Reset ID's auto increment value

[Vincent]

Hi everyone,

I am using a value based on key().id() in an order tracking system.
IDs on my local dev_appser currently start at 0 but IDs on the
production server start at 6000 and get incremented by 1 on insert.

Is there a way to reset the counter so new IDs start at 0?

[Nick Johnson]

Hi Vincent,

That's not currently possible, unfortunately. Though it might be
offered in future, it's important to bear in mind that no guarantee of
sequentiality is made for the automatic IDs, only that they'll be
unique. Because your app may run on multiple servers, it's entirely
possible that you'll get IDs out of sequence, or that large ID ranges
will be skipped. If it's important to you that IDs be small, or
sequential, you may want to implement your own assignment scheme.

-Nick Johnson

[Sylvain]

Create an index for that.
Check these slides (Building a blog) :
http://sites.google.com/site/io/building-scalable-web-applications-with-google-app-engine