Efficient Storage Management for Object-based Flash Memory

Appeared in Proceedings of the 18th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2010).

Abstract

Flash memory has become increasingly popular in today’s storage systems. However, replacing hard drives with flash memory in current systems often either requires major file system changes or causes performance degradation due to the limitations of block-based interface and out-of-place updates required by flash. To alleviate this problem, we propose an object-based model for flash memory that gives the hardware and firmware the ability to optimize performance for the underlying implementation. Based on this model, we propose two new data placement policies that exploit richer information from an object-based interface. Using simulation, we show that cleaning overhead can be reduced by up to 9% by separating data and metadata. Segregating the access time from metadata can further reduce the cleaning overhead by up to 23%.

Publication date:
August 2010

Authors:
Yangwook Kang
Jingpei Yang
Ethan L. Miller

Projects:
Storage Class Memories

Available media

Full paper text: PDF

Bibtex entry

@inproceedings{kang-mascots10,
  author       = {Yangwook Kang and Jingpei Yang and Ethan L. Miller},
  title        = {Efficient Storage Management for Object-based Flash Memory},
  booktitle    = {Proceedings of the 18th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2010)},
  month        = aug,
  year         = {2010},
}