Thanks Andy. Do you know what happens to a RefenceProperty that has already
had the referenced entity "loaded" on the Model instance? Does the
referenced entity also get saved in the ProtocolBuffer, or is only its key
saved?


On 5 February 2010 16:54, Andy Freeman <ana...@earthlink.net> wrote:

> Note that memcaching a protocol buffer has interesting consequences.
> One is that the auto-now datetime properties are updated when the
> protocol buffer is created.  This update is just on the protocol
> buffer - it doesn't affect the datastore copy.
>
> http://code.google.com/p/googleappengine/issues/detail?id=2402
>
> On Feb 4, 8:11 am, Sylvain <sylvain.viv...@gmail.com> wrote:
> > I think the answer (and more) is here :
> http://blog.notdot.net/2009/9/Efficient-model-memcaching
> >
> > On Feb 4, 10:43 am, Nickolas Daskalou <n...@daskalou.com> wrote:
> >
> >
> >
> > > Is it better/safer to store a Model instance into Memcache directly
> (Method
> > > 1 below), or should we convert it to a protocol buffer first, then
> store it
> > > (Method 2 below)?
> >
> > > Method 1:
> >
> > > memcache.set(cache_key, entity)
> > > ...
> > > entity = memcache.get(cache_key)
> >
> > > Method 2:
> >
> > > memcache.set(cache_key, db.model_to_protobuf(entity))
> > > ...
> > > entity = db.protobuf_to_model(memcache.get(cache_key))
> >
> > > I'm assuming Method 2 results in a smaller Memcache footprint, yes?
> >
> > > Nick- Hide quoted text -
> >
> > - Show quoted text -
>
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