mysql 5.5 .17 多实例的例子

q66262

　　1：创建 /data/3307/data
　　2: : 修改my.cnf
　　# Example MySQL config file for medium systems.
　　#
　　# This is for a system with little memory (32M - 64M) where MySQL plays
　　# an important part, or systems up to 128M where MySQL is used together with
　　# other programs (such as a web server)
　　#
　　# MySQL programs look for option files in a set of
　　# locations which depend on the deployment platform.
　　# You can copy this option file to one of those
　　# locations. For information about these locations, see:
　　# http://dev.mysql.com/doc/mysql/en/option-files.html
　　#
　　# In this file, you can use all long options that a program supports.
　　# If you want to know which options a program supports, run the program
　　# with the "--help" option.
　　# The following options will be passed to all MySQL clients
　　[client]
　　#password= your_password
　　port= 3307
　　socket= /data/3307/mysql.sock
　　# Here follows entries for some specific programs
　　# The MySQL server
　　[mysqld]
　　port= 3307
　　socket= /data/3307/mysql.sock
　　basedir     = /application/mysql
　　datadir     = /data/3307/data
　　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
　　# Don't listen on a TCP/IP port at all. This can be a security enhancement,
　　# if all processes that need to connect to mysqld run on the same host.
　　# All interaction with mysqld must be made via Unix sockets or named pipes.
　　# Note that using this option without enabling named pipes on Windows
　　# (via the "enable-named-pipe" option) will render mysqld useless!
　　#
　　#skip-networking
　　# Replication Master Server (default)
　　# binary logging is required for replication
　　log-bin=mysql-bin
　　# binary logging format - mixed recommended
　　binlog_format=mixed

　　# required unique>　　# defaults to 1 if master-host is not set
　　# but will not function as a master if omitted
　　server-id= 7
　　# Replication Slave (comment out master section to use this)
　　#
　　# To configure this host as a replication slave, you can choose between
　　# two methods :
　　#
　　# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
　　#    the syntax is:
　　#
　　#    CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=,
　　#    MASTER_USER=, MASTER_PASSWORD= ;
　　#
　　#    where you replace , ,  by quoted strings and
　　#     by the master's port number (3306 by default).
　　#
　　#    Example:
　　#
　　#    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
　　#    MASTER_USER='joe', MASTER_PASSWORD='secret';
　　#
　　# OR
　　#
　　# 2) Set the variables below. However, in case you choose this method, then
　　#    start replication for the first time (even unsuccessfully, for example
　　#    if you mistyped the password in master-password and the slave fails to
　　#    connect), the slave will create a master.info file, and any later
　　#    change in this file to the variables' values below will be ignored and
　　#    overridden by the content of the master.info file, unless you shutdown
　　#    the slave server, delete master.info and restart the slaver server.
　　#    For that reason, you may want to leave the lines below untouched
　　#    (commented) and instead use CHANGE MASTER TO (see above)
　　#

　　# required unique>　　# (and different from the master)
　　# defaults to 2 if master-host is set
　　# but will not function as a slave if omitted
　　#server-id       = 2
　　#
　　# The replication master for this slave - required
　　#master-host     =   
　　#
　　# The username the slave will use for authentication when connecting
　　# to the master - required
　　#master-user     =   
　　#
　　# The password the slave will authenticate with when connecting to
　　# the master - required
　　#master-password =   
　　#
　　# The port the master is listening on.
　　# optional - defaults to 3306
　　#master-port     =  
　　#
　　# binary logging - not required for slaves, but recommended
　　#log-bin=mysql-bin
　　# Uncomment the following if you are using InnoDB tables
　　#innodb_data_home_dir = /application/mysql/data
　　#innodb_data_file_path = ibdata1:10M:autoextend
　　#innodb_log_group_home_dir = /application/mysql/data
　　# You can set .._buffer_pool_size up to 50 - 80 %
　　# of RAM but beware of setting memory usage too high
　　#innodb_buffer_pool_size = 16M
　　#innodb_additional_mem_pool_size = 2M

　　# Set .._log_file_size to 25 % of buffer pool>　　#innodb_log_file_size = 5M
　　#innodb_log_buffer_size = 8M
　　#innodb_flush_log_at_trx_commit = 1
　　#innodb_lock_wait_timeout = 50
　　[mysqld_safe]
　　log-error=/data/3307/ilanni.err
　　pid-file=/data/3307/ilanni.pid
　　[mysqldump]
　　quick
　　max_allowed_packet = 16M
　　[mysql]
　　no-auto-rehash
　　# Remove the next comment character if you are not familiar with SQL
　　#safe-updates
　　[myisamchk]
　　key_buffer_size = 20M
　　sort_buffer_size = 20M
　　read_buffer = 2M
　　write_buffer = 2M
　　[mysqlhotcopy]
　　interactive-timeout
　　3: 安装多实例
　　/application/mysql/scripts/mysql_install_db --basedir=/application/mysql --datadir=/data/3307/data --user=mysql
　　这个是因为我们初始化加入--user=mysql这个选项。当然这个也是我们所需要的，因为这增加了mysql的安全性。
　　4： 修改mysql实例的数据库目录权限
　　chown -R mysql:mysql /data/3307
　　5：启动多实例
　　/application/mysql/bin/mysqld_safe --defaults-file=/data/3307/my.cnf &
　　//停止多实例
　　/application/mysql/bin/mysqladmin  -uroot -p2017 -S /data/3307/mysql.sock  -P3308 shutdown
　　6：查看 3307 mysqld 进程是否启动
　　ps aux |grep mysqld
　　7：登录多实例
　　mysql -uroot -p -S /data/3307/mysql.sock
　　登录成功
　　[root@test tmp]# mysql -uroot -p -S /data/3307/mysql.sock
　　Enter password:
　　Welcome to the MySQL monitor.  Commands end with ; or \g.

　　Your MySQL connection>　　Server version: 5.5.17-log Source distribution
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