Are there benchmarks available for memcache reliability on GAE?

It'd be great if memcache could throw a warning or error upon a put to
memcache, if that put will cause an eviction of another value, and ask
you to retry your put with a token to confirm you're OK with the
eviction. The equivalent of a 'are you sure you want to overwrite this
value?' prompt.

On a related note, I put in a feature request for an option for a
trigger to persist memcache data to datastore upon eviction, but I
don't know if it's feasible or not :| (see:
http://code.google.com/p/googleappengine/issues/detail?id=3089&sort=-id&colspec=ID%20Type%20Status%20Priority%20Stars%20Owner%20Summary%20Log%20Component)
A warning system like the above might be more general though, but
assumes that eviction only happens because other data is pushed in
(which may not be the case - I'm guessing other scenarios cause data
eviction too).

On Apr 15, 2:14 pm, Wooble <geoffsp...@gmail.com> wrote:
> On Apr 14, 10:23 pm, Timofey Koolin <timo...@koolin.ru> wrote:
>
> > You can write your log and other tasks to memcache. In tasks or by
> > cron you can read your meny data from memcache per time and write to
> > datastore.
>
> ...if you don't mind losing your data sometimes.

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