JFFS2

JFFS2 is the Journaling Flash File System version 2, jffs2 is a log-structured file system for flash memory devices and has support for NAND devices, also Hard links and compression algorithms like zlib, rubin, and rtime.

Jffs2 also has a garbage collection algorithm that eliminates unnecessary I/O.

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Algorithms

Zlib

Lossless data-compression library,

• Manual
• Examples

rubin

This simple algorithm is faster than zlib but not quite as effective.

rtime

This is a simple algorithm that often manages to squeeze extra few bytes from data already compressed with gzip

Links

• JFFS2 at Wikipedia
• JFFS at Wikipedia
• Summary on JFFS
• Homepage of JFFS at AXIS
• Logfs