1.导出时指定字符集，报错Character set 'utf-8' is not a compiled character set and is not specifie .
--default-character-set=utf-8
这个是因为字符集错了。是--default-character-set=utf8
2，导出时提示warning，A partial dump from a server that has GTIDs
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction --databases test >3.sql Enter password: Warning: A partial dump from a server that has GTIDs will by default include the GTIDs of all transactions, even those that changed suppressed parts of the database. If you don't want to restore GTIDs, pass --set-gtid-purged=OFF. To make a complete dump, pass --all-databases --triggers --routines --events.
关于GTID是5.6以后，加入了全局事务 ID (GTID) 来强化数据库的主备一致性，故障恢复，以及容错能力。
官方给的：A global transaction identifier (GTID) is a unique identifier created and associated with each transaction committed on the server of origin (master).
所以可能是因为在一个数据库里面唯一，但是当导入其他的库就有可能重复。所有会有一个提醒。
可以通过添加--set-gtid-purged=off 或者–gtid-mode=OFF这两个参数设置。
个人认为是在导入库中重新生产GTID，而不用原来的。
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction --databases test >3.sql Enter password: Warning: A partial dump from a server that has GTIDs will by default include the GTIDs of all transactions, even those that changed suppressed parts of the database. If you don't want to restore GTIDs, pass --set-gtid-purged=OFF. To make a complete dump, pass --all-databases --triggers --routines --events.
[root@localhost data]# cat 3.sql
-- MySQL dump 10.13 Distrib 5.6.28, for Linux (x86_64) -- -- Host: localhost Database: test -- ------------------------------------------------------ -- Server version 5.6.28-debug-log /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; /*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */; /*!40103 SET TIME_ZONE='+00:00' */; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; SET @MYSQLDUMP_TEMP_LOG_BIN = @@SESSION.SQL_LOG_BIN; SET @@SESSION.SQL_LOG_BIN= 0; -- -- GTID state at the beginning of the backup -- SET @@GLOBAL.GTID_PURGED='42fe5059-32a7-11e6-9d29-000c29fcecda:1'; -- -- Position to start replication or point-in-time recovery from -- -- CHANGE MASTER TO MASTER_LOG_FILE='1.000003', MASTER_LOG_POS=358; -- -- Current Database: `test` -- CREATE DATABASE /*!32312 IF NOT EXISTS*/ `test` /*!40100 DEFAULT CHARACTER SET gbk */; USE `test`; -- -- Table structure for table `t` -- DROP TABLE IF EXISTS `t`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `t` ( `a` char(4) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `t` -- LOCK TABLES `t` WRITE; /*!40000 ALTER TABLE `t` DISABLE KEYS */; INSERT INTO `t` VALUES ('??'),('abc'); /*!40000 ALTER TABLE `t` ENABLE KEYS */; UNLOCK TABLES; -- -- Table structure for table `t1` -- DROP TABLE IF EXISTS `t1`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `t1` ( `a` char(4) DEFAULT NULL ) ENGINE=MEMORY DEFAULT CHARSET=latin1; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `t1` -- LOCK TABLES `t1` WRITE; /*!40000 ALTER TABLE `t1` DISABLE KEYS */; /*!40000 ALTER TABLE `t1` ENABLE KEYS */; UNLOCK TABLES; SET @@SESSION.SQL_LOG_BIN = @MYSQLDUMP_TEMP_LOG_BIN; /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */; /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */; -- Dump completed on 2016-07-20 8:01:38
不增加 GLOBAL.GTID_PURGED 变量
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction --set-gtid-purged=OFF --databases test >3.sql
导出数据库TEST中的t表 db1 table1
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction --set-gtid-purged=OFF test t >3.sql
指定TEST ,TEST1数据库的导出 --databases db1 db2
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction --set-gtid-purged=OFF --databases test test1 >3.sql Enter password:
全备数据库 --all-databases
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction --set-gtid-purged=OFF --all-databases
大数据量备份 -q
[root@localhost data]# mysqldump -uroot --master-data=2 -p --single-transaction -q --set-gtid-purged=OFF test t >3.sql Enter password: