Re: [CentOS] ext4 in 5.3

On Fri, 23 Jan 2009, Florin Andrei wrote:

Stephen John Smoogen wrote:

...

I make it a habit of eating my own words if I screw up. If the results seen on Ubuntu by one test hold up, it might have a large increase in large writes (but nothing in large reads).

http://www.phoronix.com/scan.php?page=article&item=ubuntu_ext4&num=1

Right, so - Ext4 faster than Ext2? Not surprising. The on-disk format has changed. There's less fragmentation. There are all sorts of clever things included in the new FS. So, yes, it does more work with the disk, but in a much more intelligent way.

Fragmentation is good for SSD's. You get better performance on random I/O than sequential I/O.