ReiserFS Filesystem
ReiserFS is a general-purpose, journaled computer file system designed and implemented by a team at Namesys led by Hans Reiser. ReiserFS is currently supported on Linux and may be included in other operating systems in the future. Introduced in version 2.4.1 of the Linux kernel, it was the first journaling file system to be included in the standard kernel.
ReiserFS Features
ReiserFS has fast journaling, which means that you don’t spend your life waiting for fsck every time your laptop battery dies, or the UPS for your mission critical server gets its batteries disconnected accidentally by the UPS company’s service crew, or your kernel was not as ready for prime time as you hoped, or the silly thing decides you mounted it too many times today.
ReiserFS is based on fast balanced trees. Balanced trees are more robust in their performance, and are a more sophisticated algorithmic foundation for a file system. When we started our project, there was a consensus in the industry that balanced trees were too slow for file system usage patterns. We proved that if you just do them right they are better–take a look at the benchmarks. We have fewer worst case performance scenarios than other file systems and generally better overall performance. If you put 100,000 files in one directory, we think its fine; many other file systems try to tell you that you are wrong to want to do it.
ReiserFS is more space efficient. If you write 100 byte files, we pack many of them into one block. Other file systems put each of them into their own block. We don’t have fixed space allocation for inodes. That saves 6% of your disk.
Ext3 & ReiserFS has three kinds of journaling methods
1) Journal Data Writeback
2) Journal Data Ordered
3) Journal Data
By default the the 2nd method is used. To speed things up we will make it use method 1. The price to pay is that it may allow old data to appear in files after a crash and journal recovery.
If in case you face any kind of ReiserFS system crash and need to recover your data from ReiserFS file system then “Quick Recovery for Linux ReiserFS” is the solution.
Recover ReiserFS Files using “Quick Recovery for Linux ReiserFS“.
