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linux:databases:mysql [2017/03/03 14:24]
tkilla 		linux:databases:mysql [2017/11/22 01:10] (current)
tkilla
Line 80: Line 80:
  
    mysqldump --opt --host=127.0.0.1 --default-character-set=utf8 --user=root --password=${PWD} $DB > $FILE    mysqldump --opt --host=127.0.0.1 --default-character-set=utf8 --user=root --password=${PWD} $DB > $FILE
 +
 +
 +If you get "error 34 too many open files".. increase open_files_limit in /etc/mysql/my.cnf
 +
 +  open_files_limit = 50000
 +
 +
 +Restart mysql and check to see current setting:
 +  SHOW VARIABLES LIKE 'open%';
 +
 +
 +
 +interesting parameters for replication:
 +
 +--lock-tables - READ LOCK (no writes) for currently dumped database: ensures consitent dump instead of
 +--single-transaction   Use this setting with extreme caution when backing non-transactional tables BUT
 +will give you an exact point-in-time snapshot of the data
 +--single-transaction produces a checkpoint that allows the dump to capture all data prior to the
 +checkpoint while receiving incoming changes.
 +Those incoming changes do not become part of the dump. That ensures the same point-in-time for all tables.
 +USE IF ALL TABLES ARE INNODB
 +
 +--opt includes --lock-tables
  
 ---- ----
Line 88: Line 111:
  
    mysql --host=127.0.0.1  -u root --port=$PORT --password=${DBPWD} ${DBNAME} < ${MYSQLDUMP_FILE}    mysql --host=127.0.0.1  -u root --port=$PORT --password=${DBPWD} ${DBNAME} < ${MYSQLDUMP_FILE}
 +
  
 ---- ----
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 -- --
 +
 +== Convert MyISM to INNODB  ==
 +
 +.. because it's better :)
 +
 +a little script to get all required alter table statements 
 + 
 +  mysql -u root --password=xxxxx -e "SELECT  CONCAT('USE ', table_schema, ';  ALTER TABLE ', table_name, ' ENGINE=InnoDB;') FROM  information_schema.tables WHERE  engine = 'MyISAM' AND  table_schema NOT IN ('mysql', 'information_schema', 'performance_schema');" > /root/alter_to_innodb.sql
 +
 +then execute the file via mysql command: mysql -u ... < /root/alter_to_innodb.sql
 +
 +read this great article: http://mysql.rjweb.org/doc.php/myisam2innodb
 +
  
 == SSL Connection  == == SSL Connection  ==
linux/databases/mysql.1488547458.txt.gz ยท Last modified: 2017/03/03 14:24 by tkilla

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