[OSRM-talk] Route flapping / osrm-prepare adds randomness?

[Florian Lohoff]

On Wed, Jul 01, 2015 at 10:45:36AM +0200, Florian Lohoff wrote:
> On Tue, Jun 30, 2015 at 08:23:30PM +0200, Frederik Ramm wrote:
> > Hi,
> > 
> > On 06/30/2015 03:43 PM, Florian Lohoff wrote:
> > > Okay - i am brute forcing it now with a smaller planet extract and
> > > find disturbing results.
> > 
> > Can you exclude a RAM defect? If you do 100 iterations of "copy large
> > file to other large file, compare md5 sums", do you get a consistent value?
> 
> The machine is doing a lot of other stuff - A Postgres, an OSM Task
> Manager etc - Its an Intel Blade in an Modular Server Blade Rack.
> 
> I dont think its memory defect. But i can try running memtest on it ...

memtest86+ ran for 30 Minutes without an issue. 16GB ECC Memory Intel
P5000 Chipset with Intel Xeon CPUs.

dd if=/dev/urandom of=rfile1 bs=1M count=16000
md5sum rfile1
2a806948021ffd7ef19c272bc3f88508  rfile1
while true; do cp rfile1 rfile2; sync; md5sum rfile2; done 
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2
2a806948021ffd7ef19c272bc3f88508  rfile2

Ja - ich schliesse Speicherprobleme aus.

Flo
-- 
Florian Lohoff                                                 f at zz.de
     We need to self-defense - GnuPG/PGP enable your email today!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 828 bytes
Desc: Digital signature
URL: <http://lists.openstreetmap.org/pipermail/osrm-talk/attachments/20150701/e55fe00e/attachment.sig>