[OSM-dev] Distributed Data Store Follow-Up
Stefan de Konink
stefan at konink.de
Tue Mar 24 18:03:16 GMT 2009
Scott Shawcroft wrote:
> Our update performance shouldn't be too different. We simply send the
> update request to all the node machines.
And your node machines do not cache their partition results? (Thus is a
scan always required?)
> By within do you mean a bounding box query? Could you be more specific?
For bbox you will have results for this:
____
| |
| o-+--o
|____|
for within/touches you will have results for this:
____
| |
o--+----+--o
|____|
Now the above example is trivial to support the interesting case is
diagonal lines. This would allow perfect viewport calls.
Stefan
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