我们知道启用innodb_file_per_table选项后，单个表(InnoDB引擎)的数据和索引放入单独的文件中(.ibd)，建表语句保存在.frm文件中
本文假设192.168.85.132,3306实例无法启动(磁盘还能访问)，需要将原实例下的replcrash.py_user表恢复到192.168.85.132,3308实例
一、.frm得到建表语句
mysqlfrm可以读取.frm文件并从该文件中找到表定义数据生成CREATE语句。在大多数情况下，生成的CREATE语句用于在另一个服务器上创建表或进行诊断等。
1.1、操作模式
默认模式，使用--basedir或者--server选项生成一个临时实例，该模式需要指定--port选项给临时实例使用，该端口不能与现有的实例冲突。在读取.frm文件后，临时实例将被关闭，所有的临时文件将被删除。
诊断模式，使用--diagnostic选项。byte-by-byte读取.frm文件，尽可能多的恢复信息。
诊断模式可能遇到的问题
• 不能解读character set/collation values，这会影响到多字节字符列大小
• 不能读取默认值
• 生成的create语句可能会有语法错误
当使用默认模式无法读取文件，或者服务器上没有安装MySQL实例时就使用诊断模式~~
1.2、mysqlfrm安装使用
1、安装 # mysql-utilities依赖mysql-connector-python >= 2.0.0 [[email protected] tools]# wget https://dev.mysql.com/get/Downloads/Connector-Python/mysql-connector-python-2.1.7-1.el6.x86_64.rpm [[email protected] tools]# wget https://dev.mysql.com/get/Downloads/MySQLGUITools/mysql-utilities-1.6.5-1.el6.noarch.rpm # 安装 [[email protected] tools]# yum localinstall mysql-connector-python-2.1.7-1.el6.x86_64.rpm -y [[email protected] tools]# yum localinstall mysql-utilities-1.6.5-1.el6.noarch.rpm -y 2、使用 # default mode # --basedir [[email protected] ~]# mysqlfrm --basedir=/usr/local/mysql/ /data/mysql/mysql3306/data/replcrash/py_user.frm --port=3333 --user=root # --server [[email protected] ~]# mysqlfrm --server=mydba:[email protected]192.168.85.132:3306 /data/mysql/mysql3308/data/replcrash/py_user.frm --port=3333 --user=root 官方不推荐使用root用户Running spawned server # diagnostic mode [[email protected] ~]# mysqlfrm --diagnostic /data/mysql/mysql3308/data/replcrash/py_user.frm
故障实例OFFLINE状态，建议使用--basedir得到建表语句
1.3、mysqlfrm逻辑(default mode)
在命令行末尾添加 -vvv 可以查看执行详细步骤
[[email protected] ~]# mysqlfrm --basedir=/usr/local/mysql/ /data/mysql/mysql3306/data/replcrash/py_user.frm --port=3333 --user=root -vvv
# Checking read access to .frm files
# Creating a temporary datadir = /tmp/tmpktcZWc
# Spawning server with --user=root.
# Starting the spawned server on port 3333 ...
# Cloning the MySQL server located at /usr/local/mysql.
# Configuring new instance...
# Locating mysql tools...
# Location of files:
# mysqld: /usr/local/mysql/bin/mysqld
# mysqladmin: /usr/local/mysql/bin/mysqladmin
# Setting up empty database and mysql tables...
2017-12-28T09:36:22.383542Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-12-28T09:36:24.528222Z 0 [Warning] InnoDB: New log files created, LSN=45790
2017-12-28T09:36:24.936974Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2017-12-28T09:36:25.019189Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 925a5f84-ebb2-11e7-a13e-000c29c1025c.
2017-12-28T09:36:25.024957Z 0 [Warning] Gtid table is not ready to be used. Table ‘mysql.gtid_executed‘ cannot be opened.
2017-12-28T09:36:25.025657Z 1 [Warning] [email protected] is created with an empty password ! Please consider switching off the --initialize-insecure option.
# Starting new instance of the server...
# Startup command for new server:
/usr/local/mysql/bin/mysqld --no-defaults --basedir=/usr/local/mysql --datadir=/tmp/tmpktcZWc --pid-file=/tmp/tmpktcZWc/clone.pid --port=3333 --server-id=101 --socket=/tmp/tmpktcZWc/mysql.sock --tmpdir=/tmp/tmpktcZWc --user=root
# Testing connection to new instance...
2017-12-28T09:36:29.346999Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-12-28T09:36:29.369718Z 0 [Note] --secure-file-priv is set to NULL. Operations related to importing and exporting data are disabled
2017-12-28T09:36:29.369837Z 0 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.7.19) starting as process 9382 ...
2017-12-28T09:36:29.387216Z 0 [Note] InnoDB: PUNCH HOLE support available
2017-12-28T09:36:29.387287Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-12-28T09:36:29.387309Z 0 [Note] InnoDB: Uses event mutexes
2017-12-28T09:36:29.387334Z 0 [Note] InnoDB: GCC builtin __sync_synchronize() is used for memory barrier
2017-12-28T09:36:29.387353Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-12-28T09:36:29.387372Z 0 [Note] InnoDB: Using Linux native AIO
2017-12-28T09:36:29.388729Z 0 [Note] InnoDB: Number of pools: 1
2017-12-28T09:36:29.389559Z 0 [Note] InnoDB: Using CPU crc32 instructions
2017-12-28T09:36:29.396790Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2017-12-28T09:36:29.413527Z 0 [Note] InnoDB: Completed initialization of buffer pool
2017-12-28T09:36:29.419969Z 0 [Note] InnoDB: page_cleaner coordinator priority: -20
2017-12-28T09:36:29.434005Z 0 [Note] InnoDB: Highest supported file format is Barracuda.
2017-12-28T09:36:29.503503Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2017-12-28T09:36:29.503705Z 0 [Note] InnoDB: Setting file ‘./ibtmp1‘ size to 12 MB. Physically writing the file full; Please wait ...
2017-12-28T09:36:30.110625Z 0 [Note] InnoDB: File ‘./ibtmp1‘ size is now 12 MB.
2017-12-28T09:36:30.113767Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2017-12-28T09:36:30.113804Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
2017-12-28T09:36:30.114361Z 0 [Note] InnoDB: Waiting for purge to start
# trying again...
2017-12-28T09:36:30.165192Z 0 [Note] InnoDB: 5.7.19 started; log sequence number 2539315
2017-12-28T09:36:30.165487Z 0 [Note] Plugin ‘FEDERATED‘ is disabled.
2017-12-28T09:36:30.175080Z 0 [Note] InnoDB: Loading buffer pool(s) from /tmp/tmpktcZWc/ib_buffer_pool
2017-12-28T09:36:30.176769Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key
2017-12-28T09:36:30.176801Z 0 [Note] Server hostname (bind-address): ‘*‘; port: 3333
2017-12-28T09:36:30.176922Z 0 [Note] IPv6 is available.
2017-12-28T09:36:30.176941Z 0 [Note] - ‘::‘ resolves to ‘::‘;
2017-12-28T09:36:30.176987Z 0 [Note] Server socket created on IP: ‘::‘.
2017-12-28T09:36:30.190355Z 0 [Note] InnoDB: Buffer pool(s) load completed at 171228 17:36:30
2017-12-28T09:36:30.211166Z 0 [Note] Event Scheduler: Loaded 0 events
2017-12-28T09:36:30.211365Z 0 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: ‘5.7.19‘ socket: ‘/tmp/tmpktcZWc/mysql.sock‘ port: 3333 MySQL Community Server (GPL)
2017-12-28T09:36:30.211377Z 0 [Note] Executing ‘SELECT * FROM INFORMATION_SCHEMA.TABLES;‘ to get a list of tables using the deprecated partition engine. You may use the startup option ‘--disable-partition-engine-check‘ to skip this check.
2017-12-28T09:36:30.211381Z 0 [Note] Beginning of list of non-natively partitioned tables
2017-12-28T09:36:30.241025Z 0 [Note] End of list of non-natively partitioned tables
# trying again...
# Success!
# Setting the root password...
mysqladmin: [Warning] Using a password on the command line interface can be insecure.
Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety.
# Connection Information:
# -uroot -proot --socket=/tmp/tmpktcZWc/mysql.sock
#...done.
2017-12-28T09:36:31.297094Z 3 [Note] Aborted connection 3 to db: ‘unconnected‘ user: ‘root‘ host: ‘localhost‘ (Got an error reading communication packets)
# Connecting to spawned server
done.
# Reading .frm files
#
# Reading the py_user.frm file.
# Changing engine for .frm file /tmp/tmpktcZWc/replcrash_temp/py_user.frm:
# Skipping to header at : 2
# General Data from .frm file:
{‘IO_SIZE‘: 4096,
‘MYSQL_VERSION_ID‘: 50719,
‘avg_row_length‘: 0,
‘charset_low‘: 0,
‘create_options‘: 9,
‘db_create_pack‘: 2,
‘default_charset‘: 33,
‘default_part_eng‘: 0,
‘extra_size‘: 33,
‘frm_file_ver‘: 5,
‘frm_version‘: 10,
‘key_block_size‘: 0,
‘key_info_length‘: 33,
‘key_length‘: 361,
‘legacy_db_type‘: ‘INNODB‘,
‘length‘: 12288,
‘max_rows‘: 0,
‘min_rows‘: 0,
‘rec_length‘: 138,
‘row_type‘: 0,
‘table_charset‘: 33,
‘tmp_key_length‘: 361}
# Engine string: InnoDB
# Server version in file: 5.7.19
#
# CREATE statement for /data/mysql/mysql3306/data/replcrash/py_user.frm:
#
CREATE TABLE `replcrash`.`py_user` (
`uid` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(32) DEFAULT NULL,
`add_time` datetime DEFAULT NULL,
`server_id` varchar(10) DEFAULT NULL,
PRIMARY KEY (`uid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
# Shutting down spawned server
# Removing the temporary datadir
2017-12-28T09:36:31.471827Z 0 [Note] Giving 0 client threads a chance to die gracefully
2017-12-28T09:36:31.471874Z 0 [Note] Shutting down slave threads
2017-12-28T09:36:31.471891Z 0 [Note] Forcefully disconnecting 0 remaining clients
2017-12-28T09:36:31.471908Z 0 [Note] Event Scheduler: Purging the queue. 0 events
2017-12-28T09:36:31.473626Z 0 [Note] Binlog end
2017-12-28T09:36:31.473789Z 0 [Note] Shutting down plugin ‘ngram‘
2017-12-28T09:36:31.473820Z 0 [Note] Shutting down plugin ‘BLACKHOLE‘
2017-12-28T09:36:31.473839Z 0 [Note] Shutting down plugin ‘ARCHIVE‘
2017-12-28T09:36:31.473853Z 0 [Note] Shutting down plugin ‘partition‘
2017-12-28T09:36:31.473866Z 0 [Note] Shutting down plugin ‘INNODB_SYS_VIRTUAL‘
2017-12-28T09:36:31.473880Z 0 [Note] Shutting down plugin ‘INNODB_SYS_DATAFILES‘
2017-12-28T09:36:31.473893Z 0 [Note] Shutting down plugin ‘INNODB_SYS_TABLESPACES‘
2017-12-28T09:36:31.473905Z 0 [Note] Shutting down plugin ‘INNODB_SYS_FOREIGN_COLS‘
2017-12-28T09:36:31.473918Z 0 [Note] Shutting down plugin ‘INNODB_SYS_FOREIGN‘
2017-12-28T09:36:31.473931Z 0 [Note] Shutting down plugin ‘INNODB_SYS_FIELDS‘
2017-12-28T09:36:31.473943Z 0 [Note] Shutting down plugin ‘INNODB_SYS_COLUMNS‘
2017-12-28T09:36:31.473956Z 0 [Note] Shutting down plugin ‘INNODB_SYS_INDEXES‘
2017-12-28T09:36:31.473969Z 0 [Note] Shutting down plugin ‘INNODB_SYS_TABLESTATS‘
2017-12-28T09:36:31.473981Z 0 [Note] Shutting down plugin ‘INNODB_SYS_TABLES‘
2017-12-28T09:36:31.474010Z 0 [Note] Shutting down plugin ‘INNODB_FT_INDEX_TABLE‘
2017-12-28T09:36:31.474024Z 0 [Note] Shutting down plugin ‘INNODB_FT_INDEX_CACHE‘
2017-12-28T09:36:31.474036Z 0 [Note] Shutting down plugin ‘INNODB_FT_CONFIG‘
2017-12-28T09:36:31.474156Z 0 [Note] Shutting down plugin ‘INNODB_FT_BEING_DELETED‘
2017-12-28T09:36:31.474175Z 0 [Note] Shutting down plugin ‘INNODB_FT_DELETED‘
2017-12-28T09:36:31.474188Z 0 [Note] Shutting down plugin ‘INNODB_FT_DEFAULT_STOPWORD‘
2017-12-28T09:36:31.474214Z 0 [Note] Shutting down plugin ‘INNODB_METRICS‘
2017-12-28T09:36:31.474227Z 0 [Note] Shutting down plugin ‘INNODB_TEMP_TABLE_INFO‘
2017-12-28T09:36:31.474241Z 0 [Note] Shutting down plugin ‘INNODB_BUFFER_POOL_STATS‘
2017-12-28T09:36:31.474256Z 0 [Note] Shutting down plugin ‘INNODB_BUFFER_PAGE_LRU‘
2017-12-28T09:36:31.474269Z 0 [Note] Shutting down plugin ‘INNODB_BUFFER_PAGE‘
2017-12-28T09:36:31.474281Z 0 [Note] Shutting down plugin ‘INNODB_CMP_PER_INDEX_RESET‘
2017-12-28T09:36:31.474303Z 0 [Note] Shutting down plugin ‘INNODB_CMP_PER_INDEX‘
2017-12-28T09:36:31.474317Z 0 [Note] Shutting down plugin ‘INNODB_CMPMEM_RESET‘
2017-12-28T09:36:31.474330Z 0 [Note] Shutting down plugin ‘INNODB_CMPMEM‘
2017-12-28T09:36:31.474343Z 0 [Note] Shutting down plugin ‘INNODB_CMP_RESET‘
2017-12-28T09:36:31.474356Z 0 [Note] Shutting down plugin ‘INNODB_CMP‘
2017-12-28T09:36:31.474369Z 0 [Note] Shutting down plugin ‘INNODB_LOCK_WAITS‘
2017-12-28T09:36:31.474382Z 0 [Note] Shutting down plugin ‘INNODB_LOCKS‘
2017-12-28T09:36:31.474395Z 0 [Note] Shutting down plugin ‘INNODB_TRX‘
2017-12-28T09:36:31.474407Z 0 [Note] Shutting down plugin ‘InnoDB‘
2017-12-28T09:36:31.474590Z 0 [Note] InnoDB: FTS optimize thread exiting.
2017-12-28T09:36:31.476410Z 0 [Note] InnoDB: Starting shutdown...
2017-12-28T09:36:31.577509Z 0 [Note] InnoDB: Dumping buffer pool(s) to /tmp/tmpktcZWc/ib_buffer_pool
2017-12-28T09:36:31.577612Z 0 [ERROR] InnoDB: Cannot open ‘/tmp/tmpktcZWc/ib_buffer_pool.incomplete‘ for writing: No such file or directory
2017-12-28T09:36:33.117642Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2539334
2017-12-28T09:36:33.117712Z 0 [Note] Shutting down plugin ‘MEMORY‘
2017-12-28T09:36:33.117727Z 0 [Note] Shutting down plugin ‘PERFORMANCE_SCHEMA‘
2017-12-28T09:36:33.117761Z 0 [Note] Shutting down plugin ‘MRG_MYISAM‘
2017-12-28T09:36:33.117767Z 0 [Note] Shutting down plugin ‘MyISAM‘
2017-12-28T09:36:33.117783Z 0 [Note] Shutting down plugin ‘CSV‘
2017-12-28T09:36:33.117790Z 0 [Note] Shutting down plugin ‘sha256_password‘
2017-12-28T09:36:33.117794Z 0 [Note] Shutting down plugin ‘mysql_native_password‘
2017-12-28T09:36:33.117966Z 0 [Note] Shutting down plugin ‘binlog‘
2017-12-28T09:36:33.118884Z 0 [Note] Unable to delete pid file: No such file or directory
2017-12-28T09:36:33.118898Z 0 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete
[[email protected] ~]#
• 检查读取.frm文件的权限
• 创建临时datadir
• 克隆生成新实例
• 启动、连接新实例
• 读取.frm文件，生成create语句
• 关闭新实例，删除临时datadir
mysqlfrm的使用参考：5.13 mysqlfrm — File reader for .frm files、3.3.2 How do you recover the CREATE statement from a damaged or offline server?
二、恢复表数据
这里用到表空间传输，恢复环境使用mysqlfrm得到语句创建相同结构的数据表，然后discard表空间，拷贝故障实例下的ibd文件并修改权限，重新载入表空间，载入过程会有警告，但不影响数据的读取
# 将mysqlfrm得到建表语句拷贝到192.168.85.132,3308上执行
[email protected]192.168.85.132,3308 [(none)]> use replcrash;
[email protected]192.168.85.132,3308 [replcrash]> drop table if exists py_user;
# 执行mysqlfrm得到的create语句
[email protected]192.168.85.132,3308 [replcrash]> CREATE TABLE `replcrash`.`py_user` (
-> `uid` int(11) NOT NULL AUTO_INCREMENT,
-> `name` varchar(32) DEFAULT NULL,
-> `add_time` datetime DEFAULT CURRENT_TIMESTAMP,
-> `server_id` varchar(10) DEFAULT NULL,
-> PRIMARY KEY (`uid`)
-> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Query OK, 0 rows affected (0.17 sec)
# discard 表空间
[email protected]192.168.85.132,3308 [replcrash]> alter table py_user discard tablespace;
Query OK, 0 rows affected (0.86 sec)
# 拷贝ibd文件，并修改权限
[[email protected] ~]# scp /data/mysql/mysql3306/data/replcrash/py_user.ibd 192.168.85.132:/data/mysql/mysql3308/data/replcrash/
[[email protected] ~]# chown -R mysql:mysql /data/mysql/mysql3308/data/replcrash/py_user.ibd
# 载入表空间
[email protected]192.168.85.132,3308 [replcrash]> alter table py_user import tablespace;
Query OK, 0 rows affected, 1 warning (0.24 sec)
[email protected]192.168.85.132,3308 [replcrash]> show warnings;
+---------+------+---------------------------------------------------------------------------------------------------------------------------------------------------+
| Level | Code | Message |
+---------+------+---------------------------------------------------------------------------------------------------------------------------------------------------+
| Warning | 1810 | InnoDB: IO Read error: (2, No such file or directory) Error opening ‘./replcrash/py_user.cfg‘, will attempt to import without schema verification |
+---------+------+---------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.01 sec)
# 查询数据是否一致
[email protected]192.168.85.132,3308 [replcrash]> select * from py_user;
+-----+------------------------------+---------------------+-----------+
| uid | name | add_time | server_id |
+-----+------------------------------+---------------------+-----------+
| 1 | U4F9ZKZTJ9GK6RFV4A3EEJ | 2017-12-21 10:46:44 | 1323306 |
| 2 | IB1FSWGFEH5CGIT4FWEZK81V | 2017-12-21 10:47:14 | 1323306 |
| 3 | 9N9TF1C8SEGKXNHBUE6CPOXD0IUU | 2017-12-21 10:47:15 | 1323306 |
| 4 | TEBD44BM3E0NZPSIVGI79Z | 2017-12-21 10:47:16 | 1323306 |
| 5 | XS8Z2W2XIDIB5Y4TMF78L9INM7 | 2017-12-21 10:47:17 | 1323306 |
| 6 | OP65BAJ6MNI1W02PNMJGHXX | 2017-12-21 10:47:18 | 1323306 |
| 7 | 19R173XU7QXRPG21413BYMWMY1 | 2017-12-21 10:47:19 | 1323306 |
| 8 | 768NGEAGK0VJ57MW98SG | 2017-12-21 10:58:02 | 1323306 |
| 9 | 9EDYG3U7LFL80WIDKSV5JTI | 2017-12-21 11:03:41 | 1323306 |
+-----+------------------------------+---------------------+-----------+
9 rows in set (0.00 sec)
三、表空间传输
前面重新载入表空间时出现了警告，是因为我们假设3306实例出现故障，数据库无法启动，因此不能按照正常的表空间传输步骤操作
# InnoDB表空间传输迁移数据
1、迁出实例3306
[email protected]192.168.85.132,3306 [(none)]> use replcrash;
[email protected]192.168.85.132,3306 [replcrash]> select count(*) from py_user;
[email protected]192.168.85.132,3306 [replcrash]> show create table py_user;
2、迁入实例3308
# 创建表
[email protected]192.168.85.132,3308 [(none)]> use replcrash;
[email protected]192.168.85.132,3308 [replcrash]> CREATE TABLE `py_user` (
`uid` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(32) DEFAULT NULL,
`add_time` datetime DEFAULT CURRENT_TIMESTAMP,
`server_id` varchar(10) DEFAULT NULL,
PRIMARY KEY (`uid`)
) ENGINE=InnoDB;
# 查看相关文件
[[email protected] ~]# ll /data/mysql/mysql3308/data/replcrash/py_user*
-rw-r-----. 1 mysql mysql 8666 Dec 20 16:57 /data/mysql/mysql3308/data/replcrash/py_user.frm
-rw-r-----. 1 mysql mysql 98304 Dec 20 16:57 /data/mysql/mysql3308/data/replcrash/py_user.ibd
[[email protected] ~]#
# discard 表空间，.ibd文件会被删除
[email protected]192.168.85.132,3308 [replcrash]> alter table py_user discard tablespace;
# 再次查看相关文件
[[email protected] ~]# ll /data/mysql/mysql3308/data/replcrash/py_user*
-rw-r-----. 1 mysql mysql 8666 Dec 20 16:57 /data/mysql/mysql3308/data/replcrash/py_user.frm
[[email protected] ~]#
3、迁出实例3306
[email protected]192.168.85.132,3306 [replcrash]> flush tables py_user for export;
这个时候会加表锁，只能读不能写，同时会产生一个py_user.cfg文件
[[email protected] ~]# ll /data/mysql/mysql3306/data/replcrash/py_user*
-rw-r-----. 1 mysql mysql 517 Dec 20 17:03 /data/mysql/mysql3306/data/replcrash/py_user.cfg
-rw-r-----. 1 mysql mysql 8666 Nov 30 09:23 /data/mysql/mysql3306/data/replcrash/py_user.frm
-rw-r-----. 1 mysql mysql 376832 Dec 20 17:03 /data/mysql/mysql3306/data/replcrash/py_user.ibd
[[email protected] ~]#
# 将.idb、.cfg拷贝到迁入实例对应目录
[[email protected] ~]# scp /data/mysql/mysql3306/data/replcrash/py_user.{cfg,ibd} 192.168.85.132:/data/mysql/mysql3308/data/replcrash/
# 解除锁定
[email protected]192.168.85.132,3306 [replcrash]> unlock tables;
4、迁入实例3308
# 修改文件权限
[[email protected] ~]# chown mysql.mysql /data/mysql/mysql3308/data/replcrash/py_user.{ibd,cfg}
# 导入表空间文件
[email protected]192.168.85.132,3308 [replcrash]> alter table py_user import tablespace;
到这里整个innodb表就被迁移完成，比起逻辑(mysqldump)或物理备份(xtrabackup)方便很多
知晓基于.frm、.ibd恢复数据，再去阅读从完整备份恢复单个innodb表就简单了
原文地址：https://www.cnblogs.com/Uest/p/8075145.html
时间： 2024-07-29 02:55:28