Yes but you can hit them repeatedly and from multiple threads until
everything is deleted.
2009/4/28 Sri <sri.pan...@gmail.com>
>
> Right you mean have handlers that delete data instead of using
> remote_api?
>
> But wouldnt that limit my requests to 30 seconds (well i guess I could
> 1000 "delete 100 items" requests) right?
>
> On Apr 27, 5:09 pm, Alkis Evlogimenos ('Αλκης Ευλογημένος)
> <evlogime...@gmail.com> wrote:
> > If you don't its better to do it on the server side rather
> > than transferring data through the net.
> > No you don't need to keep the keys locally.
> >
> > 2009/4/27 Sri <sri.pan...@gmail.com>
> >
> >
> >
> >
> >
> > > But the issue is that i dont really have the keys on me... does that
> > > mean that each time i load the datastore il have to keep track of the
> > > keys as well locally.. so that when i want to clear them i can use
> > > them..
> >
> > > cheers
> > > Sri
> >
> > > On Apr 27, 8:50 am, Alkis Evlogimenos ('Αλκης Ευλογημένος)
> > > <evlogime...@gmail.com> wrote:
> > > > The sample code does:
> > > > MyModel.all().fetch(1000)
> >
> > > > This means fetch 1000 entities of MyModel. If each entity is 10kb
> this
> > > means
> > > > 10MB of data read from datastore, 10MB of data sent through the
> network
> > > to
> > > > your running instance and 10MB of data server from the running
> instance
> > > to
> > > > your machine running the remote script.
> >
> > > > If you know the keys then you can do:
> >
> > > > db.delete([db.Key.from_path('MyModel', key_name) for key_name in
> > > > one_thousand_key_names])
> >
> > > > This just sends the keys to the datastore for deletion. It doesn't
> need
> > > to
> > > > transfer data from the datastore to the remote script to read the
> keys in
> > > > the first place.
> >
> > > > Eventually GAE api should provide us some way of querying the
> datastore
> > > for
> > > > keys only instead of getting entities necessarily. This would make
> this
> > > > use-case quite a bit faster and a lot of others as well.
> >
> > > > 2009/4/26 Devel63 <danstic...@gmail.com>
> >
> > > > > Can you explain this further? I don't see any reference to
> key_name
> > > > > in the sample code.
> >
> > > > > More importantly, to me, what's the cost differential between using
> > > > > string representation of keys and key_names? I've been passing
> around
> > > > > key_names to the browser because they're shorter, under the
> assumption
> > > > > that the cost to get the corresponding key on the server side was
> > > > > negligible.
> >
> > > > > On Apr 25, 9:02 am, Alkis Evlogimenos ('Αλκης Ευλογημένος)
> > > > > <evlogime...@gmail.com> wrote:
> > > > > > Doing it over the remote api means you are going to transfer all
> your
> > > > > data +
> > > > > > transmission overhead over the wire. You are probably better off
> > > doing
> > > > > > something like this on the server side through an admin protected
> > > > > handler.
> >
> > > > > > Also if you happen to know the keys of your data (you used
> key_name)
> > > your
> > > > > > deletes are going to be a lot more efficient if you give
> db.delete a
> > > list
> > > > > of
> > > > > > keys instead.
> >
> > > > > > On Sat, Apr 25, 2009 at 2:41 PM, Sri <sri.pan...@gmail.com>
> wrote:
> >
> > > > > > > Hi,
> >
> > > > > > > Is there a way to completely erase the production data
> store?
> >
> > > > > > > Currently I am using a script like this via the remote api:
> >
> > > > > > > def delete_all_objects(obj_class):
> > > > > > > num_del = 300
> > > > > > > while True:
> > > > > > > try:
> > > > > > > objs = obj_class.all().fetch(1000)
> > > > > > > num_objs = len(objs)
> > > > > > > if num_objs == 0:
> > > > > > > return
> > > > > > > print "Deleting %d/%d objects of class %s" %
> (num_del,
> > > > > > > num_objs, str(obj_class))
> > > > > > > db.delete(objs[:num_del])
> > > > > > > except Timeout:
> > > > > > > print "Timeout error - continuing ..."
> >
> > > > > > > But with 30000 entities in the data store and another 3 million
> > > (yep
> > > > > > > thats right) coming, doing a clear this way is extremely slow.
> >
> > > > > > > Any ideas?
> >
> > > > > > > cheers
> > > > > > > Sri
> >
> > > > > > --
> >
> > > > > > Alkis
> >
> > > > --
> >
> > > > Alkis
> >
> > --
> >
> > Alkis
> >
>
--
Alkis
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