On Wed, Apr 23, 2008 at 7:54 AM, Frederik Ramm <[EMAIL PROTECTED]> wrote:
> Hi, > > > Since the minute-diff was introduced OSMXAPI has been running, on > > average, about 6 minutes behind the main database. > > Sigh, this project is too large already for one person to keep the > overview. Minute diffs you say. Hadn't heard of them until now, thanks > ;-) I really should do some more advertising, this has come up a few times now :-) I've also created tasks for populating a PostGIS "simple" schema which is useful for maintaining a local replica of OSM data. Latest SVN osmosis has tasks for merging changesets into it so you could in theory have a PostGIS database kept within 6 minutes of the main API. It should be very efficient at serving bounding boxes although only real-world testing will confirm this. There's still a few TODOs in terms of keeping a database in sync that only stores a subset of the planet, at the moment I can only apply whole planet diffs. > > > > IMHO this is good enough for all purposes, except editing, which > > obviously needs to act on the live data. > > Have you had a chance to compare the result from a week's worth of > minute diffs with the planet? Is it considered safe to work on the > diffs alone, or still recommended to re-synchronize with the planet > once a week? I'm not aware of any issues but will be interested if people detect problems. The reason osmxapi lags by 6 minutes is because I have osmosis set to only read data that is at least 5 minutes old. This could be dropped further but there's a risk of long running inserts having an old timestamp and getting missed. Shouldn't happen most of the time but if a long running query locks a table it is possible. > > > Bye > Frederik > > -- > Frederik Ramm ## eMail [EMAIL PROTECTED] ## N49°00'09" E008°23'33" > > > _______________________________________________ > dev mailing list > [email protected] > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev >
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