[CentOS] ext4 in 5.3

Florin Andrei florin at andrei.myip.org
Fri Jan 23 21:01:09 UTC 2009

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.

I like the stability of Ext3, but in terms of speed it's not the 
sharpest lightbulb in the toolshed. And after many years of using Linux, 
I'm not even buying the myth that "Linux doesn't need a FS 
defragmenter." That's just not true. It does get fragmented, and due to 
that it does get slower.

Ext4 is a welcome improvement. The upcoming btrfs perhaps even more so.

Florin Andrei


More information about the CentOS mailing list