buildworld

[Warner Losh]

So fast SD cards run about 5-10MB/s write speed, a little more read.
SSDs are 100x faster than that, typically (300MB/s read, 400MB/s
write are typical values). USB 2.0 is 480Mbps or 48MB/s (in
practice more like 20-30MB/s), so even a USB attached drive is going
to be 6x faster than a fast SD card. Note: I’ve not measured any
of these rates from an RPi B, mind you, so YMMV.

Slow SD cards can be 10x slower or worse than faster ones.
Especially with UFS since it’s a rewrite in place FS.

Thumb drives are little better than SD cards here, alas.

That’s a long way of saying that a good USB + SSD or USB +
HDD would cut your buildworld time substantially. At a guess,
by a factor of 4-8 to between 5-10 hours.

Good luck with your installworld.

Warner


> On Feb 28, 2015, at 12:55 PM, Brett Wynkoop <freebsd-arm at wynn.com> wrote:
> 
> 
> mv routing_test.tmp routing_test
> 
> --------------------------------------------------------------
>>>> World build completed on Sat Feb 28 06:45:32 EST 2015
> --------------------------------------------------------------
> 
> 
> So it took just over 48 hours.  It also proves that removing the
> make.conf was the right move.  Good stuff!
> 
> Now to see if I can installworld without crashing the little box.
> 
> -Brett
> 
> --
> 
> wynkoop at wynn.com               http://prd4.wynn.com/wynkoop/pgp-keys.txt
> 917-642-6925
> 929-272-0000
> 
> I would never invade the United States.  There would be a gun behind
> every blade of grass.  --Isoroku Yamamoto
> 
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