No subject

Random Reads (raid, single-disk) 
	Start with 1024 files. 
		100 MB files on the raid system.
		35 MB files on the single-disk system.
	Each thread reads a fixed amount of data from a random location in one file using 4 kB reads. 
		5 MB reads on the raid system.
		1 MB reads on the single-disk system.

So it's not a small random read workload (100GB data set), so the
files on XFS are probably more spread out over multiple AGs
and hence further apart than other filesystems. Hence a greater
average seek distance, hence it slower throughput....

> And asking
> him/her to add -o delaylog would also be good.

Yes, that would be an interesting comparison...

Cheers,

Dave.

-- 
Dave Chinner
david at fromorbit.com