在CentOS 6.5安装MariaDB(MySQL) 1.在官网获取mariaDB的安装包通xftp放到根目录下 2.展开MariaDB文件 tar xf mariadb-5.5.42-li
在CentOS 6.5安装MariaDB(MySQL)
1.在官网获取mariaDB的安装包通xftp放到根目录下
2.展开MariaDB文件
tar xf mariadb-5.5.42-linux-x86_64.tar.gz -C /usr/local
3.帮助文档位置
/usr/local/mariadb-5.5.42-linux-x86_64/INSTALL-BINARY
4.为数据库数据准备硬盘
fdisk /dev/sdb
pvcreate /dev/sdb1
vgcreate mysqlvg /dev/sdb1
lvcreate -l 1278 -n mydata mysqlvg
mke2fs -t ext4 -L MYDATA -b 4096 -m 3 /dev/mysqlvg/mydata
mkdir /mydata
vim /etc/fstab
mount -a
5.添加mysql组和用户
# groupadd -r mysql
# useradd -g mysql -r mysql
# id mysql
uid=498(mysql) gid=498(mysql) groups=498(mysql)
6.更改/mydata/data的属主属组
# chown -R mysql.mysql /mydata/data
7.为mysql文件夹做软链接
# ln -sv mariadb-5.5.42-linux-x86_64 mysql
8.为mysql文件夹内的所有文件更改属主属组权限
# chown -R root.mysql ./*
9.复制配置文件
mysql文件下support中的my-*.cnf是mysql的配置文件模板,根据不通的内存大小选择不通的模板
因为系统安装时默认安装mysql的库,所以会有mysql的配置文件.建议新建一个文件夹把模板放到里边.
# mkdir /etc/mysql
# cp support-files/my-large.cnf /etc/mysql/my.cnf
# vim /etc/mysql/my.cnf
在配置文件中填加数据文件目录
10.初始化数据库
# cd /usr/local/mysql/scripts
# scripts/mysql_install_db --user=mysql --datadir=/mydata/data
mysql数据库初始化完成,可以看到mysql的数据文件在指定位置生成了.mysql服务查出配置文件是依次查找多个不同位置,会合并多个不同文件的参数并以最后找到的配置文件为准.所以这里mysql使用的配置文件是/etc/mysql/my.cnf而不是/etc/my.cnf.
11.复制服务脚本
# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
把mysqld服务加到服务列表
# chkconfig --add mysqld
12.启动服务
可以看到mysql启动成功,3306端口也已经监听
13.把mysql脚本添加到PATH路径
# vim /etc/profile.d/mysql.sh
source一下mysql.sh文件后,发现使用mysql命令可以连接到MariaDB版本为5.5.42
14.头文件导出
# ln -sv /usr/local/mysql/include/ /usr/include/mysql
15.库文件导出
# vim /etc/ld.so.conf.d/mysql.conf
在文件中写上mysql的库文件的位置就可以
/usr/local/mysql/lib
用ldcongfig重新生成一下库文件搜索路径的缓存文件,发现可看到新版本的mysql库文件
在 CentOS/RHEL/Scientific Linux 6 下安装 LAMP (Apache with MariaDB and PHP)
MariaDB Proxy读写分离的实现
Linux下编译安装配置MariaDB数据库的方法
CentOS系统使用yum安装MariaDB数据库
安装MariaDB与MySQL并存
Ubuntu 上如何将 MySQL 5.5 数据库迁移到 MariaDB 10
[翻译]Ubuntu 14.04 (Trusty) Server 安装 MariaDB
MariaDB 的详细介绍:请点这里
MariaDB 的下载地址:请点这里
本文永久更新链接地址:
,
ACID attributes include atomicity, consistency, isolation and durability, and are the cornerstone of database design. 1. Atomicity ensures that the transaction is either completely successful or completely failed. 2. Consistency ensures that the database remains consistent before and after a transaction. 3. Isolation ensures that transactions do not interfere with each other. 4. Persistence ensures that data is permanently saved after transaction submission.

MySQL is not only a database management system (DBMS) but also closely related to programming languages. 1) As a DBMS, MySQL is used to store, organize and retrieve data, and optimizing indexes can improve query performance. 2) Combining SQL with programming languages, embedded in Python, using ORM tools such as SQLAlchemy can simplify operations. 3) Performance optimization includes indexing, querying, caching, library and table division and transaction management.

MySQL uses SQL commands to manage data. 1. Basic commands include SELECT, INSERT, UPDATE and DELETE. 2. Advanced usage involves JOIN, subquery and aggregate functions. 3. Common errors include syntax, logic and performance issues. 4. Optimization tips include using indexes, avoiding SELECT* and using LIMIT.

MySQL is an efficient relational database management system suitable for storing and managing data. Its advantages include high-performance queries, flexible transaction processing and rich data types. In practical applications, MySQL is often used in e-commerce platforms, social networks and content management systems, but attention should be paid to performance optimization, data security and scalability.

The relationship between SQL and MySQL is the relationship between standard languages and specific implementations. 1.SQL is a standard language used to manage and operate relational databases, allowing data addition, deletion, modification and query. 2.MySQL is a specific database management system that uses SQL as its operating language and provides efficient data storage and management.

InnoDB uses redologs and undologs to ensure data consistency and reliability. 1.redologs record data page modification to ensure crash recovery and transaction persistence. 2.undologs records the original data value and supports transaction rollback and MVCC.

Key metrics for EXPLAIN commands include type, key, rows, and Extra. 1) The type reflects the access type of the query. The higher the value, the higher the efficiency, such as const is better than ALL. 2) The key displays the index used, and NULL indicates no index. 3) rows estimates the number of scanned rows, affecting query performance. 4) Extra provides additional information, such as Usingfilesort prompts that it needs to be optimized.

Usingtemporary indicates that the need to create temporary tables in MySQL queries, which are commonly found in ORDERBY using DISTINCT, GROUPBY, or non-indexed columns. You can avoid the occurrence of indexes and rewrite queries and improve query performance. Specifically, when Usingtemporary appears in EXPLAIN output, it means that MySQL needs to create temporary tables to handle queries. This usually occurs when: 1) deduplication or grouping when using DISTINCT or GROUPBY; 2) sort when ORDERBY contains non-index columns; 3) use complex subquery or join operations. Optimization methods include: 1) ORDERBY and GROUPB


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Zend Studio 13.0.1
Powerful PHP integrated development environment

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Atom editor mac version download
The most popular open source editor