[CentOS] ext4 in 5.3

Dag Wieers dag at centos.org
Sat Jan 24 13:53:16 UTC 2009


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.

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