A.db.集合名.dropIndexes()B.db.集合名.drop()C.db.集合名.indexes.drop()D.db.stus.removeIndexes()
A.無限水平擴展B.高可用性C.海量數(shù)據(jù)存儲D.低并發(fā)
A.Neo4jB.BigtableC.MySQLD.memcachedE.HDFS