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A comment on Why I Migrated Away From MongoDB. Parent comment

Re:Why I Migrated Away From MongoDB by edwardcapriolo on Monday September 17, 2012 @01:51PM (#4533813)
MongoDB is not even remotely close big table architecture. It has a different data model and a different sharding model, and just about a different everything.
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Re:Why I Migrated Away From MongoDB by stingraycharles on Tuesday September 18, 2012 @09:56AM (#4537970)
I know that MongoDB is very different in architecture from BigTable (as opposed to HBase and BigTable, for example), but I always understood that the fundamental way they choose to assign and lookup regions to regionservers (or, in mongodb terminology, shards and shard servers) was based on the BigTable architecture.

Could you elaborate on the differences in the sharding model between the two?

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