Paper Info
Title
MRAMFS: A Compressing File System for Non-Volatile RAM
Abstract
File systems using non-volatile RAM (NVRAM) promise great improvements in file system performance over conventional disk storage. However, current technology allows for a relatively small amount of NVRAM, limiting the effectiveness of such an approach. We have developed a prototype in-memory file system which utilizes data compression on inodes, and which has preliminary support for compression of file blocks. Our file system, mramfs, is also based on data structures tuned for storage efficiency in non-volatile memory. This prototype will allow us to examine how to more efficiently use this limited resource. Simulations have shown that inodes can be reduced to 15-20 bytes each at a rate of 250,000 or more inodes per second. This is a space savings of 79-85% over conventional 128-byte inodes. Our prototype file system shows that for metadata operations, inode compression does not significantly impact performance, while significantly reducing the space used by inodes. We also note that a naive block-based implementation of file compression does not perform acceptably either in terms of speed or compression achieved.
Year
DOI
Venue
2004
10.1109/MASCOT.2004.1348317
MASCOTS
Keywords
Field
DocType
data compression,random-access storage,storage management,NVRAM,data compression,file compression system,in-memory file system,inodes,metadata operations,nonvolatile RAM
File Control Block,File system,Flash file system,Stub file,Self-certifying File System,Computer science,Versioning file system,Computer hardware,File system fragmentation,Computer file
Conference
ISBN
Citations 
PageRank 
0-7695-2251-3
28
1.54
References 
Authors
15
4
Name
Order
Citations
PageRank
Nathan K. Edel1281.54
Deepa Tuteja2492.54
Ethan L. Miller32870281.96
Scott A. Brandt4166394.81