On Thursday, 27 December 2012 01:27:47 UTC+13, aschmid wrote: > > even if a property is not indexed is needs to be written to the datastore > so it costs 1 write instead of 2 (one to the datastore and one to the > index). >
Unindexed properties do not cost anything to write. They are included in the one write operation that writes the entity data. Basically, all properties are serialised and written as a single opaque unit. It costs no more to write 1000 unindexed properties as 1 - however the latency to read and write will be higher which will cost you in terms of instance hours. An indexed property costs 2 writes because each index (ASC, DESC) is a separate write. > > vlad UNEXISTING props do not add any write cost ;) > > What do you mean by UNEXISTING? Be careful here because null values will also cost 2 writes if they are indexed. Twig (prob also Objectify) can be configured store null values as indexed or not indexed (also or stored or not stored) while still storing non-null values. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/SDxdWsxYrC4J. 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.
