MYSQL general tablespace

--从mysql 5.7.6 开始其支持 general tablespace，其可以创建在一个相对路径或绝对路径上--A general tablespace is a shared tablespace, similar to the system tablespace. It can hold multiple tables,--and supports all table row formats. General tablespaces can also be created in a location relative to or independent of the MySQL data directory--创建表空间是必需指定数据文件名（只支持一个数据文件），且以 .db 为后缀--the data file name must have a .ibd extension. An InnoDB general tablespace only supports a single data file--创建表空间CREATE TABLESPACE test_ts ADD DATAFILE '/tmp/testts.ibd' ENGINE=INNODB;--FILE_BLOCK_SIZE只在存储压缩表时才必需，注意压缩表和非压缩表不能在同一个表空间中--The FILE_BLOCK_SIZE setting is only required if you will use the tablespace to store compressed InnoDB tables (ROW_FORMAT=COMPRESSED).--If FILE_BLOCK_SIZE is equal innodb_page_size, the tablespace can only contain tables with an uncompressed row format (COMPACT, REDUNDANT, and DYNAMIC row formats). --Tables with a COMPRESSED row format have a different physical page size than uncompressed tables.--Therefore, compressed tables cannot coexist in the same tablespace as uncompressed tables--没有指定 FILE_BLOCK_SIZE，不能存储压缩表mysql> CREATE TABLE t1 (c1 INT PRIMARY KEY) TABLESPACE test_ts ROW_FORMAT=COMPRESSED;ERROR 1478 (HY000): InnoDB: Tablespace `test_ts` cannot contain a COMPRESSED table--修改表空间属性mysql> drop tablespace test_ts;Query OK, 0 rows affected (0.04 sec)mysql> CREATE TABLESPACE test_ts ADD DATAFILE '/tmp/testts.ibd' FILE_BLOCK_SIZE=8192 ENGINE=INNODB;Query OK, 0 rows affected (0.14 sec)mysql> CREATE TABLE t1 (c1 INT PRIMARY KEY) TABLESPACE test_ts ROW_FORMAT=COMPRESSED;Query OK, 0 rows affected (0.71 sec)--当表空间中有表存在时，必需先清空表，才能删除表空间--Use DROP TABLESPACE to remove a general tablespace. All tables must be dropped from a general tablespace using DROP TABLE prior to dropping the tablespacemysql> drop tablespace test_ts;ERROR 1529 (HY000): Failed to drop TABLESPACE test_tsmysql> drop table t1;Query OK, 0 rows affected (0.25 sec)mysql> drop tablespace test_ts;Query OK, 0 rows affected (0.01 sec)--Tables with a COMPRESSED row format have a different physical page size than uncompressed tables.mysql> CREATE TABLE t2 (c1 INT PRIMARY KEY) TABLESPACE test_ts ROW_FORMAT=DYNAMIC;ERROR 1478 (HY000): InnoDB: Tablespace `test_ts` uses block size 8192 and cannot contain a table with physical page size 16384--If FILE_BLOCK_SIZE is equal innodb_page_size, the tablespace can only contain tables with an uncompressed row format (COMPACT, REDUNDANT, and DYNAMIC row formats)mysql> CREATE TABLESPACE test_ts ADD DATAFILE '/tmp/testts.ibd' FILE_BLOCK_SIZE=16384 ENGINE=INNODB;Query OK, 0 rows affected (0.09 sec)mysql> show variables like '%page_size%';+------------------+-------+| Variable_name    | Value |+------------------+-------+| innodb_page_size | 16384 || large_page_size  | 0     |+------------------+-------+mysql> CREATE TABLE t2 (c1 INT PRIMARY KEY) TABLESPACE test_ts ROW_FORMAT=DYNAMIC;Query OK, 0 rows affected (0.07 sec)mysql> CREATE TABLE t1 (c1 INT PRIMARY KEY) TABLESPACE test_ts ROW_FORMAT=compressed;ERROR 1478 (HY000): InnoDB: Tablespace `test_ts` cannot contain a COMPRESSED table