[OSM-dev] Missing ways on XAPI

Steve Hosgood steve at tallyho.bc.nu
Fri Jun 19 11:53:07 BST 2009


80n wrote:
> There's a problem with the minute diffs, since 0.6, caused by large 
> changesets.  The workaround is to delay them by 30 minutes, but it's 
> possible there was missing data before the problem was fully diagnosed.
>
> It's a bit of a moot problem at the moment as the main XAPI server is 
> dead.  Any new servers that come up (some are being worked on) will 
> start with a clean planet so things should be much better.
>
Ah - so you're saying that XAPI servers work from some historical planet 
file which has subsequently been modified by applying zillions of minute 
diffs from that point in history onwards are you?

So if the diff carrying info about those missing roads had got lost 
months back, those ways will remain missing on XAPI for ever (or until 
someone modifies those ways again which would presumably make them 
appear in a fresh minute diff).

If this is so I could imagine it would be a good idea for each XAPI 
server to (randomly) load itself a fresh, clean planet file from time to 
time (say once a week or once a fortnight).

Steve






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