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            = 3307
socket          = /tmp/mysql_3307.sock

[mysqld]
port            = 3307
socket          = /tmp/mysql_3307.sock
datadir        = /opt/mysql_3307
tmpdir=/tmp

skip-name-resolve
log_warnings = 2

#skip-grant-tables
big_tables              = on
back_log                = 600
max_connections        = 3000
max_connect_errors      = 3000
table_open_cache        = 2048
max_allowed_packet      = 128M
binlog_cache_size      = 4M
max_heap_table_size    = 1024M
read_buffer_size        = 16M
read_rnd_buffer_size    = 16M
sort_buffer_size        = 8M
join_buffer_size        = 16M
thread_cache_size      = 600
thread_concurrency      = 16
query_cache_size        = 512M
query_cache_limit      = 32M
default-storage-engine  = MYISAM
#thread_stack          = 192K
#transaction_isolation  = REPEATABLE READ
tmp_table_size          = 1024M

server-id              = 10155
log-bin                = mysql-bin
binlog_format          = mixed
expire_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.log
long_query_time        = 5
slave-skip-errors      = 1062,1236

key_buffer_size                = 2G
bulk_insert_buffer_size        = 64M
myisam_sort_buffer_size        = 128M
myisam_max_sort_file_size      = 4G
myisam_repair_threads          = 1
myisam_recover

innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 4G
innodb_data_file_path = ibdata1:256M:autoextend
innodb_write_io_threads = 8
innodb_read_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 16M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 60
innodb_file_per_table  = 1

[mysqldump]
quick
max_allowed_packet = 32M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 512M
sort_buffer_size = 512M
read_buffer = 8M
write_buffer = 8M