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mysqldump下令详解

Jun 07, 2016 pm 04:14 PM
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mysqldump命令详解 1.简介 mysqldump为MySQL逻辑备份工具,产生一系列SQL语句,之后重新执行以产生备份的库、表及数据。也可产生CSV、XML等式的数据。适用于各类引擎的表。 运行mysqldump需一定的权限。如,备份表的最低权限为select,备份视图需show view权

mysqldump命令详解

1.简介

mysqldump为MySQL逻辑备份工具,产生一系列SQL语句,之后重新执行以产生备份的库、表及数据。也可产生CSV、XML等格式的数据。适用于各类引擎的表。

运行mysqldump需一定的权限。如,备份表的最低权限为select,备份视图需show view权限,备份触发器需trigger权限。mysqldump的输出可能包含alter database语句,如,用于保持备份库的字符集,此时需要有备份库上的alter权限。若不使用—single-transaction选项则还需lock tables权限,不同的选项可能需要对应的不同的权限。相应的,载入备份文件也至少需与创建备份文件时相同的权限。

2.语法

备份一个或多个表:
shell>mysqldump [options] db_name [table_name……]

备份一个或多个库:
shell>mysqldump [options] –databases dbname……

备份所有数据库:
shell>mysqldump [options] –all-databases

3.性能与扩展性

提供了在恢复前查看并编辑备份文件的便捷性和灵活性。不适用于大数据量的备份(即使备份过程较快,但在恢复数据时因插入、建索引等操作会造成高昂I/O开销)。

对于大规模备份,考虑使用物理方法,如:mysqlbackup(适于InnoDB、MyISAM及其他表)、mysqlhotcopy(适于MyISAM表)、Xtrabackup(适于InnoDB及MyISAM表)、LVM(适于各类表)等。

4选项

mysqldump会依次从下列配置文件中读取默认:

1.   /etc/my.cnf

2.   /etc/mysql/my.cnf

3.   /usr/etc/my.cnf

4.   ~/.my.cnf

 

mysqldump仅从配置文件的下列节中读取默认选项:

?  [mysqldump]

?  [client]

 

mysqldump选项:

命令行

描述

--add-drop-database

在CREATE DATABASE前DROP DATABASE。

--add-drop-table

在CREATE TABLE前DROP TABLE。

--add-drop-trigger

在CREATE TRIGGER 前DROP TRIGGER。

--add-locks

在INSERT前后分别加LOCK TABLES和UNLOCK TABLES。

--all-databases

备份所有库中所有表。

--allow-keywords

允许列名包含关键字。

--apply-slave-statements

在CHANGE MASTER前加 STOP SLAVE在最后添加 START SLAVE。

--bind-address=ip_address

对于有多个网络接口的机器选择使用指定的接口连接MySQL。

--comments

为备份文件添加注释。

--compact

禁用结构化注释及首尾结构体。开启--skip-add-drop-table、--skip-add-locks、--skip-comments、--skip-disable-keys、--skip-set-charset以产生更紧促的输出。

--compatible=name[,name,...]

产生与其他数据库或者老版MySQL兼容的备份文件,可用的值有ansi, mysql323, mysql40, postgresql, oracle, mssql, db2, maxdb, no_key_options, no_table_options, no_field_options。可同时使用多个以逗号分隔的值。

--complete-insert

使用带有列名的完整INSERT。

--create-options

在CREATE TABLE中使用MySQL特定的表选项。

--databases

备份多个数据库,选项后跟多个库名。备份文件中会包含USE db_name。

--debug[=debug_options]

写debug日志。

--debug-check

程序退出时打印一些调试信息

--debug-info

程序退出时打印一些有关cpu和memory的统计信息。

--default-auth=plugin

指明要使用的客户端认证插件

--default-character-set=charset_name

设置默认字符集

--delayed-insert

使用INSERT DELAYED 而非INSERT。MySQL5.6.6中INSERT DELAYED已不被推荐使用,相应的该选项也将来未来的mysqldump中移除。

--delete-master-logs

在master上备份后删除其二进制日志。该选项会自动激活—master-data选项。

--disable-keys

对每个表在INSERT前后分别加/*!40000 ALTER TABLE `articles` DISABLE KEYS */和/*!40000 ALTER TABLE `articles` ENABLE KEYS */。可使从备份文件恢复数据更快,因为索引在所有行插入后创建。仅对于MyISAM表的非唯一索引。

--dump-date

若使用了—comments选项则会在末尾显示-- Dump completed on xxxxxx,以标记时间。

--dump-slave[=value]

会在输出结果添加包含master二进制文件和位置信息的CHANGE MASTER语句。与—master-data选项类似,但用于复制slave以建立另外的与其同master的slave。会开启—lock-all-tables除非使用了—single-transaction。会在dump前停止slave的SQL thread在dump后开始该线程。可与--apply-slave-statements、--include-master-host-port结合使用。

--events

为备份的数据库备份事件。

--extended-insert

使用包含多个值列表的多行INSERT。

--fields-enclosed-by=string

与—tab选项结合使用。指明输出文件中的filed以何种字符串enclosed,与 LOAD DATA INFILE对应的选项意义相同。

--fields-escaped-by

同上

--fields-optionally-enclosed-by=string

同上

--fields-terminated-by=string

同上

--flush-logs

在备份前刷新MySQL日志。需RELOAD权限。若同时备份多个数据库,如使用—all-database或—database,则对于每个备份的数据库都会刷新一次日志,除非使用了—master-data或—lock-all-tables,此时日志仅在锁定表时刷新一次。若想让备份和刷新日志同时进行需结合使用—lock-all-tables或—master-data。

--flush-privileges

在备份了mysql这个数据库后发出FLUSH PRIVILEGES语句。本分mysql库或依赖mysql库中数据的库时需使用。

--help

显示帮助信息

--hex-blob

将二进制列,如,BINARY,VARBINARY,BLOB,BIT备份为十六进制形式。

--host

要连接的主机

--ignore-table=db_name.tbl_name

指明不备份的表

--include-master-host-port

使用了--dump-slave时在CHANGE MASTER语句中加入MASTER_HOST和MASTER_PORT。

--insert-ignore

用INSERT IGNORE 而非INSERT ,以忽略重复的数据。

--lines-terminated-by=string

与—tab选项结合使用。与LOAD DATA INFILE的LINE意义相同。指明行由何种字符串terminated。

--lock-all-tables

通过在备份期前加read lock锁定所有库的所有表。会自动关闭—single-transaction和—lock-tables。

--lock-tables

对于备份的库在备份前锁定将被备份的属于该库的表。使用READ LOCAL锁定以允许MyIASM表的并发插入。对于事务型的表请使用—single-transaction而非—lock-tables。另外该选项不能保证备份文件上各数据库间的表在逻辑上是一致的,因为市委每个库单独锁定表。一些选项如—opt会自动开启—locak-tables,可通过使用在其后使用--skip-lock-tables规避。

--log-error=file_name

在给定文件中附加警告和错误信息。

--login-path=name

从.mylogin.cnf登录文件读取登录参数。可通过mysql_config_editor创建登录文件。

--master-data[=value]

在输出中添加二进制日志名和位置。会开启—lock-all-tables除非也是用了—single-transaction。会自动关闭—lock-tables。

--max_allowed_packet=value

可发送或接收的最大包分组长度。

--net_buffer_length=value

TCP/IP及socket通讯的buffer大小。

--no-autocommit

在INSERT前后添加set autocommit=0和commit。

--no-create-db

若使用了—all-databases或—databases,不在输出中添加CREATE DATABASE。

--no-create-info

不使用CREATE TABLE 重建备份的表。

--no-data

只备份结构不备份数据。

--no-set-names

同--skip-set-charset不设置charset。

--no-tablespaces

不在输出中使用CREATE LOG FILE和CREATE TABLESPACE。

--opt

--add-drop-table, --add-locks, --create-options, --quick, --extended-insert, --lock-tables, --set-charset,和--disable-keys几个选项合起来的简写形式。

--order-by-primary

将备份的表中的行按主键排序或者第一个唯一键排序。当备份MyISAM表且将被载入到InnoDB表时很有用,打包备份本身的时间会较长。

--password[=password]

连接主机的密码

--pipe

在Windows上通过命名管道连接server。

--plugin-dir=path

插件存放目录。

--port=port_num

通过主机所使用的端口。

--protocol=type

连接主机所使用的协议。

--quick

备份时逐行读取表而非一次全部行后缓冲在内存中。在备份大表时有用。

--quote-names

使用“`”包围数据库名、表名、列名等标识符。若使用了ANSI_QUOTES则用“””包围。特别的,可能需要在—compatible后开启该选项。

--replace

使用REPLACE而非INSERT。

--result-file=file

将结果输出带指定的文件。

--routines

备份routines(存储过程和函数)。

--set-charset

添加SET NAMES default_character_set。默认开启。

--set-gtid-purged=value

确定是否在结果中添加SET @@GLOBAL.GTID_PURGED。若为ON但在server中没有开启GTID则发生错误。若OFF则什么都不做。若AUTO则server中开启GTID那么添加上述语句,反之不加。

--single-transaction

在备份前设置事务隔离级别为REPEATABLE READ并向server发送START TRANSACTION语句。仅对事务型表如InnoDB有用。与--ock-tables互斥。对于大文件备份--single-transaction与--quick结合使用。

--skip-add-drop-table

禁用--add-drop-table。

--skip-add-locks

禁用--add-locks。

--skip-comments

禁用—comments。

--skip-compact

禁用—compact。

--skip-disable-keys

禁用—disable-keys。

--skip-extended-insert

禁用--extended-insert。

--skip-opt

禁用--skip-opt。

--skip-quick

禁用--quick。

--skip-quote-names

禁用--quote-names。

--skip-set-charset

禁用—set-charset。

--skip-triggers

不备份triggers

--skip-tz-utc

禁用-- tz-utc

--socket=path

连接本机server所使用的socket。

--ssl-ca=file_name

包含信任的SSL CAs列表的文件名。

--ssl-capath=dir_name

包含PEM格式的可信任SSL CA证书的目录。

--ssl-cert=file_name

用于建立安全连接的SSL证书文件的名字。

--ssl-cipher=cipher_list

一系列用于SSL加密的所允许的密码。

--ssl-crl=file_name

包含证书废止列表的文件名。

--ssl-crlpath=dir_name

包含证书废止列表的文件的目录。

--ssl-key=file_name

用于建立安全连接的SSL key文件名。

--ssl-verify-server-cert

The server's Common Name value in its certificate is verified against the host name used when connecting to the server

--tab=path

对于每个备份的表mysqldump创建一个包含CREATE TABLE语句的tbl_name.sql,而被连接的server会创建一个由tab键分隔的包含相应数据的tbl_name.txt。选项值为将被写入的目录。当mysqldump与mysqld处于同一主机时使用。否则tbl_name.txt文件会被写入远程主机相应的目录。当使用了—databases或—all-databases时该选项不适用。

--tables

覆盖--databases 或 -B 选项。该选项后的名称参数均被认为是表名。

--triggers

为每个备份的表备份trigger。

--tz-utc

在备份文件中添加SET TIME_ZONE='+00:00'。

--user=user_name

连接server所使用的用户名

--verbose

详细模式。

--version

显示版本信息并退出。t

--where='where_condition'

仅备份与where条件中匹配的行。

--xml

产生XML格式的输出。

 

 命令行选项对应的配置文件及默认值

命令行

配置文件

默认值

引入版本

--add-drop-database

add-drop-database

FALSE

 

--add-drop-table

add-drop-table

TRUE

 

--add-drop-trigger

add-drop-trigger

FALSE

 

--add-locks

add-locks

TRUE

 

--all-databases

all-databases

FALSE

 

--allow-keywords

allow-keywords

FALSE

 

--apply-slave-statements

apply-slave-statements

FALSE

 

--bind-address=ip_address

bind-address

NO

 

--comments

comments

TRUE

 

--compact

compact

FALSE

 

--compatible=name[,name,...]

compatible

NO

 

--complete-insert

complete-insert

FALSE

 

--create-options

create-options

TRUE

 

--databases

databases

FALSE

 

--debug[=debug_options]

debug

FALSE

 

--debug-check

debug-check

FALSE

 

--debug-info

debug-info

FALSE

 

--default-auth=plugin

default-auth=plugin

NO

 

--default-character-set=charset_name

default-character-set

utf8

 

--delayed-insert

delayed-insert

FALSE

 

--delete-master-logs

delete-master-logs

FALSE

 

--disable-keys

disable-keys

TRUE

 

--dump-date

dump-date

TRUE

 

--dump-slave[=value]

dump-slave

0

 

--events

events

FALSE

 

--extended-insert

extended-insert

TRUE

 

--fields-enclosed-by=string

fields-enclosed-by

NO

 

--fields-escaped-by

fields-escaped-by

NO

 

--fields-optionally-enclosed-by=string

fields-optionally-enclosed-by

NO

 

--fields-terminated-by=string

fields-terminated-by

NO

 

--flush-logs

flush-logs

FALSE

 

--flush-privileges

flush-privileges

FALSE

 

--help

 

 

 

--hex-blob

hex-blob

FALSE

 

--host

host

NO

 

--ignore-table=db_name.tbl_name

ignore-table

NO

 

--include-master-host-port

include-master-host-port

FALSE

 

--insert-ignore

insert-ignore

FALSE

 

--lines-terminated-by=string

lines-terminated-by

NO

 

--lock-all-tables

lock-all-tables

FALSE

 

--lock-tables

lock-tables

TRUE

 

--log-error=file_name

log-error

NO

 

--login-path=name

 

NO

5.6.6

--master-data[=value]

master-data

0

 

--max_allowed_packet=value

max_allowed_packet

25165824

 

--net_buffer_length=value

net_buffer_length

1046528

 

--no-autocommit

no-autocommit

FALSE

 

--no-create-db

no-create-db

FALSE

 

--no-create-info

no-create-info

FALSE

 

--no-data

no-data

FALSE

 

--no-set-names

no-set-names

FALSE

 

--no-tablespaces

no-tablespaces

FALSE

 

--opt

opt

TRUE

 

--order-by-primary

order-by-primary

FALSE

 

--password[=password]

password

NO

 

--pipe

 

NO

 

--plugin-dir=path

plugin-dir=path

NO

 

--port=port_num

port

0

 

--protocol=type

protocol

 

 

--quick

quick

TRUE

 

--quote-names

quote-names

TRUE

 

--replace

replace

FALSE

 

--result-file=file

result-file

NO

 

--routines

routines

FALSE

 

--set-charset

set-charset

TRUE

 

--set-gtid-purged=value

set-gtid-purged

 

5.6.9

--single-transaction

single-transaction

FALSE

 

--skip-add-drop-table

skip-add-drop-table

FALSE

 

--skip-add-locks

skip-add-locks

FALSE

 

--skip-comments

skip-comments

FALSE

 

--skip-compact

skip-compact

TRUE

 

--skip-disable-keys

skip-disable-keys

FALSE

 

--skip-extended-insert

skip-extended-insert

FALSE

 

--skip-opt

skip-opt

FALSE

 

--skip-quick

skip-quick

FALSE

 

--skip-quote-names

skip-quote-names

FALSE

 

--skip-set-charset

skip-set-charset

FALSE

 

--skip-triggers

skip-triggers

FALSE

 

--skip-tz-utc

skip-tz-utc

FALSE

 

--socket=path

socket

NO

 

--ssl-ca=file_name

ssl-ca

NO

 

--ssl-capath=dir_name

ssl-capath

NO

 

--ssl-cert=file_name

ssl-cert

NO

 

--ssl-cipher=cipher_list

ssl-cipher

NO

 

--ssl-crl=file_name

ssl-crl

NO

5.6.3

--ssl-crlpath=dir_name

ssl-crlpath

NO

5.6.3

--ssl-key=file_name

ssl-key

NO

 

--ssl-verify-server-cert

ssl-verify-server-cert

NO

 

--tab=path

tab

NO

 

--tables

tables

NO

 

--triggers

triggers

TRUE

 

--tz-utc

tz-utc

TRUE

 

--user=user_name

user

NO

 

--verbose

 

FALSE

 

--version

 

TRUE

 

--where='where_condition'

where

NO

 

--xml

xml

NO

 

 

上述选项可大致分为以下几个方面(有些选项有简写形式)便于记忆:

?  连接选项

l  --bind-address=ip_address

l  --compress,-C

l  --default-auth=plugin

l  --password[=password],-p[password]

l  --pipe,-W

l  --plugin-dir=path

l  --port=port_num,-P port_num

l  --protocol={TCP|SOCKET|PIPE|MEMORY}

l  --socket=path,-S path

l  --ssl*

l  --user=user_name,-u user_name

l  max_allowed_packet

l  net_buffer_length


?  DDL选项

l  --add-drop-database

l  --add-drop-table

l  --add-drop-trigger

l  --all-tablespaces,-Y

l  --no-create-db,-n

l  --no-create-info,-t

l  --no-tablespaces,-y

l  --replace

?  Debug选项

l  --allow-keywords

l  --comments,-i

l  --debug[=debug_options],-# [debug_options]

l  --debug-check

l  --debug-info

l  --dump-date

l  --force,-f

l  --log-error=file_name

l  --skip-comments

l  --verbose,-v


?  帮助选项

l  --help,-?

l  --version,-V


?  国际化选项

l  --character-sets-dir=path

l  --default-character-set=charset_name

l  --no-set-names,-N

l  --set-charset


?  复制选项

l  --apply-slave-statements

l  --delete-master-logs

l  --dump-slave[=value]

l  --include-master-host-port

l  --master-data[=value]

l  --set-gtid-purged=value


?  格式选项

l  --compact

l  --compatible=name

l  --complete-insert,-c

l  --create-options

l  --fields-terminated-by=...,--fields-enclosed-by=..., --fields-optionally-enclosed-by=...,--fields-escaped-by=...

l  --hex-blob

l  --lines-terminated-by=...

l  --quote-names,-Q

l  --result-file=file_name,-r file_name

l  --tab=path,-T path

l  --tz-utc

l  --xml,-X


?  过滤选项

l  --all-databases,-A

l  --databases,-B

l  --events,-E

l  --ignore-table=db_name.tbl_name

l  --no-data,-d

l  --routines,-R

l  --tables

l  --triggers

l  --skip-triggers

l  --where='where_condition',-w 'where_condition'


?  性能选项

l  --delayed-insert

l  --disable-keys,-K

l  --extended-insert,-e

l  --insert-ignore

l  --opt

l  --quick,-q

l  --skip-opt


?  事务选项

l  --add-locks

l  --flush-logs,-F

l  --flush-privileges

l  --lock-all-tables,-x

l  --lock-tables,-l

l  --no-autocommit

l  --order-by-primary

l  --single-transaction


?  选项组

l  --compact

l  --opt


参考

http://dev.mysql.com/doc/refman/5.6/en/mysqldump.html#option_mysqldump_protocol

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This article will introduce readers to how to use the command prompt (CommandPrompt) to find the physical address (MAC address) of the network adapter in Win11 system. A MAC address is a unique identifier for a network interface card (NIC), which plays an important role in network communications. Through the command prompt, users can easily obtain the MAC address information of all network adapters on the current computer, which is very helpful for network troubleshooting, configuring network settings and other tasks. Method 1: Use "Command Prompt" 1. Press the [Win+X] key combination, or [right-click] click the [Windows logo] on the taskbar, and in the menu item that opens, select [Run]; 2. Run the window , enter the [cmd] command, and then

Detailed explanation of obtaining administrator rights in Win11 Detailed explanation of obtaining administrator rights in Win11 Mar 08, 2024 pm 03:06 PM

Windows operating system is one of the most popular operating systems in the world, and its new version Win11 has attracted much attention. In the Win11 system, obtaining administrator rights is an important operation. Administrator rights allow users to perform more operations and settings on the system. This article will introduce in detail how to obtain administrator permissions in Win11 system and how to effectively manage permissions. In the Win11 system, administrator rights are divided into two types: local administrator and domain administrator. A local administrator has full administrative rights to the local computer

Super practical! Sar commands that will make you a Linux master Super practical! Sar commands that will make you a Linux master Mar 01, 2024 am 08:01 AM

1. Overview The sar command displays system usage reports through data collected from system activities. These reports are made up of different sections, each containing the type of data and when the data was collected. The default mode of the sar command displays the CPU usage at different time increments for various resources accessing the CPU (such as users, systems, I/O schedulers, etc.). Additionally, it displays the percentage of idle CPU for a given time period. The average value for each data point is listed at the bottom of the report. sar reports collected data every 10 minutes by default, but you can use various options to filter and adjust these reports. Similar to the uptime command, the sar command can also help you monitor the CPU load. Through sar, you can understand the occurrence of excessive load

Where is hyperv enhanced session mode? Tips for enabling or disabling Hyper-V enhanced session mode using commands in Win11 Where is hyperv enhanced session mode? Tips for enabling or disabling Hyper-V enhanced session mode using commands in Win11 Feb 29, 2024 pm 05:52 PM

In Win11 system, you can enable or disable Hyper-V enhanced session mode through commands. This article will introduce how to use commands to operate and help users better manage and control Hyper-V functions in the system. Hyper-V is a virtualization technology provided by Microsoft. It is built into Windows Server and Windows 10 and 11 (except Home Edition), allowing users to run virtual operating systems in Windows systems. Although virtual machines are isolated from the host operating system, they can still use the host's resources, such as sound cards and storage devices, through settings. One of the key settings is to enable Enhanced Session Mode. Enhanced session mode is Hyper

Detailed explanation of division operation in Oracle SQL Detailed explanation of division operation in Oracle SQL Mar 10, 2024 am 09:51 AM

Detailed explanation of division operation in OracleSQL In OracleSQL, division operation is a common and important mathematical operation, used to calculate the result of dividing two numbers. Division is often used in database queries, so understanding the division operation and its usage in OracleSQL is one of the essential skills for database developers. This article will discuss the relevant knowledge of division operations in OracleSQL in detail and provide specific code examples for readers' reference. 1. Division operation in OracleSQL

How to delete win11 widgets? One command to uninstall Windows 11 widgets function tips How to delete win11 widgets? One command to uninstall Windows 11 widgets function tips Apr 11, 2024 pm 05:19 PM

Widgets are a new feature of the Win11 system. They are turned on by default. However, it is inevitable that some users do not use widgets very much and want to disable them because they take up space. So how should they do this? The editor below will teach you how to operate it, and you can try it out. What are widgets? Widgets are small cards that display dynamic content from your favorite apps and services on your Windows desktop. They appear on the widget board, where you can discover, pin, unpin, arrange, resize, and customize widgets to reflect your interests. The widget board is optimized to display relevant widgets and personalized content based on usage. Open the widget panel from the left corner of the taskbar, where you can see live weather

How to use LSOF to monitor ports in real time How to use LSOF to monitor ports in real time Mar 20, 2024 pm 02:07 PM

LSOF (ListOpenFiles) is a command line tool mainly used to monitor system resources similar to Linux/Unix operating systems. Through the LSOF command, users can get detailed information about the active files in the system and the processes that are accessing these files. LSOF can help users identify the processes currently occupying file resources, thereby better managing system resources and troubleshooting possible problems. LSOF is powerful and flexible, and can help system administrators quickly locate file-related problems, such as file leaks, unclosed file descriptors, etc. Via LSOF Command The LSOF command line tool allows system administrators and developers to: Determine which processes are currently using a specific file or port, in the event of a port conflict

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