{"id":1832,"date":"2020-07-01T06:08:27","date_gmt":"2020-06-30T22:08:27","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1832"},"modified":"2020-07-01T06:08:27","modified_gmt":"2020-06-30T22:08:27","slug":"mysql-auto-cnf-%e6%96%87%e4%bb%b6","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1832","title":{"rendered":"MySQL auto.cnf \u6587\u4ef6"},"content":{"rendered":"
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1. auto.cnf\u6587\u4ef6<\/div>\n<\/div>\n<\/div>\n<\/div>\n
MySQL\u6570\u636e\u76ee\u5f55\u4e2d\u901a\u5e38\u5b58\u5728\u4e00\u4e2a\u540d\u4e3aauto.cnf\u6587\u4ef6\uff0c\u5b58\u50a8\u4e86server-uuid\u7684\u503c\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
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[auto]\nserver-uuid=f2d0efd6-6ab7-11e8-8fdd-fa163eda7360\n<\/pre>\n<\/div>\n
MySQL\u542f\u52a8\u65f6\uff0c\u4f1a\u81ea\u52a8\u4ecedata_dir\/auto.cnf \u6587\u4ef6\u4e2d\u83b7\u53d6server-uuid\u503c\uff0c\u5e76\u5c06\u8fd9\u4e2a\u503c\u5b58\u50a8\u5728\u5168\u5c40\u53d8\u91cfserver_uuid\u4e2d\u3002\u5982\u679c\u8fd9\u4e2a\u503c\u6216\u8005\u8fd9\u4e2a\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48\u5c06\u4f1a\u751f\u6210\u4e00\u4e2a\u65b0\u7684uuid\u503c\uff0c\u5e76\u5c06\u8fd9\u4e2a\u503c\u4fdd\u5b58\u5728auto.cnf\u6587\u4ef6\u4e2d\u3002server-uuid\u4e0eserver-id\u4e00\u6837\uff0c\u7528\u4e8e\u6807\u8bc6MySQL\u5b9e\u4f8b\u5728\u96c6\u7fa4\u4e2d\u7684\u552f\u4e00\u6027\uff0c\u8fd9\u4e24\u4e2a\u53c2\u6570\u5728\u4e3b\u4ece\u590d\u5236\u4e2d\u5177\u6709\u91cd\u8981\u4f5c\u7528\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u4e3b\u3001\u4ece\u5e93\u7684server-uuid\u6216\u8005server-id\u7684\u503c\u4e00\u6837\uff0c\u5c06\u4f1a\u5bfc\u81f4\u4e3b\u4ece\u590d\u5236\u62a5\u9519\u4e2d\u65ad\u3002
\n\u5728\u4e3b\u5e93\u4e2d\u6267\u884cshow slave hosts; \u80fd\u591f\u770b\u5230\u4e3b\u3001\u4ece\u5e93\u7684server-id\u548c\u4ece\u5e93\u7684server-uuid\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
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mysql> show slave hosts;\n+-----------+------+------+-----------+--------------------------------------+\n| Server_id | Host | Port | Master_id | Slave_UUID                           |\n+-----------+------+------+-----------+--------------------------------------+\n| 170238777 |      | 3306 | 170238776 | 5a0280d4-6404-11e8-840e-fa163eab3dcf |\n| 170238778 |      | 3306 | 170238776 | 4db07c8a-6f01-11e8-bef6-fa163e767b9a |\n+-----------+------+------+-----------+--------------------------------------+\n2 rows in set (0.00 sec)\n<\/pre>\n<\/div>\n
\u5728\u4ece\u5e93\u4e2d\u6267\u884cshow slave status\\\\G\uff0c\u80fd\u591f\u770b\u5230\u4e3b\u5e93\u7684server-id\u548cserver-uuid\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
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                           ......\n             Master_Server_Id: 170238776\n                  Master_UUID: f2d0efd6-6ab7-11e8-8fdd-fa163eda7360\n             Master_Info_File: mysql.slave_master_info\n                    SQL_Delay: 0\n          SQL_Remaining_Delay: NULL\n      Slave_SQL_Running_State:\n           Master_Retry_Count: 86400\n                           ......\n<\/pre>\n<\/div>\n
2. \u4e3b\u3001\u4ece\u5e93server-uuid\u503c\u4e00\u6837\uff0c\u5bfc\u81f4\u4e3b\u4ece\u590d\u5236\u5f02\u5e38\u4e2d\u65ad<\/h2>\n
MySQL\u5728\u521d\u59cb\u5316\u7684\u65f6\u5019\uff0c\u4f1a\u53bb\u6570\u636e\u76ee\u5f55\u91cc\u7684auto.cnf\u6587\u4ef6\u8bfb\u53d6server-uuid\u53c2\u6570\uff0c\u5982\u679c\u6ca1\u6709auto.cnf\u6587\u4ef6\u6216\u8005\u6ca1\u6709\u8bfb\u5230server-uuid\u53c2\u6570\uff0c\u901a\u8fc7\u6267\u884cgenerate_server_uuid \u51fd\u6570\u751f\u6210\u4e00\u4e2a\u65b0\u7684uuid\u503c\uff0c\u5e76\u901a\u8fc7flush_auto_options\u51fd\u6570\u5c06server-uuid\u503c\u5199\u5165\u5230auto.cnf\u6587\u4ef6\u4e2d\u3002\u5177\u4f53\u7684\u51fd\u6570\u8c03\u7528\u53ca\u6e90\u7801\u6587\u4ef6\u5982\u4e0b\uff1a<\/p>\n
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main                       \/\/main.cc\nmysqld_main                \/\/mysqld.cc\ninit_server_auto_options   \/\/mysqld.cc\ngenerate_server_uuid       \/\/mysqld.cc\nflush_auto_options         \/\/mysqld.cc\n<\/pre>\n<\/div>\n
\u4e3b\u4ece\u590d\u5236\u65f6\uff0c\u5982\u679c\u4ece\u5e93\u53d1\u73b0\u5b83\u6240\u590d\u5236\u7684\u4e3b\u5e93\u7684uuid \u4e0e \u5b83\u81ea\u5df1\u7684uuid\u4e00\u6837\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4ece\u5e93\u7684I\/O\u7ebf\u7a0b\u4f1a\u76f4\u63a5\u62a5\u9519\u9000\u51fa\u3002MySQL\u63d0\u4f9b\u4e86\u989d\u5916\u53c2\u6570–replicate-same-server-id\uff0c\u7528\u4e8e\u6539\u53d8\u8fd9\u4e00\u9ed8\u8ba4\u884c\u4e3a\u3002\u5982\u679c\u8bbe\u7f6ereplicate-same-server-id\u4e3a1\uff0c\u5373\u4f7f\u4e3b\u4ece\u5e93uuid\u4e00\u6837\uff0c\u4e5f\u80fd\u6b63\u5e38\u590d\u5236\uff0c\u4f46\u662f\u4f1a\u4ea7\u751f\u610f\u60f3\u4e0d\u5230\u7684\u7ed3\u679c\uff0c\u5b9e\u9645\u4f7f\u7528\u4e2d\u4e5f\u5f88\u5c11\u4f1a\u8fd9\u4e48\u4f7f\u7528\u3002\u76f8\u5173\u4ee3\u7801\u5b9e\u73b0\u4f4d\u4e8erpl_slave.cc\u6587\u4ef6\u7684get_master_uuid\u51fd\u6570\u4e2d\uff0c\u5177\u4f53\u6e90\u7801\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n
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main                \/\/main.cc\nmysqld_main         \/\/mysqld.cc\nmysqld_socket_acceptor->connection_event_loop    \/\/mysqld.cc\nConnection_handler_manager::process_new_connection(Channel_info* channel_info)  \/\/connection_handler_manager.cc\nbool Per_thread_connection_handler::add_connection(Channel_info* channel_info)  \/\/connection_handler_per_thread.cc\nhandle_connection        \/\/connection_handler_per_thread.cc\ndo_command               \/\/sql_parse.cc\ndispatch_command         \/\/sql_parse.cc\nmysql_parse              \/\/sql_parse.cc\nmysql_execute_command    \/\/sql_parse.cc\nstart_slave_cmd          \/\/rpl_slave.cc\nstart_slave              \/\/rpl_slave.cc\nstart_slave_threads      \/\/rpl_slave.cc\nhandle_slave_io          \/\/rpl_slave.cc\nget_master_uuid          \/\/rpl_slave.cc<\/pre>\n<\/div>\n
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\/\/rpl_slave.cc\n\/\/static int get_master_uuid(MYSQL *mysql, Master_info *mi)\nchar query_buf[]= \\\"SELECT @@GLOBAL.SERVER_UUID\\\";\n...\nif (!mysql_real_query(mysql, STRING_WITH_LEN(query_buf)) &&\n      (master_res= mysql_store_result(mysql)) &&\n      (master_row= mysql_fetch_row(master_res)))\n  {\n    if (!strcmp(::server_uuid, master_row[0]) &&\n        !mi->rli->replicate_same_server_id)\n    {\n      errmsg= \\\"The slave I\/O thread stops because master and slave have  equal \\\"\n              \\\"MySQL server UUIDs; these UUIDs must be different for \\\"\n              \\\"replication to work.\\\";\n      mi->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,  ER(ER_SLAVE_FATAL_ERROR),\n                 errmsg);\n      \/\/ Fatal error\n      ret= 1;\n    }\n<\/pre>\n<\/div>\n
3. \u4e3b\u3001\u4ece\u5e93server-id\u503c\u4e00\u6837\uff0c\u540c\u6837\u5bfc\u81f4\u4e3b\u4ece\u590d\u5236\u5f02\u5e38\u4e2d\u65ad<\/h2>\n
\u5982\u679c\u4e3b\u4ece\u590d\u5236\u65f6\uff0c\u4ece\u5e93\u53d1\u73b0\u5b83\u6240\u590d\u5236\u7684\u4e3b\u5e93\u7684server_id \u4e0e \u5b83\u81ea\u5df1\u7684server_id\u4e00\u6837\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4ece\u5e93\u7684I\/O\u7ebf\u7a0b\u4e5f\u4f1a\u76f4\u63a5\u62a5\u9519\u9000\u51fa\u3002\u901a\u8fc7\u8bbe\u7f6e–replicate-same-server-id \u53c2\u6570\u4e3a1\uff0c\u53ef\u6539\u53d8\u8fd9\u4e00\u9ed8\u8ba4\u884c\u4e3a\u3002\u4ee3\u7801\u5b9e\u73b0\u5982\u4e0b\uff1a
\n\u4e0b\u9762\u662f\u6267\u884cstart slave;\u547d\u4ee4\u65f6\u7684\u51fd\u6570\u8c03\u7528\u5173\u7cfb\u3002<\/p>\n
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main                  \/\/main.cc\nmysqld_main           \/\/mysqld.cc\nmysqld_socket_acceptor->connection_event_loop    \/\/mysqld.cc\nConnection_handler_manager::process_new_connection(Channel_info* channel_info)    \/\/connection_handler_manager.cc\nbool Per_thread_connection_handler::add_connection(Channel_info* channel_info)    \/\/connection_handler_per_thread.cc\nhandle_connection                   \/\/connection_handler_per_thread.cc\ndo_command                          \/\/sql_parse.cc\ndispatch_command                    \/\/sql_parse.cc\nmysql_parse                         \/\/sql_parse.cc\nmysql_execute_command               \/\/sql_parse.cc\nstart_slave_cmd                     \/\/rpl_slave.cc\nstart_slave                         \/\/rpl_slave.cc\nstart_slave_threads                 \/\/rpl_slave.cc\nhandle_slave_io                     \/\/rpl_slave.cc\nget_master_version_and_clock        \/\/rpl_slave.cc\n<\/pre>\n<\/div>\n
\u4e0b\u9762\u662fMySQL\u4ece\u5e93\u542f\u52a8\u65f6\uff0c\u5982\u679cskip-slave-start\u4e3a0\uff0c\u4ece\u5e93\u81ea\u52a8\u542f\u52a8\u590d\u5236\u7ebf\u7a0b\u7684\u51fd\u6570\u8c03\u7528\u5173\u7cfb\u3002<\/p>\n
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main                                  \/\/main.cc\nmysqld_main                     \/\/mysqld.cc\ninit_slave                            \/\/rpl_slave.cc\nstart_slave_threads            \/\/rpl_slave.cc\nhandle_slave_io                 \/\/rpl_slave.cc\nget_master_version_and_clock    \/\/rpl_slave.cc\n<\/pre>\n<\/div>\n
\u6700\u7ec8\u90fd\u662f\u901a\u8fc7\u8c03\u7528get_master_version_and_clock\u51fd\u6570\uff0c\u6765\u5224\u65ad\u4e3b\u3001\u4ece\u5e93server-id\u662f\u5426\u76f8\u540c\u3002<\/p>\n
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\/\/ rpl_slave.cc\n\/\/ static int get_master_version_and_clock(MYSQL* mysql, Master_info* mi)\nif (!mysql_real_query(mysql, STRING_WITH_LEN(\\\"SELECT @@GLOBAL.SERVER_ID\\\")) &&\n      (master_res= mysql_store_result(mysql)) &&\n      (master_row= mysql_fetch_row(master_res)))\n  {\n    if ((::server_id == (mi->master_id= strtoul(master_row[0], 0, 10))) &&\n        !mi->rli->replicate_same_server_id)\n    {\n      errmsg= \\\"The slave I\/O thread stops because master and slave have equal \\\\\nMySQL server ids; these ids must be different for replication to work (or \\\\\nthe --replicate-same-server-id option must be used on slave but this does \\\\\nnot always make sense; please check the manual before using it).\\\";\n      err_code= ER_SLAVE_FATAL_ERROR;\n      sprintf(err_buff, ER(err_code), errmsg);\n      goto err;\n    }\n  }\n<\/pre>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"
1. auto.cnf\u6587\u4ef6 MySQL\u6570\u636e\u76ee\u5f55\u4e2d\u901a\u5e38\u5b58\u5728\u4e00\u4e2a\u540d\u4e3aauto.cnf\u6587\u4ef6\uff0c\u5b58\u50a8\u4e86server-uu …<\/p>\n
  MySQL auto.cnf \u6587\u4ef6<\/span> \u67e5\u770b\u5168\u6587 »<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"1. auto.cnf\u6587\u4ef6 MySQL\u6570\u636e\u76ee\u5f55\u4e2d\u901a\u5e38\u5b58\u5728\u4e00\u4e2a\u540d\u4e3aauto.cnf\u6587\u4ef6\uff0c\u5b58\u50a8\u4e86server-uu…","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1832"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1832"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1832\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1832"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}