說明
PolarDB-X兼容MySQL的復制協議,因此可以將MySQL配置為PolarDB-X的Slave,在MySQL上執行如下示例中的SQL可以對從PolarDB-X到MySQL的復制鏈路進行管理,更多數據復制相關SQL可參看MySQL官方文檔。
如果您的PolarDB-X實例是兼容MySQL 5.7的版本,請使用5.7版本的MySQL作為PolarDB-X的Slave;如果您的PolarDB-X實例是兼容MySQL 8.0的版本,請使用8.0版本的MySQL作為PolarDB-X的Slave,推薦使用8.0.27及以上的版本。
如果您開通了binlog多流服務,當基于binlog多流服務配置MySQL作為PolarDB-X的Slave時,需要為每條binlog日志流分別創建復制鏈路,可以在單個MySQL實例上配置多條復制鏈路,也可以選擇為每條binlog日志流配置一個獨立的MySQL Slave實例。如果選擇在單個MySQL實例上配置多條復制鏈路,DDL的廣播復制是一個難點問題。
操作方法
創建復制鏈路
CHANGE MASTER TO option [, option] ... [ channel_option ] option: { MASTER_BIND = 'interface_name' | MASTER_HOST = 'host_name' | MASTER_USER = 'user_name' | MASTER_PASSWORD = 'password' | MASTER_PORT = port_num | PRIVILEGE_CHECKS_USER = {'account' | NULL} | REQUIRE_ROW_FORMAT = {0|1} | REQUIRE_TABLE_PRIMARY_KEY_CHECK = {STREAM | ON | OFF} | ASSIGN_GTIDS_TO_ANONYMOUS_TRANSACTIONS = {OFF | LOCAL | uuid} | MASTER_LOG_FILE = 'source_log_name' | MASTER_LOG_POS = source_log_pos | MASTER_AUTO_POSITION = {0|1} | RELAY_LOG_FILE = 'relay_log_name' | RELAY_LOG_POS = relay_log_pos | MASTER_HEARTBEAT_PERIOD = interval | MASTER_CONNECT_RETRY = interval | MASTER_RETRY_COUNT = count | SOURCE_CONNECTION_AUTO_FAILOVER = {0|1} | MASTER_DELAY = interval | MASTER_COMPRESSION_ALGORITHMS = 'value' | MASTER_ZSTD_COMPRESSION_LEVEL = level | MASTER_SSL = {0|1} | MASTER_SSL_CA = 'ca_file_name' | MASTER_SSL_CAPATH = 'ca_directory_name' | MASTER_SSL_CERT = 'cert_file_name' | MASTER_SSL_CRL = 'crl_file_name' | MASTER_SSL_CRLPATH = 'crl_directory_name' | MASTER_SSL_KEY = 'key_file_name' | MASTER_SSL_CIPHER = 'cipher_list' | MASTER_SSL_VERIFY_SERVER_CERT = {0|1} | MASTER_TLS_VERSION = 'protocol_list' | MASTER_TLS_CIPHERSUITES = 'ciphersuite_list' | MASTER_PUBLIC_KEY_PATH = 'key_file_name' | GET_MASTER_PUBLIC_KEY = {0|1} | NETWORK_NAMESPACE = 'namespace' | IGNORE_SERVER_IDS = (server_id_list) } channel_option: FOR CHANNEL channel server_id_list: [server_id [, server_id] ... ]
開始數據復制
START {SLAVE | REPLICA}
停止數據復制
STOP {SLAVE | REPLICA}
重置數據復制進程(需要先停止數據復制進程)
RESET {SLAVE | REPLICA} [ALL] [channel_option] channel_option: FOR CHANNEL channel
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