参考文档：
一台MySQL服务器启动多个端口
/usr/local/mysql-bbs/bin/mysqld --basedir=/usr/local/mysql-bbs --datadir=/usr/local/mysql-bbs/data --plugin-dir=/usr/local/mysql-bbs/lib/plugin --user=mysql --log-error=/usr/local/mysql-bbs/data/product.kimiss.com.err --open-files-limit=8192 --pid-file=/usr/local/mysql-bbs/data/product.pid --socket=/tmp/mysql-bbs.sock --port=3307
/usr/local/mysql-product/bin/mysqld --basedir=/usr/local/mysql-product --datadir=/usr/local/mysql-product/data --plugin-dir=/usr/local/mysql-product/lib/plugin --user=mysql --log-error=/usr/local/mysql-product/data/product.kimiss.com.err --open-files-limit=8192 --pid-file=/usr/local/mysql-product/data/product.pid --socket=/tmp/mysql-product.sock --port=3306
/usr/local/mysql-bbs 下的目录，把mysql相关的内容都移动到这个文件中 bin 中包含/usr/bin/mysql* /usr/sbin/mysql*
drwxr-xr-x 5 root root 4096 12月 12 13:45 ./
drwxr-xr-x 13 root root 4096 12月 12 11:37 ../
drwxr-xr-x 2 root root 4096 12月 12 11:48 bin/
drwxr-xr-x 2 root root 4096 8月 25 21:16 conf.d/
lrwxrwxrwx 1 root root 27 12月 12 11:43 data -> /export/data/mysql-bbs/data/
lrwxrwxrwx 1 root root 18 12月 12 11:41 include -> /usr/include/mysql/
drwxr-xr-x 2 root root 4096 12月 12 11:18 lib/
-rw-r--r-- 1 root root 1685 12月 12 12:08 my.cnf
lrwxrwxrwx 1 root root 16 12月 12 11:20 share -> /usr/share/mysql/
访问：
mysql -uroot -proot -h127.0.0.1 -P3306
mysql -uroot -proot -h127.0.0.1 -P3307
my.cnf 配置文件中client port都是3306，mysqld是各自的端口
[client]
port = 3306
socket = /tmp/mysql-product.sock
[mysqld]
bind-address = 127.0.0.1
port = 3306
socket = /tmp/mysql-product.sock
back_log = 50
max_connections = 1000
max_connect_errors = 10
table_open_cache = 2048
max_allowed_packet = 16M
binlog_cache_size = 1M
max_heap_table_size = 64M
read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M
thread_cache_size = 8
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
default-storage-engine = MYISAM
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
slow_query_log
long_query_time = 2
#log-bin=mysql-bin
#binlog_format=mixed
server-id = 1
#binlog-do-db=gaojie100
##binlog-do-db=gaojie_brand
##binlog-do-db=gaojie_manage
##binlog-do-db=log_data
##binlog-do-do=xf_stats
binlog-ignore-db=mysql
key_buffer_size = 32M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 2G
myisam_repair_threads = 1
myisam_recover
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 512M
innodb_data_file_path = ibdata1:10M:autoextend
innodb_write_io_threads = 8
innodb_read_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 512M
sort_buffer_size = 512M
read_buffer = 8M
write_buffer = 8M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open-files-limit = 8192
遇到的问题
141212 13:53:30 [Note] Plugin 'FEDERATED' is disabled.
141212 13:53:30 InnoDB: The InnoDB memory heap is disabled
141212 13:53:30 InnoDB: Mutexes and rw_locks use GCC atomic builtins
141212 13:53:30 InnoDB: Compressed tables use zlib 1.2.3.4
141212 13:53:30 InnoDB: Initializing buffer pool, size = 128.0M
141212 13:53:30 InnoDB: Completed initialization of buffer pool
141212 13:53:30 InnoDB: highest supported file format is Barracuda.
141212 13:53:30 InnoDB: Waiting for the background threads to start
141212 13:53:31 InnoDB: 5.5.38 started; log sequence number 1618567
141212 13:53:31 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306
141212 13:53:31 [Note] - '127.0.0.1' resolves to '127.0.0.1';
141212 13:53:31 [Note] Server socket created on IP: '127.0.0.1'.
141212 13:53:31 [ERROR] /usr/local/mysql-product/bin/mysqld: Can't create/write to file '/usr/local/mysql-product/data/product.pid' (Errcode: 13)
141212 13:53:31 [ERROR] Can't start server: can't create PID file: Permission denied
cd /usr/local/mysql-product/data
chmod 777 .