I have tried multiple times to find out EXACTLY what function uses the small datastore operation. I have asked in this group for the info. I usually get referred to the billing page that explains that small datastore operations are cheaper which was the reason I was asking the question. I notice this thread has a link to the billing page .. a fine page indeed ... but good luck finding what datastore function is used for small datastore operation.
The gigantic disappointment is that reading an entity using its id is not a small datastore operation ... I would think it should be ... instead it is the regular kind of nasty read which is actually two read operations. Thus, there is no such think as a single read operation. It seems mostly pointless to allocate keys without putting values in the entity, but there you go. Thanks ps. Time to send me the link to the billing page ... Key allocation (per key) On Feb 10, 3:10 am, Brian Quinlan <[email protected]> wrote: > On Fri, Feb 10, 2012 at 9:03 PM, poke <[email protected]> wrote: > > thanks . > > finally pm.getObjectById() is Entity Get ? > > Yes, you are loading the contents of a datastore entity. > > Cheers, > Brian > > > > > > > > > > > On Feb 10, 4:05 pm, Brian Quinlan <[email protected]> wrote: > >> On Fri, Feb 10, 2012 at 7:53 PM, poke <[email protected]> wrote: > >> > Few days ago , i change my code to access by key (not by query) . But > >> > in Billing report "Small Datastore Operations " still equal zero and > >> > "Datastore Reads " same as using query - billing not go to down. > > >> > JDO pm.getObjectById() method still count as Datastore Reads > > >> Gets still cost a read operation. > >> See:http://code.google.com/appengine/docs/billing.html > > >> Entity Get (per entity): 1 Read > >> Query: 1 Read + 1 Read per entity returned > > >> Cheers, > >> Brian > > >> > -- > >> > 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 > >> > athttp://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 > > athttp://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.
