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From: Ivan Voras <ivoras@freebsd.org>
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Subject: Re: performance problem with gstripe
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Joel Jacobson wrote:
> here's what i did:

> ca-sbox-2# dd if=3D/dev/zero of=3D/dev/stripe/d0 bs=3D512k count=3D4096=

> 4096+0 records in
> 4096+0 records out
> 2147483648 bytes transferred in 34.124683 secs (62930508 bytes/sec)

> ca-sbox-2# dd if=3D/dev/zero of=3D/mnt/bigfile bs=3D512k count=3D4096 &=
&
> /usr/bin/time sync
> 4096+0 records in
> 4096+0 records out
> 2147483648 bytes transferred in 11.081184 secs (193795502 bytes/sec)


Hmm ok, you might be hitting the MAXPHYS problem. Could you try and
create your gstripe array with a stripe size of 64 kB and 32 kB and test
on those ?


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