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 --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
