File Fragmentation
- 1. 1 / 5 Fragmentation Adnan Alshulah
- 2. 2 / 5 File Fragmentation Fragmentation happens when there is not a large enough block of contiguous free space available on a file system when a file is being written. The result is that the file's data is split into multiple groups of contiguous blocks, which are dispersed across the hard drive.
- 3. 3 / 5 Issue in File Fragmentation Disk Operations request will increased Negatively impact Disk Performance Affect File System Performance. Increasing time to complete disk service request.
- 4. 4 / 5 Fragmentation XFS ● Report fragmentation for “XFS” file system xfs_db -c frag -r “disk-name” ● Report the number of extents for largefile for both file systems “XFS or EXT4” filefrag -v largefile ● Defragmentation for both largefile or mount file xfs_fsr -v “largefile or “mount-point”
- 5. 5 / 5 Fragmentation EXT4 ● Report fragmentation for “ext4” file system fsck -fn “disk-name” ● Report the number of extents for largefile for both file systems “XFS or EXT4” filefrag -v largefile ● Defragmentation for both largefile, mount file, or specific dir e4defrag -v “largefile, mount-point, or specific dir” e4defrag -c “largefile, mount-point, or specific dir” A useful -c option can be used to calculate fragmentation and determine whether defragmentation is necessary.
- 6. 5 / 5 Fragmentation EXT4 ● Report fragmentation for “ext4” file system fsck -fn “disk-name” ● Report the number of extents for largefile for both file systems “XFS or EXT4” filefrag -v largefile ● Defragmentation for both largefile, mount file, or specific dir e4defrag -v “largefile, mount-point, or specific dir” e4defrag -c “largefile, mount-point, or specific dir” A useful -c option can be used to calculate fragmentation and determine whether defragmentation is necessary.