Re: Xfs delaylog hanged up

Stan Hoeppner
2010-11-23T22:12:40Z

Dave Chinner put forth on 11/23/2010 2:46 PM:

> I've been unable to reproduce the problem with your test case (been
> running over night) on a 12-disk, 16TB dm RAID0 array, but I'll keep
> trying to reproduce it for a while. I note that the load is
> generating close to 10,000 iops on my test system, so it may very
> well be triggering load related problems in your raid controller...

Somewhat off topic, but how are you generating 10,000 IOPS by carving a
16TB LUN/volume from 12 x 2TB SATA disk spindles? Such drives aren't
even capable of 200 seeks per second. Even if they were you'd top out
at less than 2,500 IOPS (random). 16TB/12=1.33 TB per disk. No such
capacity disk exists. So I assume you're using 12 x 2TB disks and
slicing/dicing out 16TB. What am I missing Dave?

--
Stan