[Gllug] Thoughts on secondhand server guide price

Carles Pina i Estany carles at pina.cat
Tue Jun 16 21:45:22 UTC 2009


Hi,

On Jun/16/2009, Andy Millar wrote:
> > /dev/urandom is a bit faster than /dev/random (usually)
> 
> And a little bit less secure :-)

right (and I had to mention it), but a nice balance between /dev/zero
and /dev/random.

In my system, cat /dev/random gets stalled after some bytes (I think
that I'm not good generating entropy :-) ) and /dev/urandom is quite
fast :-):

carle at pinux:~$ dd if=/dev/urandom of=/dev/null bs=1k count=10000
10000+0 records in
10000+0 records out
10240000 bytes (10 MB) copied, 3.06004 s, 3.3 MB/s
carles at pinux:~$ dd if=/dev/zero of=/dev/null bs=1k count=10000
10000+0 records in
10000+0 records out
10240000 bytes (10 MB) copied, 0.016452 s, 622 MB/s
carles at pinux:~$ dd if=/dev/random of=/dev/null bs=1k count=10
0+10 records in
0+10 records out
105 bytes (105 B) copied, 38.6765 s, 0.0 kB/s
carles at pinux:~$ 

Using random in my desktop system (now only playing some music, I agree)
would take endless...

-- 
Carles Pina i Estany
	http://pinux.info
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