Sharding Pitfalls Part III: Chunk Balancing and Collection Limits
Posted by: The MongoDB NoSQL Database Blog,
on 22 Oct 2014 |
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In Parts 1 and 2 we have covered a number of common issues people run into when managing a sharded MongoDB cluster. In this final post of the series we will cover a subtle, but important distinction in terms of balancing a sharded cluster as well as an interesting limitation that can be worked around relatively easily, but is nonetheless surprising when it comes up.6. Chunk balancing != data balancing != traffic balancingThe balancer in a sharded cluster cares about just one thing:Are...