2009/10/01 3:28, Greg Freemyer wrote:: > 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) Your ideas sound good. How about the following output image? # e4defrag -c /mnt/mp1/file <File> now/best KB/ext /mnt/mp1/file 14/1 4000 Total/best extents 14/1 Min bytes per extent 1024 KB Max bytes per extent 20489 KB Average bytes per extent 4000 KB 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. Regards, Kazuya Mio -- 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
