Hi,
I've created two simple classes which I want to use in an entity
group:
class User {
int numReports;
}
class Report {
}
the User object will always be the parent, Report instances are part
of a User's entity group. There can be many Report objects per User:
User
|--- Report
when I save a Report instance, I want to increment the 'numReports'
counter in the User object, in a transaction. This arrangement works
fine.
But as the # of Report instances increase, does app engine have to
lock all other Report instances in the same entity group before
performing the transaction? I'm worried that performance will degrade
as the # of Report objects per User increases.
Thanks
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