配置MySQL資料庫多執行個體

標籤：mysql 多執行個體 主從複製

一、什麼是mysql多執行個體

    簡單的說就是在一台機器上開啟多個不同的服務連接埠（例如：3306、3307），運行多個mysql服務進程，這些服務進程通過不同的socket監聽不同的服務連接埠來提供各自的服務。

    這些mysql多執行個體共用一套mysql安裝程式，使用不同（也可以相同）的my.cnf設定檔、啟動程式、資料檔案。在提供服務時，多執行個體mysql在邏輯上看來是各自獨立的，多個執行個體是根據設定檔中配置的參數來擷取伺服器相關硬體資源。

二、mysql常見應用情境

    由於公司業務訪問量不是很大，伺服器的資源基本都是浪費的，這時候很適合使用多執行個體的應用，如果對SQL語句最佳化做的比較好，mysql多執行個體是一個很值得使用的技術，即使並發很大，合理分配系統資源，也不會有太大問題。

三、mysql多執行個體常見配置方案

3.1 安裝mysql資料庫

 具體安裝方法，請參見 編譯方式安裝MySQL資料庫 。

3.2 配置多執行個體

 3.2.1 建立多執行個體目錄

[[email protected] ~]# mkdir -p /data/{3306,3307}/data[[email protected] ~]# tree /data        /data  ├── 3306        │   └── data        └── 3307     └── data

 3.2.2 將資料目錄及臨時目錄授權mysql使用者（在安裝mysql之前已經建立mysql使用者組和使用者）

[[email protected] ~]# chown -R mysql.mysql /data[[email protected] ~]# chmod -R 1777 /tmp[[email protected] ~]# ls -ld /data/{3306,3307}/data        drwxr-xr-x. 2 mysql mysql 4096 1月  18 22:40 /data/3306/data        drwxr-xr-x. 2 mysql mysql 4096 1月  18 22:40 /data/3307/data

 3.2.3 建立設定檔my.cnf

3306連接埠

3307連接埠

[client] port            = 3306 socket          = /data/3306/mysql.sock [mysql] no-auto-rehash [mysqld] user    = mysql port    = 3306 socket  = /data/3306/mysql.sock basedir = /application/mysql datadir = /data/3306/data open_files_limit    = 1024 back_log = 600 max_connections = 800 max_connect_errors = 3000 table_cache = 614 external-locking = FALSE max_allowed_packet =8M sort_buffer_size = 1M join_buffer_size = 1M thread_cache_size = 100 thread_concurrency = 2 query_cache_size = 2M query_cache_limit = 1M query_cache_min_res_unit = 2k #default_table_type = InnoDB thread_stack = 192K #transaction_isolation = READ-COMMITTED tmp_table_size = 2M max_heap_table_size = 2M long_query_time = 1 #log_long_format #log-error = /data/3306/error.log #log-slow-queries = /data/3306/slow.log pid-file = /data/3306/mysql.pid log-bin = /data/3306/mysql-bin relay-log = /data/3306/relay-bin relay-log-info-file = /data/3306/relay-log.info binlog_cache_size = 1M max_binlog_cache_size = 1M max_binlog_size = 2M expire_logs_days = 7 key_buffer_size = 16M read_buffer_size = 1M read_rnd_buffer_size = 1M bulk_insert_buffer_size = 1M #myisam_sort_buffer_size = 1M #myisam_max_sort_file_size = 10G #myisam_max_extra_sort_file_size = 10G #myisam_repair_threads = 1 #myisam_recover lower_case_table_names = 1 skip-name-resolve slave-skip-errors = 1032,1062 replicate-ignore-db=mysql server-id = 1 innodb_additional_mem_pool_size = 4M innodb_buffer_pool_size = 32M innodb_data_file_path = ibdata1:128M:autoextend innodb_file_io_threads = 4 innodb_thread_concurrency = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 2M innodb_log_file_size = 4M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 innodb_file_per_table = 0 [mysqldump] quick max_allowed_packet = 2M [mysqld_safe] log-error=/data/3306/err_mysql_3306.err pid-file=/data/3306/mysqld.pid

[client] port            = 3307 socket          = /data/3307/mysql.sock [mysql] no-auto-rehash [mysqld] user    = mysql port    = 3307 socket  = /data/3307/mysql.sock basedir = /application/mysql datadir = /data/3307/data open_files_limit    = 1024 back_log = 600 max_connections = 800 max_connect_errors = 3000 table_cache = 614 external-locking = FALSE max_allowed_packet =8M sort_buffer_size = 1M join_buffer_size = 1M thread_cache_size = 100 thread_concurrency = 2 query_cache_size = 2M query_cache_limit = 1M query_cache_min_res_unit = 2k #default_table_type = InnoDB thread_stack = 192K #transaction_isolation = READ-COMMITTED tmp_table_size = 2M max_heap_table_size = 2M #long_query_time = 1 #log_long_format #log-error = /data/3307/error.log #log-slow-queries = /data/3307/slow.log pid-file = /data/3307/mysql.pid #log-bin = /data/3307/mysql-bin relay-log = /data/3307/relay-bin relay-log-info-file = /data/3307/relay-log.info binlog_cache_size = 1M max_binlog_cache_size = 1M max_binlog_size = 2M expire_logs_days = 7 key_buffer_size = 16M read_buffer_size = 1M read_rnd_buffer_size = 1M bulk_insert_buffer_size = 1M #myisam_sort_buffer_size = 1M #myisam_max_sort_file_size = 10G #myisam_max_extra_sort_file_size = 10G #myisam_repair_threads = 1 #myisam_recover lower_case_table_names = 1 skip-name-resolve slave-skip-errors = 1032,1062 replicate-ignore-db=mysql server-id = 3 innodb_additional_mem_pool_size = 4M innodb_buffer_pool_size = 32M innodb_data_file_path = ibdata1:128M:autoextend innodb_file_io_threads = 4 innodb_thread_concurrency = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 2M innodb_log_file_size = 4M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 innodb_file_per_table = 0 [mysqldump] quick max_allowed_packet = 2M [mysqld_safe] log-error=/data/3307/err_mysql_3307.err pid-file=/data/3307/mysqld.pid

                

配置MySQL資料庫多執行個體