A.Create a table

B.Delete table

C.Modify the file format

D.Add columns

A.When the number of instances n is an odd number, assuming n=2x+1, x votes are required to become the leader node

B.When Zookeeper elects a leader, more than half of the votes are required

C.When the number of instances n is an odd number, assuming n=2x+1, x+1 votes are required to become the leader node

D.When the number of instances is 8, 5 votes are required to become the leader node, and the disaster tolerance is 4

A.output

B.input settings

C.Basic Information

D.convert

A.True

B.False

A.All 4 blocks will be written to RAM_DISK

B.The first block copy will be written to RAM_DISK, the rest of the replicas are written to DISK

C.If it is a copy other than the first copy that fails to write, try to write to the storage type specified by "Alternative storage policy for copy"

D.If the first block copy is written to RAM_If DISK fails, try to write to the storage type specified by "Alternative Storage Policy"