常用命令:
重启
#/etc/init.d/mysqld restart 或 service mysqld restart [stop | start | restart]
导出mysql备份:
#mysqldump -uroot -p 数据库名 > /root/mysql_data_20150128/数据库名.bak.sql
导入:
#mysql -uroot -p123456
#use 数据库名;
#source /root/mysql_data_20150128/导入数据库名.bak.sql
查看mysql_error.log日志看到如下错误,关于 InnoDB信息。。
如有提示 innodb_force_recovery 导致无法启动的问题
或如下
2015-01-29 10:10:22 28851 [ERROR] InnoDB: Failed to find tablespace for table ‘”mysql”.”innodb_index_stats”‘ in the cache. Attempting to load the tablespace with space id 4354.
二。 innodb_force_recovery=1 #设置 0-6
日志可能是这样的
InnoDB: with raw, and innodb_force_… is removed.
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
设置>0时,插入表数据时可能会提示 Operation not allowed when innodb_forced_recovery > 0. 但是可以完整导出表数据
此时,应该在修复了损坏的表后,重置设置为innodb_force_recovery=0 或注释掉,并创建一个新数据库导入sql
——————————————————————————
发现在原数据库上,user表显示为 0行,但打开是有数据的。
mysql5.6 安装之后创建,以后不会自动创建这些表
innodb_index_stats
innodb_table_stats
slave_master_info
slave_relay_log_info
slave_worker_info
执行以下sql先把他们删除,再导入一个新的
DROP TABLE IF EXISTS `innodb_index_stats`; DROP TABLE IF EXISTS `innodb_table_stats`; DROP TABLE IF EXISTS `slave_master_info`; DROP TABLE IF EXISTS `slave_relay_log_info`; DROP TABLE IF EXISTS `slave_worker_info`; |
删除后在你的数据库目录下 datadir : /var/mysql_data/mysql
数据库目录下,把
innodb_index_stats.ibd 相关的 .ibd 或者 .frm 文件删除
然后,创建新的表,以下是 mysql 5.6的innodb相关表sql
CREATE TABLE `innodb_index_stats` ( `database_name` varchar(64) COLLATE utf8_bin NOT NULL, `table_name` varchar(64) COLLATE utf8_bin NOT NULL, `index_name` varchar(64) COLLATE utf8_bin NOT NULL, `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `stat_name` varchar(64) COLLATE utf8_bin NOT NULL, `stat_value` bigint(20) unsigned NOT NULL, `sample_size` bigint(20) unsigned DEFAULT NULL, `stat_description` varchar(1024) COLLATE utf8_bin NOT NULL, PRIMARY KEY (`database_name`,`table_name`,`index_name`,`stat_name`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0; |
— —————————-
— Table structure for `slave_master_info`
— —————————-
CREATE TABLE `slave_master_info` ( `Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file.', `Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log currently being read from the master.', `Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last read event.', `Host` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'The host name of the master.', `User_name` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The user name used to connect to the master.', `User_password` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The password used to connect to the master.', `Port` int(10) unsigned NOT NULL COMMENT 'The network port used to connect to the master.', `Connect_retry` int(10) unsigned NOT NULL COMMENT 'The period (in seconds) that the slave will wait before trying to reconnect to the master.', `Enabled_ssl` tinyint(1) NOT NULL COMMENT 'Indicates whether the server supports SSL connections.', `Ssl_ca` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Authority (CA) certificate.', `Ssl_capath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path to the Certificate Authority (CA) certificates.', `Ssl_cert` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL certificate file.', `Ssl_cipher` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the cipher in use for the SSL connection.', `Ssl_key` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL key file.', `Ssl_verify_server_cert` tinyint(1) NOT NULL COMMENT 'Whether to verify the server certificate.', `Heartbeat` float NOT NULL, `Bind` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Displays which interface is employed when connecting to the MySQL server', `Ignored_server_ids` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The number of server IDs to be ignored, followed by the actual server IDs', `Uuid` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The master server uuid.', `Retry_count` bigint(20) unsigned NOT NULL COMMENT 'Number of reconnect attempts, to the master, before giving up.', `Ssl_crl` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Revocation List (CRL)', `Ssl_crlpath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path used for Certificate Revocation List (CRL) files', `Enabled_auto_position` tinyint(1) NOT NULL COMMENT 'Indicates whether GTIDs will be used to retrieve events from the master.', PRIMARY KEY (`Host`,`Port`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Master Information'; -- ---------------------------- -- Records of slave_master_info -- ---------------------------- -- ---------------------------- -- Table structure for `slave_relay_log_info` -- ---------------------------- CREATE TABLE `slave_relay_log_info` ( `Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file or rows in the table. Used to version table definitions.', `Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the current relay log file.', `Relay_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The relay log position of the last executed event.', `Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log file from which the events in the relay log file were read.', `Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last executed event.', `Sql_delay` int(11) NOT NULL COMMENT 'The number of seconds that the slave must lag behind the master.', `Number_of_workers` int(10) unsigned NOT NULL, `Id` int(10) unsigned NOT NULL COMMENT 'Internal Id that uniquely identifies this record.', PRIMARY KEY (`Id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Relay Log Information'; -- ---------------------------- -- Records of slave_relay_log_info -- ---------------------------- -- ---------------------------- -- Table structure for `slave_worker_info` -- ---------------------------- CREATE TABLE `slave_worker_info` ( `Id` int(10) unsigned NOT NULL, `Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Relay_log_pos` bigint(20) unsigned NOT NULL, `Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Master_log_pos` bigint(20) unsigned NOT NULL, `Checkpoint_relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Checkpoint_relay_log_pos` bigint(20) unsigned NOT NULL, `Checkpoint_master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Checkpoint_master_log_pos` bigint(20) unsigned NOT NULL, `Checkpoint_seqno` int(10) unsigned NOT NULL, `Checkpoint_group_size` int(10) unsigned NOT NULL, `Checkpoint_group_bitmap` blob NOT NULL, PRIMARY KEY (`Id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Worker Information'; |