NILFS

misc

Intro

New Implementation of a Log-Structured File System，included in Linux 2.6.30 kernel

  • take snapshot非常简单，只要记录一下version就可以了
  • 尤其在随机的小文件读写效率更高
  • 在SSD上，NILFS2具有绝对性能优势
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insmod nilfs2.ko 
mkfs – t nilfs2 /dev/sda8 
mount – t nilfs2 /nilfs /dev/sda8

Benchmark

small file
large file

vs Journal File System

JFS保存在日志里的只有metadata，而LFS利用日志记录一切

References

http://www.linux-mag.com/id/7345/

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