More than one or two sort orders will drastically increase the number of indexes you need to create, particularly if you're using range queries too. In the scenario you've described I would highly recommend duplicating your data into the SearchService and running searches on that. This will allow you to just use keys/ids for datastore lookups.
I usually index a couple of basic fields for operational queries through the admin console. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/groups/opt_out.
