| | Date | Wed, 7 Oct 2009 22:45:02 +0800 | | From | Wu Fengguang <> | | Subject | Re: [PATCH 00/45] some writeback experiments |
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On Wed, Oct 07, 2009 at 10:26:32PM +0800, Theodore Ts'o wrote: > On Wed, Oct 07, 2009 at 03:38:18PM +0800, Wu Fengguang wrote: > > > > The estimated writeback bandwidth is about 1/2 the real throughput > > for ext2/3/4 and btrfs; noticeable bigger than real throughput for NFS; and > > cannot be estimated at all for XFS. Very interesting.. > > Can you expand on what you mean here? Estimated write bandwidth of > what? And what are you comparing it against?
Please refer to [PATCH 21/45] writeback: estimate bdi write bandwidth and patch 22, I have some numbers there :)
> I'm having trouble understanding your note (which I'm guessing you > write fairly late at night? :-)
Sorry - I wrote that when I got tired on debugging ;)
Thanks, Fengguang
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