Explanation:During a chunk migration, the destination shard is sent all the current documents in the chunk from the origin shard. 8. MongoDB generates _______ values upon document creation to produce a unique identifier for the object.
A. ObjectId
B. CompId
C. DoctId
D. All of the mentioned
Answer:A
Explanation:During a chunk migration, the destination shard is sent all the current documents in the chunk from the origin shard. 8. MongoDB generates _______ values upon document creation to produce a unique identifier for the object.
A. ObjectId B. CompId C. DoctId D. All of the mentioned
Explanation:Some possible shard keys will allow your application to take advantage of the increased write capacity that the cluster can provide, while others do not. 9. A shard key that increases monotonically will not hinder performance if most of your write operations are ____ operations.