Explanation:To access the config database, connect to a mongos instance in a sharded cluster, and use the following helper: use config 5. Point out the wrong statement :
A. If a collection already has data, MongoDB automatically splits the collection’s data when you enable sharding for the collection
B. Subsequent attempts to manually create splits can lead to unpredictable chunk ranges and sizes as well as inefficient or ineffective balancing behavior
C. MongoDB creates splits only after an insert operation
D. None of the mentioned
Answer:A
Explanation:To access the config database, connect to a mongos instance in a sharded cluster, and use the following helper: use config 5. Point out the wrong statement :
A. If a collection already has data, MongoDB automatically splits the collection’s data when you enable sharding for the collection B. Subsequent attempts to manually create splits can lead to unpredictable chunk ranges and sizes as well as inefficient or ineffective balancing behavior C. MongoDB creates splits only after an insert operation D. None of the mentioned
Explanation:The default behavior suppresses the detailed chunk information if the total number of chunks is greater than or equal to 20. 6. __________ splits the chunk that contains the shard key value specified by the query at the chunk’s median point.