由于业务需要在MySQL实例中创建部分库的从库，已有的Mysql实例的版本是mysql-5.5.49，是一个非常老的版本。 本文档涉及到服务器中运行多实例和构建实例中部分库的从库。 服务器 mysql端
由于业务需要在MySQL实例中创建部分库的从库，已有的Mysql实例的版本是mysql-5.5.49，是一个非常老的版本。
本文档涉及到服务器中运行多实例和构建实例中部分库的从库。
1、服务器2上创建3307实例
首先需要准备源码编译包，这个就不在描述了。由于我服务器2上已经存在了一个同样版本的实例，我就直接copy一份，命名为： mysql-5.5.49_3307 ，并做了一个软连接
ln -s mysql-5.5.49_3307 mysql_3307
服务器2的3307实例是从库，my.cnf的配置最好服务器1主库实例的配置相同，注意修改对应server_id
[client]port = 3307socket = /tmp/mysql_3307.sock
[mysqld]port = 3307socket = /tmp/mysql_3307.sockdatadir = /opt/mysql_3307tmpdir=/tmp
skip-name-resolvelog_warnings = 2
#skip-grant-tablesbig_tables = onback_log = 600max_connections = 3000max_connect_errors = 3000table_open_cache = 2048max_allowed_packet = 128Mbinlog_cache_size = 4Mmax_heap_table_size = 1024Mread_buffer_size = 16Mread_rnd_buffer_size = 16Msort_buffer_size = 8Mjoin_buffer_size = 16Mthread_cache_size = 600thread_concurrency = 16query_cache_size = 512Mquery_cache_limit = 32Mdefault-storage-engine = MYISAM#thread_stack = 192K#transaction_isolation = REPEATABLE READtmp_table_size = 1024M
server-id = 10155log-bin = mysql-binbinlog_format = mixedexpire_logs_days = 8
replicate_wild_ignore_table = performance_schema.%replicate_wild_ignore_table = information_schema.%replicate_wild_ignore_table = mysql.%replicate_wild_ignore_table = test.%replicate_wild_ignore_table = tmp.%#skip-name-resolve
slave_net_timeout = 30#master-connect-retry = 10
log-slave-updates = 1
slow_query_log = sql-slow.loglong_query_time = 5slave-skip-errors = 1062,1236
key_buffer_size = 2Gbulk_insert_buffer_size = 64Mmyisam_sort_buffer_size = 128Mmyisam_max_sort_file_size = 4Gmyisam_repair_threads = 1myisam_recover
innodb_additional_mem_pool_size = 16Minnodb_buffer_pool_size = 4Ginnodb_data_file_path = ibdata1:256M:autoextendinnodb_write_io_threads = 8innodb_read_io_threads = 8innodb_thread_concurrency = 16innodb_flush_log_at_trx_commit = 2innodb_log_buffer_size = 16Minnodb_log_file_size = 256Minnodb_log_files_in_group = 3innodb_max_dirty_pages_pct = 90innodb_lock_wait_timeout = 60innodb_file_per_table = 1
[mysqldump]quickmax_allowed_packet = 32M
[mysql]no-auto-rehash
[myisamchk]key_buffer_size = 512Msort_buffer_size = 512Mread_buffer = 8Mwrite_buffer = 8M
[mysqlhotcopy]interactive-timeout
[mysqld_safe]open-files-limit = 10240#log-error=/opt/mysql_3307/mysqld.loglong_query_time = 3log-slow-queries=/opt/mysql_3307/mysql_slow_query.log
注意 添加忽略到不需要同步的主库，（涉及隐私就贴部分公共库出来了）
replicate_wild_ignore_table = performance_schema.%replicate_wild_ignore_table = information_schema.%replicate_wild_ignore_table = mysql.%replicate_wild_ignore_table = test.%replicate_wild_ignore_table = tmp.%
创建数据目录，目录名称一定和my.cnf文件中 “datadir” 配置相同
mkdir -p /opt/mysql_3307
初始化数据库
/usr/local/mysql_3307/scripts/mysql_install_db --defaults-file=/etc/my_3307.cnf --user=mysql --basedir=/usr/local/mysql-5.5.49_3307/ --datadir=/opt/mysql_3307/
启动数据库
nohup /usr/local/mysql_3307/bin/mysqld_safe --defaults-file=/etc/my_3307.cnf &
登录设置root密码，第一次登陆不需要输入密码
#/usr/local/mysql_3307/bin/mysql -uroot -S /tmp/mysql_3307.sockmysql>update mysql.user set password=PASSWORD('123456') where User='root';mysql>flush privileges;
2、服务器1上导出实例3306的部分库（需要做从库的数据库）
本次需要对 wcd_ft 这个数据库做从库
/usr/local/mysql/bin/mysqldump -uroot -p --single-transaction --master-data=2 -R --database wcd_ft > wcd_ft.sql
将备份文件传输到服务器2上。
登录数据库创建用于同步的数据库用户
mysql>grant replication slave on *.* to 'repl'@'%' identified by 'repl123';mysql>flush privileges;
3、服务器2上导入数据库
在服务器2上导入刚备份的数据库
/usr/local/mysql_3307/bin/mysql -uroot -p -S /tmp/mysql_3307.sock < wcd_ft.sql
查看数据库备份文件 wcd_ft.sql 的主库master信息
grep -i "change master" wcd_ft.sql
结果：
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.007289', MASTER_LOG_POS=662625023;
完成后，登录数据库配置主从库的同步。
CHANGE MASTER TOMASTER_HOST='10.10.18.10（服务器1的ip地址）',MASTER_USER='repl',MASTER_PASSWORD='repl123',MASTER_LOG_FILE='mysql-bin.007289',MASTER_LOG_POS=662625023;
#启动slave从库start slave；
查看从库的同步状态
show slave status\G;
配置完成。
