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