[OSM-dev] Merging Changes into Planet

[Maarten Deen]

On Thu, 14 Jul 2011 12:38:02 +0100, Andrew Ayre wrote:

> With my 766MB change file the original merge command that I posted 
> takes
> 106 minutes.
>
> By using Jochen's merge command with buffers and the same change file 
> it
> now takes 58 minutes!
>
> I knew about the possibility of buffers but I never tried them 
> because
> [1] appeared quite negative regarding them. Maybe it is out of date?

Benchmarking complex processes like this usually generate results that 
are very much tied to the configuration you benchmark with. As it says 
in the conclusion "That is not to say it won't help in different 
applications or with different setups".
It was tested with a very old version of osmosis (0.24 while 0.38 was 
already out) and maybe you are using a different type or make of 
processor.

> [1] http://wiki.openstreetmap.org/wiki/Osmosis/Benchmarking

I'm sure adding your observations will be a valuable addition.

Regards,
Maarten