On Fri, Jun 19, 2009 at 11:53 AM, Steve Hosgood <[email protected]> wrote:
> 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 Yes, a full resynchronisation does get performed periodically, but not yet routinely. There was some discussion a while back about maintaining record counts or checksums or something so that the integrity of any mirror database (XAPI, TRAPI, ROMA, etc) could be verified. It's a good idea but I don't think anything has been done yet. 80n
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