# 先安装 epel 源
$ yum install -y epel-release

# 再安装jemalloc
$ yum -y install jemalloc jemalloc-devel

$ cat /etc/ld.so.conf
/usr/local/lib64/

$ ldconfig

$ ldconfig -p | grep libjemalloc
        libjemalloc.so.1 (libc6,x86-64) => /usr/local/lib64/libjemalloc.so.1
        libjemalloc.so (libc6,x86-64) => /usr/local/lib64/libjemalloc.so

#首先，查找GreatSQL
$ yum search GreatSQL
...
greatsql.src : GreatSQL: a high performance, highly reliable, easy to use, and high security database
greatsql-client.x86_64 : GreatSQL - Client
greatsql-debuginfo.x86_64 : Debug information for package greatsql
greatsql-debugsource.x86_64 : Debug sources for package greatsql
greatsql-devel.x86_64 : GreatSQL - Development header files and libraries
greatsql-icu-data-files.x86_64 : GreatSQL packaging of ICU data files
greatsql-mysql-config.x86_64 : GreatSQL config
greatsql-mysql-router.x86_64 : GreatSQL MySQL Router
greatsql-server.x86_64 : GreatSQL: a high performance, highly reliable, easy to use, and high security database that can be used to replace MySQL or Percona
                        : Server.
greatsql-shared.x86_64 : GreatSQL - Shared libraries
greatsql-test.x86_64 : Test suite for the GreatSQL

#然后安装
$ yum install -y --allowerasing greatsql-client greatsql-devel greatsql-icu-data-files greatsql-server greatsql-shared

$ systemctl status mysqld
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
...
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 1137698 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
 Main PID: 1137732 (mysqld)
   Status: "Server is operational"
    Tasks: 39 (limit: 149064)
   Memory: 336.7M
   CGroup: /system.slice/mysqld.service
           └─1137732 /usr/sbin/mysqld
...

# 新建 /data/GreatSQL 空目录，并修改目录所有者
$ mkdir -p /data/GreatSQL
$ chown -R mysql:mysql /data/GreatSQL

# 重启mysqld服务，即自行完成重新初始化
$ systemctl restart mysqld

$ grep root /data/GreatSQL/error.log
[Note] [MY-010454] [Server] A temporary password is generated for root@localhost: dt_)MtExl594

$ mysql -uroot -p'dt_)MtExl594'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.32-27

Copyright (c) 2021-2021 GreatDB Software Co., Ltd
Copyright (c) 2009-2021 Percona LLC and/or its affiliates
Copyright (c) 2000, 2021, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> \s
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql>

mysql> ALTER USER USER() IDENTIFIED BY 'GreatSQL-8032~%';
Query OK, 0 rows affected (0.02 sec)

#创建一个新用户GreatSQL，只允许从192.168.0.0/16网络连入，密码是 GreatSQL-2025
mysql> CREATE USER GreatSQL@'192.168.0.0/16' IDENTIFIED BY 'GreatSQL-2025';
Query OK, 0 rows affected (0.06 sec)

#创建一个新的用户库，并对GreatSQL用户授予读写权限
mysql> CREATE DATABASE GreatSQL;
Query OK, 1 row affected (0.03 sec)

mysql> GRANT ALL ON GreatSQL.* TO GreatSQL@'192.168.0.0/16';
Query OK, 0 rows affected (0.03 sec)

$ mysql -h192.168.1.10 -uGreatSQL -p'GreatSQL-2025'
...
# 切换到GreatSQL数据库下
mysql> use GreatSQL;
Database changed

# 创建新表
mysql> CREATE TABLE t1(id INT PRIMARY KEY);
Query OK, 0 rows affected (0.07 sec)

# 写入测试数据
mysql> INSERT INTO t1 SELECT RAND()*1024;
Query OK, 1 row affected (0.05 sec)
Records: 1  Duplicates: 0  Warnings: 0

# 查询数据
mysql> SELECT * FROM t1;
+-----+
| id  |
+-----+
| 203 |
+-----+
1 row in set (0.00 sec)