Re: xfs: does mkfs.xfs require fancy switches to get decent performance? (was Tux3 Report: How fast can we fsync?)

2015-05-11 Thread David Lang
On Mon, 11 May 2015, Daniel Phillips wrote: On 05/11/2015 03:12 PM, Pavel Machek wrote: It is a fact of life that when you change one aspect of an intimately interconnected system, something else will change as well. You have naive/nonexistent free space management now; when you design

Re: xfs: does mkfs.xfs require fancy switches to get decent performance? (was Tux3 Report: How fast can we fsync?)

2015-05-11 Thread Theodore Ts'o
On Tue, May 12, 2015 at 12:12:23AM +0200, Pavel Machek wrote: Umm, are you sure. If some areas of disk are faster than others is still true on todays harddrives, the gaps will decrease the performance (as you'll use up the fast areas more quickly). It's still true. The difference between O.D.

Re: xfs: does mkfs.xfs require fancy switches to get decent performance? (was Tux3 Report: How fast can we fsync?)

2015-05-11 Thread Daniel Phillips
Hi David, On 05/11/2015 05:12 PM, David Lang wrote: On Mon, 11 May 2015, Daniel Phillips wrote: On 05/11/2015 03:12 PM, Pavel Machek wrote: It is a fact of life that when you change one aspect of an intimately interconnected system, something else will change as well. You have