You'll have to create a descending index. We're tracking some
inconsistencies with bulk built custom indexes at the moment, so if you see
weirdness (e.g. value appears in ascending order but not descending order)
please report it:
http://code.google.com/p/googleappengine/issues/detail?id=2481

On Sat, Dec 12, 2009 at 2:41 AM, Ubaldo Huerta <[email protected]> wrote:

> While using the bulkloader --dump I get the "No descending index on
> __key__, performing serial download" warning of sorts. The dump
> occurs, and reasonably "fast". However, I thought I didn't have to
> explicitly create this index on __key__, that this index was
> implicitly created like an index on any property. I guess I'm wrong?
> Should I create this index?
>
> I hesitant to create indexes in production for experimentation because
> I've had my share of issues with indexes not building, vacuuming
> indexes acting up, etc, in the past.
>
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>


-- 
Ikai Lan
Developer Programs Engineer, Google App Engine

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