File systems EXT3, EXT4 and XFS difference:
1. EXT3
(1) only support up to 2TB and 32TB file system file, the actual file system can only accommodate 2TB and 16GB of files
(2) Ext3 currently only supports 32,000 subdirectories
(3) Ext3 file system using 32-bit number of the recording block number and spatial nodes i-
Writing (4) When the data in the file system to Ext3, Ext3 data block allocator can only assign a block of 4KB
2. EXT4
EXT4 is the log file system for Linux systems, is the successor to EXT3 file system.
File system capacity (1) Ext4 reached 1EB, while files of up to 16TB
(2) support for theoretically unlimited number of subdirectories
(3) Ext4 file system using 64-bit number of the recording block number and spatial nodes i-
(4) Ext4 support multi-block allocator allocates a plurality of data blocks of a call
3. XFS
(1) According to the recorded log file contents fast recovery disk in a very short period of time
(2) optimization algorithm, the overall impact of logging file operations very small
(3) is a full 64-bit file system that can support millions of bytes of storage space T
(4) capable of approaching nude performance storage device I / O data