The values quoted are for all entities of the kind you're examining; the top of the screen will show how many entities there are and the average size. I believe it will be typical for metadata to be larger than the data in those cases where the data is extremely tiny. Add a few moderately-large strings to any model and the metadata % will shrink to something barely noticeable in no time.
There are certainly cloud services that use relational databases. However, disk space is very cheap, and with services like EC2 you'll probably end up paying orders of magnitude more to have the mysql server running 24/7 than you'd pay for stored metadata on App Engine. On Jul 25, 9:58 am, Mark <mar...@gmail.com> wrote: > Hi, > > I'm looking at my datastore statistics, looks like my entity > attributes are always smaller in size than their associated metadata. > For example, datastore viewer shows this for an entity of mine > (property names are shortened to reduce size required per entity): > > Storage Space by Property Type > d String 90 Bytes (9% of the entity) > ts Integer 75 Bytes (8% of the entity) > tl String 75 Bytes (8% of the entity) > u String 75 Bytes (8% of the entity) > pr Integer 50 Bytes (5% of the entity) > Metadata 588 Bytes (62% of the entity) > > I had arranged my entities in such a way as to keep them as small as > possible, but it looks like the size required by the metadata per > entity is just negating all my efforts. I understand app engine has to > serialize all the info about the entity, but I thought this would be > something more like a matter of a few bytes: > > [attribute_name + length] per attribute > > I'm worried all my disk quota is going to get eaten up fast. Does the > above look typical, and if it does, what are methods to reduce the > metadata size? > > Besides that, the Integer attributes above are plain old 'int' types, > not 'Integer', but they still require 75 bytes each? > > Are there any platforms like app engine that offer a datastore with > schemas so that all the entity info doesn't need to be serialized with > the entity? > > Thanks -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
