what about "created" tags? they are pretty much useless too.<div>2G difference on the uncompressed planet file. <br><br><div class="gmail_quote">On Tue, Jul 21, 2009 at 10:48 AM, Andy Allan <span dir="ltr"><<a href="mailto:gravitystorm@gmail.com">gravitystorm@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On Tue, Jul 21, 2009 at 3:38 PM, Frederik Ramm<<a href="mailto:frederik@remote.org">frederik@remote.org</a>> wrote:<br>
> Hi,<br>
><br>
> Andy Allan wrote:<br>
>><br>
>> Tiger node tags make up 85.43% of all node tags and take up:<br>
><br>
> [...]<br>
><br>
> I just did a little test, prepared an .osc document that removed the node<br>
> tags from about 1000 nodes:<br>
><br>
> <a href="http://www.openstreetmap.org/browse/changeset/1894387" target="_blank">http://www.openstreetmap.org/browse/changeset/1894387</a><br>
><br>
> It came out at roughly 10 node changes per second. I count 177m nodes with<br>
> TIGER tags, which means that the whole process would take about 200 days on<br>
> one API thread. It might be slightly faster if you upload larger or smaller<br>
> chunks - would have to do some experimenting to find the sweet spot. Time<br>
> could also be saved by running it one the LAN (on dev), but again probably<br>
> not a lot.<br>
<br>
</div>Ah, good stuff. I was assuming the best way to do it was a script on<br>
dev doing 50,000 nodes at a time (i.e. max diff upload) when it came<br>
to hitting the sweet-spot, but I'm interested in your experiments.<br>
<br>
Like you, I'm a bit concerned about the side effects of creating x<br>
billion changesets, but for replication, verification etc it's nice to<br>
behave nicely (i.e. through the API). But that just gives everyone an<br>
added incentive to stop other people doing ill-constructive bulk<br>
imports in the first place! The sooner we can clear this from TIGER<br>
the fewer people will use it as an example to aim for.<br>
<br>
Cheers,<br>
<font color="#888888">Andy<br>
</font><div><div></div><div class="h5"><br>
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</div></div></blockquote></div><br></div>