If you consider for a moment that *all* of the rows for all of our
applications are stored in one big logical BigTable, an extra 500
million is probably a drop in the bucket.

On the other hand, GAE has a limit of 1MB for any single entity.
3.5TB / 500M rows is about 7MB per entity, so that's not going to
work.  Also realize that 3.5TB will over $500/mo just for storage.

Jeff

On Mon, Apr 19, 2010 at 11:59 AM, sunsu <lylepr...@gmail.com> wrote:
> Hi guys,
>
> I'm wondering if its possible for me to create a datastore on Google's
> App engine that could feasibly grow to over 500 million rows
> (entries). It would be all text (json blobs really), so I don't think
> each entry would take up all that much space. I'm thinking if it were
> to actually grow to be that big, It would be about 3.5 terabytes of
> data (??).
>
> To give a little background: I'm thinking about making a game in which
> the universe is made of a series of tilemaps. In order to create it at
> the scale that I would like, I'll need to (eventually...because the
> world would grow as people explored) store data for about 500 million
> tilemaps :D.
>
> Would querying a datastore with 500 million rows even work relatively
> quickly on Google's App Engine (assuming it was properly indexed)?
>
> Thanks for the input,
> Sunsu
>
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