Hi Aswanth I am a beginner wrt 'Entity Groups', but here are my thoughts and questions from what I got to know from Documentation and others. (I may be wrong.)
1. Are you sure concurrent requests for a single tenant for ur app is going to stay within 3-5 for long or for ever? 2. Documentation suggests to use Entity Groups only when they are needed for Transactions. So have you did enough analysis on what transactional boundaries you are going to apply on your entities? Are those analysis in sync with your plan of placing most of the entities of a single tenant in the same entity group? 3. Are you aware that if a request is operating on the entity group of a tenant, another parallel request to operate on the same entity group of the same tenant has to _stall_ until the first transaction is over? Are you ready to make that trade-off, for any transaction support that such entity grouping offers? 4. To answer your question straight. here is a blog that has the answer: http://www.logilab.org/blogentry/5223 Quote from the blog: "There is no limit to the number of entity groups or to the number of entities per group, but because of the locking strategy, large entity groups will cause high contention and a lot of failed transactions. Since writes are expensive, not thinking about write throughput is a very bad idea when designing an AppEngine application if one want it to scale." Thanks Jagan On Jul 23, 9:05 am, aswath satrasala <aswath.satras...@gmail.com> wrote: > Hello, > I am writing a multi-tenant accounting app for SMB's. > Is there any limit on the number of entities in the entitygroup? I am > planning to put most of the entities in one entity group for each tenant. > Since my app is for SMB's, the number of concurrent users is 3-5. Hence, I > don't anticipate the loss of concurrency, even if I put most of the entities > for each tenant in the same entitygroup. > > Any suggestions > -Aswath -- 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.
