1.1. Different Usable File Systems note daily events. (Web site counters)
1.1. Different Usable File Systems note daily events. The result: an always coherent file system. And if problems occur, the verification is very rapid and the eventual repairs, very limited. Therefore the time spent in verifying a file system is proportional to its actual use and not related to its size. So ext3 offers journaling file system technology while keeping ext2’s structure, ensuring excellent compatibility. This makes it very easy to switch from ext2 to ext3 and back again. As with ext2, it needs to be unmounted to be resized. 1.1.3. ReiserFS Unlike ext3, reiserfs was written from scratch. It is a journalized file system like ext3, but its internal structure is radically different because it uses binary-tree concepts inspired by database software and also has a variable block size, making it optimal for use with several (thousands or hundreds of thousands of) small files. It also performs well with big files, making it suitable for various uses. It can be resized on the fly , without unmounting the file system. 1.1.4. JFS JFS is the journalized file system designed and used by IBM. Proprietary and closed at first, IBM decided to open it to access to the free software movement. Its internal structure is similar to that of reiserfs. It can not be resized on GNU/Linux. 1.1.5. XFS XFS is the journalized file system designed by SGI and also used with the Irix operating system. Proprietary and closed at first, SGI decided to open it to access by the free software movement. Its internal structure has lots of different features, such as support for real-time bandwidth, extents, and clustered file systems (but not in the free version). With GNU/Linux it can be resized for a bigger size only. You can’t reduce it. Resizing can only be made with a mounted filesystem.