[OSM-dev] Hourly Diffs

[Brett Henderson]

Frederik Ramm wrote:
> Hi,
>
>> Would anybody be able to make use of them?  Any process that creates new
>> planet files is probably best served by the existing daily changesets.
>> But if an application can use changesets directly (eg. to keep a
>> database up to date) they may be useful.
>
> A prime application for this would of course be Osmxapi, unless it 
> takes a significant portion of an hour to apply one of these diffs 
> and/or makes the system inconsistent or slow while being applied.
Cool, I didn't know if it applied diffs directly or not, I hadn't gotten 
around to asking yet :-)

The hourly diffs are (obviously) much smaller than the daily diffs which 
should help somewhat.  Uncompressed they appear to be under 50MB.

These diffs are now created by osmosis itself rather than using external 
shell scripts.  As a result I can vary the interval anywhere down to one 
second granularity with a simple config file update, so if smaller files 
help it is easy to achieve.