Re: Poor interactive performance with I/O loads with fsync()ing

2010-04-11 Thread Ben Gamari
On Sun, 11 Apr 2010 18:03:00 +0300, Avi Kivity a...@redhat.com wrote: On 04/09/2010 05:56 PM, Ben Gamari wrote: On Mon, 29 Mar 2010 00:08:58 +0200, Andi Kleena...@firstfloor.org wrote: Ben Gamaribgamari.f...@gmail.com writes: ext4/XFS/JFS/btrfs should be better in this regard

Re: Poor interactive performance with I/O loads with fsync()ing

2010-04-11 Thread Andi Kleen
Has the reason for this been identified? Judging from the nature of metadata loads, it would seem that it should be substantially easier to implement fsync() efficiently. By design a copy on write tree fs would need to flush a whole tree hierarchy on a sync. btrfs avoids this by using a