Regarding the question about better performance by writing entities in different entity groups; that's not an option if you're using JDO is it, doesn't JDO require a transaction around writes?
Jason (Google) wrote: > This past Wednesday, the App Engine team hosted the latest session of > its bimonthly IRC office hours. A transcript of the session and a > summary of the topics covered is provided below. The next session will > take place on Wednesday, January 6th from 7:00-8:00 p.m. PST in the > #appengine channel on irc.freenode.net. > > - Jason > > > --SUMMARY----------------------------------------------------------- > - Q: Can one achieve better peformance by writing entities in > different entity groups outside of a transaction over writing multiple > entitites in the same entity group inside of a transaction? A: Yes! > App Engine supports batch (parallel) writes for entities in distinct > entity groups. Updates to multiple entities in the same entity group, > regardless of whether you use transactions, forces the entities to be > written serially which takes more time. In order to achieve the best > performance, keep your entity groups as small as possible and only use > transactions if you absolutely need atomic writes to two or more > entities. [9:09-9:11, 9:13-9:15] -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
