Explanation:In a replica set, the set can have at most one primary and only the primary can accept write operations. 8. When ______________ is true, the mongod instance saves all documents migrated from the shard to the moveChunk directory of the storage.dbPath.
A. sharding.archiveChunks
B. sharding.archiveMovedChunks
C. shards.archiveMovedChunks
D. rs.syncFrom()
Answer:A
Explanation:In a replica set, the set can have at most one primary and only the primary can accept write operations. 8. When ______________ is true, the mongod instance saves all documents migrated from the shard to the moveChunk directory of the storage.dbPath.
A. sharding.archiveChunks B. sharding.archiveMovedChunks C. shards.archiveMovedChunks D. rs.syncFrom()
Explanation: MongoDB does not delete data stored in moveChunk. 9. Replication _______ is a delay between an operation on the primary and the application of that operation from the oplog to the secondary.