page size要相同.When importing a tablespace, the page size must match the page size of the importing instance.
Prior to MySQL 5.7.4, DISCARD TABLESPACE is not supported for partitioned tables meaning that transportable tablespaces is also unsupported. If you run ALTER TABLE … DISCARD TABLESPACE on a partitioned table, the following error is returned: ERROR 1031 (HY000): Table storage engine for ‘part’ doesn’t have this option. As of MySQL 5.7.4, ALTER TABLE … DISCARD TABLESPACE is supported for partitioned InnoDB tables, and ALTER TABLE … DISCARD PARTITION … TABLESPACE is supported for InnoDB table partitions.
The ability to import without a .cfg file may be more convenient when no schema mismatches are expected. Additionally, the ability to import without a .cfg file could be useful in crash recovery scenarios in which metadata cannot be collected from an .ibd file.