用python写了个数据迁移脚本，主要是利用从库将大的静态表导出表空间，载导入到目标实例中。

#!/usr/bin/env python3#-*- coding:utf8 -*-#author：zhanbin.liu#!!!!!DB必须同版本#python3环境 pip3 install pymysql paramikoimport os#from pathlib import Pathimport sysimport pymysqlimport paramiko#每次只能迁移一个DB下的表，到指定DB#GRANT SELECT, CREATE, RELOAD, ALTER, LOCK TABLES ON *.* TO 'data_migration'@'192.168.%' IDENTIFIED BY 'data_migration@123';tables='sqlauto_cluster,sqlauto_user' #以，分割的字符串，如a,b,ctableList = tables.split(',')sourceIp = '192.168.1.101'sourceDataBase = '/data/mysql/3306/data'sourceDbName = 'inception_web'sourceDataDir = os.path.join(sourceDataBase,sourceDbName)desIp = '192.168.1.102'desDataBase = '/data/mysql/3306/data'desDbName = 'inception_web'desDataDir = os.path.join(desDataBase,desDbName)# for table in tableList:# desFile = Path("%s/%s.ibd" %(desDataDir,table))# print(desFile)# if desFile.is_file():# print("ok")# else:# print("no")comUser = 'data_migration'comPwd = 'data_migration@123'comPort = 3306client = paramiko.SSHClient()client.set_missing_host_key_policy(paramiko.AutoAddPolicy())def table_judge(): print("table_judge") sourceTableExist = pymysql.connect(sourceIp,comUser,comPwd,sourceDbName,comPort,charset='utf8') desTableExist = pymysql.connect(desIp,comUser,comPwd,desDbName,comPort,charset='utf8') sourceTables = [] desTables = [] cursor_source = sourceTableExist.cursor() cursor_des = desTableExist.cursor() for table in tableList: #print(table) cursor_source.execute("select TABLE_NAME from information_schema.TABLES where TABLE_SCHEMA='%s' and TABLE_NAME='%s';" % (sourceDbName,table)) sourceTable_tmp = cursor_source.fetchall() cursor_des.execute("select TABLE_NAME from information_schema.TABLES where TABLE_SCHEMA='%s' and TABLE_NAME='%s';" % (desDbName,table)) desTable_tmp = cursor_des.fetchall() #print(desTable_tmp) if sourceTable_tmp is (): sourceTables.append(table) if desTable_tmp is not (): desTables.append(desTable_tmp[0][0]) sourceTableExist.close() desTableExist.close() s=d=0 if sourceTables != []: print('迁移源不存在将要迁移的表：',sourceIp,sourceDbName, sourceTables,' 请检查') s=1 if desTables != []: print('目标库存在将要迁移的表：',desIp,desDbName,desTables,' 请移除') d=1 if s == 1 or d == 1: sys.exit()def data_sync(): print('data_sync') db_source = pymysql.connect(sourceIp,comUser,comPwd,sourceDbName,comPort,charset='utf8') db_des = pymysql.connect(desIp,comUser,comPwd,desDbName,comPort,charset='utf8') cursor_db_source = db_source.cursor() cursor_db_des = db_des.cursor() for table in tableList: print("正在同步表：",table) cursor_db_source.execute("show create table %s;" % (table)) createTableSQL = cursor_db_source.fetchall()[0][1] print(createTableSQL) try: cursor_db_des.execute(createTableSQL) except Exception as error: print(error) cursor_db_source.execute("flush table %s with read lock;" % (table)) cursor_db_des.execute("alter table %s discard tablespace;" % (table)) client.connect(sourceIp, 22, 'root') stdin1, stdout1, stderr1 = client.exec_command("scp %s %s:%s " % (sourceDataDir+"/"+table+".ibd", desIp, desDataDir)) stdin2, stdout2, stderr2 = client.exec_command("scp %s %s:%s " % (sourceDataDir+"/"+table+".cfg", desIp, desDataDir)) a_e_1 = stderr1.readlines() a_e_2 = stderr2.readlines() if a_e_1 != [] or a_e_2 != []: print(a_e_1,a_e_2) sys.exit() client.close() client.connect(desIp, 22, 'root') stdin3, stdout3, stderr3 = client.exec_command("chown -R mysql.mysql %s*" % (desDataDir+"/"+table)) a_e_3 = stderr3.readlines() if a_e_3 != []: print(a_e_1, a_e_2) sys.exit() client.close() #cursor_db_source.execute("select sleep(10);") cursor_db_source.execute("unlock tables;") cursor_db_des.execute("alter table %s import tablespace;" % (table)) print("同步完成") cursor_db_source.close() cursor_db_des.close()def data_checksum(): print('data_checksum') db_source = pymysql.connect(sourceIp,comUser,comPwd,sourceDbName,comPort,charset='utf8') db_des = pymysql.connect(desIp,comUser,comPwd,desDbName,comPort,charset='utf8') cursor_db_source = db_source.cursor() cursor_db_des = db_des.cursor() for table in tableList: print("正在校验表：", table) cursor_db_source.execute("checksum table %s;" % (table)) ck_s = cursor_db_source.fetchall()[0][1] cursor_db_des.execute("checksum table %s;" % (table)) ck_d = cursor_db_des.fetchall()[0][1] if ck_s != ck_d: print("表不一致：",table) else: print("表一致：",table) cursor_db_source.close() cursor_db_des.close()if __name__ == "__main__": table_judge() data_sync() data_checksum() print('haha')