zfs generate a lot of IO ?

Ståle Kristoffersen staalebk at ifi.uio.no
Mon May 28 23:48:30 UTC 2007


On 2007-05-27 at 10:28, Huang wen hui wrote:
> hi,
> I install CURRENT with zfs root fs on my notebook(T60P). GENERIC
> configuration
> without INVARIANTS and WITNESS.
> I run a program to test. This program basically read a few small files
> and calcuate and output a small file.
> On FreeBSD6.2, iostat show that It generate a few io operation.
> But on zfs, generate a lot:

<snip>

This could be the same thing Nick Gustas and I have been seeing. Try
setting vfs.zfs.prefetch_disable="1" in loader.conf, this made things
"normal" for me.

-- 
Ståle Kristoffersen
staalebk at ifi.uio.no


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