• mysql 启动服务


    http://blog.chinaunix.net/uid-13642598-id-3153537.html
    mysql的四种启动方式:
    1、mysqld
    启动mysql服务器:./mysqld --defaults-file=/etc/my.cnf --user=root
    客户端连接:
    mysql --defaults-file=/etc/my.cnf
    or
    mysql -S /tmp/mysql.sock
     
    2、mysqld_safe
    启动mysql服务器:./mysqld_safe --defaults-file=/etc/my.cnf --user=root &
    客户端连接:
    mysql --defaults-file=/etc/my.cnf
    or
    mysql -S /tm/mysql.sock
     
    3、mysql.server
    cp -v /usr/local/mysql/support-files/mysql.server /etc/init.d/
    chkconfig --add mysql.server
    启动mysql服务器:service mysql.server {start|stop|restart|reload|force-reload|status}
    客户端连接:同1、2
     
    4、mysqld_multi
    mkdir $MYSQL_BASE/data2
    cat <<-EOF>> /etc/my.cnf
    [mysqld_multi]
    mysqld = /usr/local/mysql/bin/mysqld_safe
    mysqladmin = /user/local/mysql/bin/mysqladmin
    user = mysqladmin
    password = mysqladmin
     
    [mysqld3306]
    port            = 3306
    socket          = /tmp/mysql3306.sock
    pid-file = /tmp/mysql3306.pid
    skip-external-locking
    key_buffer_size = 16M
    max_allowed_packet = 1M
    table_open_cache = 64
    sort_buffer_size = 512K
    net_buffer_length = 8K
    read_buffer_size = 256K
    read_rnd_buffer_size = 512K
    myisam_sort_buffer_size = 8M
    basedir = /usr/local/mysql
    datadir = /usr/local/mysql/data
     
    [mysqld3307]
    port            = 3307
    socket          = /tmp/mysql3307.sock
    pid-file = /tmp/mysql3307.pid
    skip-external-locking
    key_buffer_size = 16M
    max_allowed_packet = 1M
    table_open_cache = 64
    sort_buffer_size = 512K
    net_buffer_length = 8K
    read_buffer_size = 256K
    read_rnd_buffer_size = 512K
    myisam_sort_buffer_size = 8M
    basedir = /usr/local/mysql
    datadir = /usr/local/mysql/data2
    EOF
     
    #mysql -S /tmp/mysql3306.sock
    mysql>GRANT SHUTDOWN ON *.* TO 'mysqladmin'@'localhost' identified by 'mysqladmin' with grant option;
     
    #mysql -S /tmp/mysql3307.sock
    mysql>GRANT SHUTDOWN ON *.* TO 'mysqladmin'@'localhost' identified by 'mysqladmin' with grant option;
     
    启动mysql服务器:./mysqld_multi --defaults-file=/etc/my.cnf start 3306-3307
    关闭mysql服务器:mysqladmin shutdown
     
    可参考<<mysql5.1参考手册>>
    http://dev.mysql.com/doc/refman/5.1/zh/database-administration.html#server-side-scripts
     
     

    今天给新加的几个数据库备份,在执行mysqldump的时候,居然报mysqldump: Got error: 1044: Access denied for user 'jpzen'@'localhost' to database 'information_schema' when using LOCK TABLES,网上一搜,觉得有可能是权限问题,马上查看mysql里操作记录,执行tail -n 40000 .mysql_history|grep GRANT,发现只给SELECT,INSERT,UPDATE,DELETE这几个权限,为了在不改动权限的情况下,那只能用下面的方法.

    解决办法:
    mysqldump -u dbuser -ppass db --skip-lock-tables > db.sql
    ps:在导出时,加上--skip-lock-tables选项即可.

    但这个方法在数据量过大的话,会出现卡死,所以最好经常检查下sql备份,避免在要使用备份的时候杯具.

     
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  • 原文地址:https://www.cnblogs.com/studyNT/p/5365461.html
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