2009/9/30 Kazuya Mio <k-mio@xxxxxxxxxxxxx>: > e4defrag with -c option outputs "ratio" that means the levels of > fragmentation. However, it's difficult for users to understand, so we will > use blocks per extent instead of ratio. > > Before: > # e4defrag -c /mnt/mp1/file > <File> now/best ratio > /mnt/mp1/file 14/1 0.01% > > Total/best extents 14/1 > Fragmentation ratio 0.01% > Fragmentation score 0.10 > [0-30 no problem: 31-55 a little bit fragmented: 55- needs defrag] > This file(/mnt/mp1/file) does not need defragmentation. > Done. > > After: > # e4defrag -c /mnt/mp1/file > <File> now/best blk/ext > /mnt/mp1/file 14/1 7142 > > Total/best extents 14/1 > Average blocks per extent 7142 > Fragmentation score 0 > [0-30 no problem: 31-55 a little bit fragmented: 55- needs defrag] > This file(/mnt/mp1/file) does not need defragmentation. > Done. RFC If we are going go that far (which I like), how about adding the avg extent size in bytes. (ie. 7142 * blocksize I assume). Also a note about the max blocks / extent might be good. ie. Add a more or less hard coded line Ext4 max blocks per extent 32,768 (128MiB) Otherwise your typical user won't know what perfect is. Greg -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
