[sheepdog] [PATCH] test: Implentment fast random on AES

[MORITA Kazutaka]

At Mon, 06 May 2013 16:24:39 +0800,
Liu Yuan wrote:
> 
> On 05/06/2013 04:15 PM, Joseph Glanville wrote:
> > +    _random | dd bs=1M | $COLLIE vdi write test$i -p 7000 &
> 
> 'dd bs=1M' is redundant? I can't still pass the tests with your patch
> yet. Still sees 'error writing output file' error

I think it is because openssl fails to write data to stdout because collie vdi
write has exited.  If so, we can safely ignore the error message.

I've tried the following simpler version.  It looks working correctly without dd
and shows much better performance than /dev/urandom on my environment.

==
_random()
{
    openssl enc -aes-256-ctr -pass pass:"$(date)" -nosalt < /dev/zero 2>/dev/null
}
==

Thanks,

Kazutaka