I've found the Yahoo paper from 2010 to be the best distillation of the general problem of feed following and how to solve it (blending push/pull as you say):ht

I've found the Yahoo paper from 2010 to be the best distillation of the general problem of feed following and how to solve it (blending push/pull as you say):http://jeffterrace.com/docs/feeding-frenzy-sigmod10-web.pdf http://jeffterrace.com/docs/feeding-frenzy-sigmod10-web.pdf