☛ Allow them explain and go into detail about the problem as well as the solution.
☛ Why was it a problem ?
☛ How did you fix it?
☛ Was it a revenue dependent emergency fix?
☛ Did the problem reappear or stay fixed ?
Tell me should I start out with sharded or with a non-sharded MongoDB environment?
Tell me when will data be on more than one shard?
Explain how does sharding work with replication?
Explain do I have to call getLastError to make a write durable?
What is a secondary or slave?
What is a master or primary?
Explain how long does replica set failover take?
How to do transactions/locking?
Tell me why are my data files so large?
Does an update fsync to disk immediately?
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