We project need clustering with Mongo，I find some documents，they are not my need。
Have somebofy configure for clustering with Mongo？
Is there any particular reason you need to cluster MongoDB? The database is never really the bottleneck, MongoDB is exceptionally fast.
Yeah, might be more trouble than it's worth.. @scottalanmiller and @exodo have some experience running at scale, so they'd be good reference point for the kind of scale you're looking at
How big are you planning to go? MongoDB scales like crazy.