Ikai, Just wanted to double check, it is 10 concurrent RPCs but only 5 concurrent transactions?
Robert On Wed, Jun 22, 2011 at 23:35, Ikai Lan (Google) <[email protected]> wrote: > Thank you for this! > A few notes: > 1. If you do "ancestor queries" where you set an entity group root, that > query will be strongly consistent. > 2. Get by ID happens transactionally. Currently, I think we only allow each > request to have 5 outstanding transactions, so if you do a batch get by ID > of, say, 500 entities, this will run about as fast as if you performed 100 > fetches serially. To get around this behavior, set the "eventual > consistency" flag to true in your datastore client. Note that this will > cause your data to exhibit eventual consistent behavior like in point 1 - > clever Memcaching should mostly hide the issue from users. We're working on > ways to improve this, but for the time being you'll need to be aware of it. > Ikai Lan > Developer Programs Engineer, Google App Engine > Blog: http://googleappengine.blogspot.com > Twitter: http://twitter.com/app_engine > Reddit: http://www.reddit.com/r/appengine > > > On Thu, Jun 23, 2011 at 10:44 AM, Greg <[email protected]> wrote: >> >> Hi - >> >> I have previously posted about a MS-HR migration how-to here: >> >> >> http://neogregious.blogspot.com/2011/04/migrating-app-to-high-replication.html >> >> I've now followed up with some lessons learned from the migration: >> >> >> http://neogregious.blogspot.com/2011/06/high-replication-migration-lessons.html >> >> Hope you find them useful. >> >> Cheers >> Greg. >> >> -- >> 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.
