MongoDB Map-Reduce 应该在什么时候做?

linjunpop · May 22, 2012 · Last by lainuo replied at May 22, 2012 · 2546 hits

请问一下,这种类型的操作,在 Rails 里应该放在哪里?

http://cookbook.mongodb.org/patterns/count_tags http://markembling.info/2010/11/using-map-reduce-in-a-mongodb-app

放在 cron 里吧,Mongo 的 M/R 做实时不是很快。

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