MySQL8.0初體驗

MySQL8.0的官方社區開源版出來有段時間了，而percona的8.0版本還沒有正式對外發佈（已發佈測試版），一直以來也沒安裝體驗下這個號稱質的飛躍的版本，今天正好有些時間就下了安裝體驗體驗。

一、MySQL8.0下載

下載地址：https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz

二、安裝環境

三、MySQL8.0安裝

官方參考：https://dev.mysql.com/doc/refman/8.0/en/binary-installation.html

1.軟體下載

[root@node tools]# wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz

2.依賴包安裝

[root@node mysql]# yum search libaio
[root@node mysql]# yum install libaio
3.用戶創建
[root@node mysql]# groupadd mysql
[root@node mysql]# useradd -r -g mysql -s /bin/false mysql

4.解壓縮安裝包

[root@node mysql]# cd /usr/local
[root@node mysql]# tar -xvf mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz

5.規劃軟體和數據文件目錄
[root@node tools]# mv mysql-8.0.13-linux-glibc2.12-x86_64 /usr/local/mysql
[root@node mysql]# cd /usr/local/mysql
[root@node mysql]# mkdir -p /data/mysql/data

6.修改屬主許可權
[root@node mysql]# chown -R mysql:mysql /data/mysql/data
[root@node mysql]# chmod -R 750 /data/mysql/data

7.資料庫初始化
[root@node mysql]# bin/mysqld --initialize --user=mysql  --datadir=/data/mysql/data
2018-11-12T02:49:23.293863Z 0 [System] [MY-013169] [Server] /usr/local/mysql/bin/mysqld (mysqld 8.0.13) initializing of server in progress as process 24839
2018-11-12T02:49:26.840424Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: Vxxx1n%Mj7uZ
2018-11-12T02:49:29.671663Z 0 [System] [MY-013170] [Server] /usr/local/mysql/bin/mysqld (mysqld 8.0.13) initializing of server has completed
8.ssl部署
[root@node mysql]# bin/mysql_ssl_rsa_setup
Generating a 2048 bit RSA private key
.......+++
............................+++
writing new private key to 'ca-key.pem'
-----
Generating a 2048 bit RSA private key
...........................................+++
..+++
writing new private key to 'server-key.pem'
-----
Generating a 2048 bit RSA private key
..................................................................+++
...................+++
writing new private key to 'client-key.pem'
-----
9.啟動資料庫
[root@node mysql]# bin/mysqld_safe --user=mysql --datadir=/data/mysql/data &
[1] 25195
[root@node mysql]# Logging to '/data/mysql/data/node.err'.
2018-11-12T02:51:59.390239Z mysqld_safe Starting mysqld daemon with databases from /data/mysql/data
10.連接資料庫
[root@node mysql]# mysql -uroot -p'Vjk01n%Mj7uZ'  -hlocalhost

mysql> select user,host from mysql.user;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

11.修改資料庫初始密碼

mysql> alter user root@'localhost' identified by 'xxxx';
Query OK, 0 rows affected (0.07 sec)
12.資料庫查詢
mysql> select user,host from mysql.user;   
+------------------+-----------+
| user             | host      |
+------------------+-----------+
| mysql.infoschema | localhost |
| mysql.session    | localhost |
| mysql.sys        | localhost |
| root             | localhost |
+------------------+-----------+
4 rows in set (0.00 sec)
13.MySQL啟動服務配置
[root@node mysql]# cp -rp support-files/mysql.server  /etc/init.d/mysqld

[root@node data]# chkconfig  --add mysqld
[root@node mysql]# vi /etc/my.cnf

[root@node ~]# vi /root/.bash_profile
PATH=$PATH:$HOME/bin:/usr/local/sysbench/bin:/usr/local/mysql/bin/
[root@node ~]# source ~/.bash_profile
14.殺掉MySQL進程，通過service服務重啟資料庫
[root@node data]# service mysqld start
Starting MySQL..................                           [  OK  ]

至此MySQL8.0二進位包資料庫安裝完畢，開始體驗其功能。
四、MySQL8.0功能體驗

 https://www.mysql.com/why-mysql/white-papers/whats-new-mysql-8-0/

MySQL8.0號稱快於5.7歷史版本2倍的速度（MySQL 8.0: Up to 2x Faster）