You have to explicitly set eventually consistent to get that behavior. Note that ancestor queries are also strongly consistent. This is detailed in the docs: http://code.google.com/appengine/docs/java/datastore/hr/#Data_Storage_Options_Compared
Robert On Tue, Feb 14, 2012 at 12:51, Leandro Rezende <[email protected]> wrote: > im confused now =( > > so, even GetObjectById can return Old Data? > > Jeff said "If you access the datastore in ReadPolicy.Consistency.EVENTUAL > mode...", > > Is this something i have to "Set"? to all access become > "ReadPolicy.Consistency.EVENTUAL" or its just the way im coding.. > > Thanks again. > > > 2012/2/14 Jeff Schnitzer <[email protected]> >> >> Officially, there is no guaranteed upper bound for queries to become >> consistent. In practice it's usually a second or two, but infrastructure >> failures could in theory extend the period to minutes or hours or (gasp) >> days. >> >> One thing worth noting: If you access the datastore in >> ReadPolicy.Consistency.EVENTUAL mode, get-by-id will be eventually >> consistent just like queries. And it's *dramatically* faster, ~1/5 latency >> in my recent experiments. >> >> Jeff >> >> >> On Tue, Feb 14, 2012 at 12:15 PM, Mahron <[email protected]> wrote: >>> >>> get_by_id or GetObjectbyID are supposed to always be consistent. >>> Basically all Items returned by query or id are up to date. If it is >>> not, there is a serious problem. >>> >>> "Sometimes the Query returns the value updated, sometimes not." By >>> that I suppose it does not return the entity at all. If it returns a >>> version different than after the last Put(), then I am pretty sure >>> that's a bug. >>> >>> -- >>> 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. >>> >> >> -- >> 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. > > > -- > 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. -- 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.
