Re: Debian server for backups of Windows clients
On Fri 09 Sep 2016 at 20:36:39 (-0700), David Christensen wrote:
> On 09/09/2016 11:51 AM, Celejar wrote:
> > On Tue, 9 Aug 2016 18:57:02 -0700
> > David Christensen <dpchrist@holgerdanske.com> wrote:
> >
> > ...
> >
> >> My laptop has 802.11 a/b/g WiFi and Fast Ethernet. Wireless data
> >> transfers are slow (~50 Mbps). Wired is twice as fast (100 Mbps); still
> >> slow. Newer WiFi (n, ac) should be faster, but only the newest WiFi
> >> hardware can match or beat Gigabit.
> >
> > You get ~50Mbps over a/b/g? 54Mbps is the theoretical maximum, and
> > everything I've read says that 20-24Mbps is the real-world maximum.
> >
> > Celejar
> >
>
> Benchmarking using WiFi (48 Mb/s):
>
> 2016-09-09 20:18:51 dpchrist@t7400 ~
> $ time dd if=/dev/urandom of=urandom.100M bs=1M count=100
> 100+0 records in
> 100+0 records out
> 104857600 bytes (105 MB) copied, 12.6709 s, 8.3 MB/s
>
> real 0m12.703s
> user 0m0.000s
> sys 0m12.481s
>
> 2016-09-09 20:19:32 dpchrist@t7400 ~
> $ time scp -p urandom.100M samba:.
> urandom.100M
>
>
> 100% 100MB 1.5MB/s 01:08
>
> real 1m16.023s
> user 0m4.548s
> sys 0m0.744s
>
>
> So, 1048576900 bytes * 8 bits / byte / 76.024 seconds
↑
What's this 9?
Cheers,
David.
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