See http://code.google.com/p/googleappengine/issues/detail?id=1084, especially the May 12 comment.
On Sep 22, 2:48 am, "Nick Johnson (Google)" <[email protected]> wrote: > Hi Neves, > Entities are stored in Protocol Buffer format, which is detailed > here:http://code.google.com/apis/protocolbuffers/docs/encoding.html > > You can get the encoded Protocol Buffer for an entity by calling > db.entity_to_proto(x).Encode(), which will return a binary string - the > length of this is the size of it in the datastore. Unfortunately, there's > not currently any way to reliably measure index size, or total overhead. > > -Nick Johnson > > > > > > On Fri, Sep 18, 2009 at 6:17 AM, Neves <[email protected]> wrote: > > > How can I calculate how much data my model will use? > > for example, a long field is 8 bytes long? > > A key field hash is always a 40 bytes length? > > What about indexes? > > > Supose I have a model like this, with no special index: > > class Space(db.Model): > > x = db.IntegerProperty() > > y = db.IntegerProperty() > > z = db.IntegerProperty() > > > 1000 records like this would have: > > > 1000 * (3*8) * 40 = 960,000 bytes > > > What about the index size? > > -- > Nick Johnson, Developer Programs Engineer, App Engine > Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: > 368047- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
