[CentOS] ext4 in 5.3

Peter Kjellstrom cap at nsc.liu.se
Wed Jan 21 17:37:30 UTC 2009


On Wednesday 21 January 2009, nate wrote:
> Renato de Oliveira Diogo wrote:
> > Hi;
> >
> > Do you test in other file system? Like xfs or jfs?
> > You can use the "time" command to get the exate time:
> > # time cp /pathsource/file8g /pathdest/
> >
> > Post here yours results.
>
> I like to use rsync with --progress so it shows realtime
> updates on the status of the copy when testing performance
> like that.
>
> But I agree that the file system likely will not have a
> noticeable overhead with regards to copy performance on
> single 8GB files, now 10,000 files that take up 8GB of
> space I can see a file system having a performance impact.

I disagree. On most raid-controllers we use XFS has a significant advantage 
over Ext3 when it comes to large sequential writes. Ext3 gets nowhere near 
the bare metal performance.

So, in short, I think it will be interesting to see how Ext4 performs for 
this.

/Peter
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