On Tue, 26 Jun 2007, Justin Piszcz wrote:

> 
> 
> On Tue, 26 Jun 2007, Jon Nelson wrote:
> 
> > On Mon, 25 Jun 2007, Justin Piszcz wrote:
> >
> > > Neil has a patch for the bad speed.
> >
> > What does the patch do?
> >
> > > In the mean time, do this (or better to set it to 30, for instance):
> > >
> > > # Set minimum and maximum raid rebuild speed to 60MB/s.
> > > echo "Setting minimum and maximum resync speed to 60 MiB/s..."
> > > echo 60000 > /sys/block/md0/md/sync_speed_min
> > > echo 60000 > /sys/block/md0/md/sync_speed_max
> >
> > sync_speed_max defaults to 200000 on this box already.
> > I tried a binary search of values between the default (1000)
> > and 60000 which resulted in some pretty weird behavior:
> >
> > at values below 26000 the rate (also confirmed via dstat output) stayed
> > low.  2-3MB/s.  At 26000 and up, the value jumped more or less instantly
> > to 70-74MB/s. What makes 26000 special? If I set the value to 20000 why
> > do I still get 2-3MB/s actual?


> You want to use sync_speed_min.

I forgot to say I changed the values of sync_speed_min.


--
Jon Nelson <[EMAIL PROTECTED]>
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