Thanks Tim,

It's great help to me.


Best Regards
Tom Wu


2010/9/12 Tim Hoffman <zutes...@gmail.com>

> Keys won't change if you restore into the appid.  They must change if
> you restore to a new appid as the appid is part of the key.
>
> T
>
> On Sep 11, 11:59 pm, Tom Wu <service.g2...@gmail.com> wrote:
> > Is any possible without key changing after restoring my data in same app
> ?
> >
> > Best Regards
> > Tom Wu
> >
> > 2010/9/11 Tim Hoffman <zutes...@gmail.com>
> >
> >
> >
> > > Hi
> >
> > > In theory reference properties should be ok, (list properties holding
> > > a list of keys - especially as strings would have a problem).
> >
> > > Have you compared the key in the reference property and the key of the
> > > target before and after the restore.
> > > It may be because you using id's rather than key names?  But I am not
> > > sure without running some tests.
> >
> > > I would work out what is being changed and you may find a custom
> > > loader for bulkloader may be required to move your
> > > dataset between appids.
> >
> > > T
> >
> > > On Sep 11, 10:24 pm, Francois MASUREL <masu...@mably.com> wrote:
> > > > Yep, I was restoring to another appId.
> >
> > > > Does that mean that when you're storing entity keys as a "reference"
> > > > property you can't backup/restore to another appId ?
> >
> > > > What is the best practice then ?  Should we create some kind of
> generated
> > > > UUID and use it as key for our entities then ?
> >
> > > > François
> >
> > > > On Sat, Sep 11, 2010 at 16:17, Tim Hoffman <zutes...@gmail.com>
> wrote:
> > > > > As to the keys changing, where you restoring to an instance with
> the
> > > > > same appid ?
> >
> > > > > If not the keys have to change, and you might find problems where
> you
> > > > > store keys in list properties.
> >
> > > > > T
> >
> > > > > On Sep 11, 10:12 pm, Tim Hoffman <zutes...@gmail.com> wrote:
> > > > > > Hi
> >
> > > > > > I am actually using appcfg.py download_data and upload_data with
> > > great
> > > > > > success with 65,000 entities.
> >
> > > > > > Which is pretty much the same thing.
> >
> > > > > > I have found you may need to play around with the batch size
> settings
> > > > > > if you have particularly large entities.
> >
> > > > > > T
> >
> > > > > > On Sep 11, 10:01 pm, Francois Masurel <fm2...@mably.com> wrote:
> >
> > > > > > > Hello everybody,
> >
> > > > > > > I've tried to do a full bulkloader --dump and --restore of one
> app
> > > to
> > > > > > > another one and it failed miserably.
> >
> > > > > > > First, I had a quite a few "Backing off" errors during export
> which
> > > > > > > took more than 30 minutes for about 6000 small entities.
> >
> > > > > > > Then when I restored it, I lost about 1000 entities it said it
> > > > > > > couldn't restore without explanations.
> >
> > > > > > > And then I realized that all entities keys had been changed.
>  So
> > > all
> > > > > > > my relations between entities were lost.
> >
> > > > > > > Did I do something wrong ?
> >
> > > > > > > Thanx for your help.
> >
> > > > > > > Francois
> >
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