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: