Question
a.
Use sharded clusters if your data set approaches or exceeds the storage capacity of a single MongoDB instance
b.
Use sharded clusters if a single MongoDB instance can meet the demands of your write operations, and all other approaches have not reduced contention
c.
Use sharded clusters if the size of your system’s active working set will soon exceed the capacity of your system’s minimum RAM
d.
All of the mentioned
Posted under Sharding Concepts and Sharded Cluster MongoDB
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