centos7 Mariadb创建多实例数据库步骤教程

为了对mycat做实验，于是创建多实例Mariadb，做以下笔记：

创建多实例数据库文件夹：

[root@linux-node1 ~]# mkdir /home/multiMysql
[root@linux-node1 ~]# mkdir /home/multiMysql/{etc,socket,bin,datadir}
[root@linux-node1 ~]# mkdir /home/multiMysql/datadir/{3307,3308,3309}
[root@linux-node1 ~]# chmod -R 777 /home/multiMysql

初始化实例：

$ mysql_install_db --basedir=/usr --datadir=/home/multiMysql/datadir/3307 --user=mysql
$ mysql_install_db --basedir=/usr --datadir=/home/multiMysql/datadir/3308 --user=mysql
$ mysql_install_db --basedir=/usr --datadir=/home/multiMysql/datadir/3309 --user=mysql

创建共用配置文件：

$ mkdir /home/multiMysql/etc/my.cnf.d/
#vim /home/multiMysql/etc/my.cnf.d/my.cnf

my.cnf 文件内容：

[mysqld]
skip-name-resolve
lower_case_table_names=1
innodb_file_per_table=1
back_log = 50
max_connections = 300
max_connect_errors = 1000
table_open_cache = 2048
max_allowed_packet = 16M
binlog_cache_size = 2M
max_heap_table_size = 64M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 64
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
default-storage-engine = innodb
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
log-bin=mysql-bin
binlog_format=row
slow_query_log
long_query_time = 1
server-id = 1
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 200M
innodb_data_file_path = ibdata1:10M:autoextend
innodb_file_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 16M
innodb_log_file_size = 512M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 60
innodb_lock_wait_timeout = 120
[mysqldump]
quick
max_allowed_packet = 256M
[mysql]
no-auto-rehash
prompt=\\u@\\d \\R:\\m>
[myisamchk]
key_buffer_size = 512M
sort_buffer_size = 512M
read_buffer = 8M
write_buffer = 8M

[mysqlhotcopy]
interactive-timeout

[mysqld_safe]
open-files-limit = 8192

创建3307实例配置文件：

vim /home/multiMysql/etc/3307.cnf

3307.cnf 文件内容如下：

[client]
port = 3307
socket = /home/multiMysql/socket/mysql3307.sock

[mysqld]
datadir=/home/multiMysql/datadir/3307
port = 3307
server_id =1
socket = /home/multiMysql/socket/mysql3307.sock
!includedir /home/multiMysql/etc/my.cnf.d

启动实例：

 /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3307.cnf &