDs in memory


RAMSSD is used for system evaluatation on Raw Flash Devices (a.k.a., Open-Channel SSDs).
The simulator is implemented based on FlashSim (Brendan Tauras from PSU).
Major ifferences between FlashSim and RAMSSD are:
(1) support open-channel SSD operations, and
(2) emulate the storage to keep the data in the memory (data contents are kept).
It has been used for the evaluation or the early evaluation (before using the real device) for our
research:

(1) Youyou Lu, Jiwu Shu, Weimin Zheng. "Extending the Lifetime of Flash-based Storage through Reducing Write Amplification from File Systems",in Proceedings of the 11th USENIX Conference on File and Storage Technologies (FAST'13), February 12-15, 2013, San Jose, USA 

(This is the first work to propose the Open-Channel SSD for re-architecting flash storage systems.)

(2) Wei Wang, Youyou Lu, Jiwu Shu. "p-OFTL: An Object-based Semantic-aware Parallel Flash Translation Layer", in Proceedings of Design, Automation and Test in Europe (DATE'14), March 24-28, 2014, Dresden, Germany 

(3) Youyou Lu, Jiwu Shu, Wei Wang. "ReconFS: A Reconstructable File System on Flash Storage"
, in Proceedings of the 12th USENIX Conference on File and Storage Technologies (FAST'14), February 17-20, 2014, Santa Clara, USA 

(4) Jiacheng Zhang, Jiwu Shu, Youyou Lu. "ParaFS: A Log-Structured File System to Exploit the Internal Parallelism of Flash Devices", in Proceedings of the USENIX Annual Technical Conference (USENIX ATC'16), June 22-24, 2016, Denver, CO


This simulator is part of our work Software Managed Flash (https://storage.cs.tsinghua.edu.cn/~lu/research/smf.html).



Contact:
Wei Wang
Jiacheng Zhang
Fei Li (current contact)
Youyou Lu