On Dec 11, 1:18 pm, yejun <yej...@gmail.com> wrote: > Basically, I think during concurrent tractions, the first one commit > will win, the rest all fail. Non transaction operation will always > success. Write is always transactioned.
correct. the python API retries transactions when they collide, though, and the datastore itself retries writes when they collide, so your app will generally only see collisions (in the form of TransactionFailedError exceptions) during periods of very high contention when all retries fail. --~--~---------~--~----~------------~-------~--~----~ 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-appengine@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 -~----------~----~----~----~------~----~------~--~---
