On Fri, May 24, 2013 at 7:33 PM, John Wheeler wrote:

>
> It would be best if deletes were extremely cheap - give developers the
> ability to do them at cost so they're not afraid to experiment on App Engine
>

What makes you think they are not close to 'cost' already?

You seem to be assuming deletes are absurdly 'marked up' - for what ever
reason.

Why would Google doe that?


Deleting at 'scale' is not cheap. Your data is replicated around. All those
copies have to be found and 'deleted'. The indexes are seperate and have to
be deleted too. There may be many.

In fact most of the time the data isn't actually deleted. Just Tombstoned.
Marked as deleted, so the space is not actually reclaimed right away (to be
sold again). Would be to much work to remove the 'holes' all the time.

The space will probably be reclaimed eventually, when the tablets are
compacted. But not right away


In fact when a Application is deleted, wouldnt be surprised if Google don't
jsut absorb the storage cost, and not actully bother deleting the data.
Deletions will be relativly rare, and few will leave large amounts of data
lying around. Will just be orphaned and ignored.

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