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0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 diff --git "a/content/zh/post/OMGZEXAL/openGauss 5.0 \345\215\225\350\212\202\347\202\271\345\256\211\350\243\205\351\203\250\347\275\262\344\270\216\344\275\277\347\224\250.md" "b/content/zh/post/OMGZEXAL/openGauss 5.0 \345\215\225\350\212\202\347\202\271\345\256\211\350\243\205\351\203\250\347\275\262\344\270\216\344\275\277\347\224\250.md" new file mode 100644 index 0000000000000000000000000000000000000000..cfed3d2c3794b79a9b2109cb59a8648d75bb5083 --- /dev/null +++ "b/content/zh/post/OMGZEXAL/openGauss 5.0 \345\215\225\350\212\202\347\202\271\345\256\211\350\243\205\351\203\250\347\275\262\344\270\216\344\275\277\347\224\250.md" @@ -0,0 +1,138 @@ +@[toc] +# 1.环境准备 + +##### 1.1 安装依赖包文件 + +`[root@localhost ~]# yum install libaio-devel flex bison ncurses-devel glibc-devel patch redhat-lsb-core readline-devel libnsl` + +##### 1.2 关闭selinux和防火墙 +``` +vim /etc/selinux/config +``` +修改config文件，将SELINUX的值变为"disabled" +![01.png](image/1.png) +检测防火墙是否关闭 +``` +systemctl status firewalld +systemctl stop firewalld +systemctl disable firewalld +``` +![02.png](image/2.png) + +##### 1.3 设置字符集参数 + +vim /etc/profile在行尾添加 +``` +export LANG=en_US.UTF-8 +``` +##### 1.4 关闭swap + +`swapoff -a` (当内存较小时，可打开) + +##### 1.5 关闭RemoveIPC +(因为使用的环境为CentOS，默认关闭) +![03.png](image/3.png) + + + +# 2.安装 + +##### 2.1 创建工作用户和目录 +``` +[root@localhost opt]# useradd opengauss +[root@localhost opt]# mkdir -p /opt/opengauss +``` +##### 2.2 解压压缩包到安装目录、对目录授权并进行安装 +``` +[root@localhost tmp]# tar -jxf openGauss-5.0.0-CentOS-64bit.tar.bz2 -C /opt/opengauss +[root@localhost tmp]# cd /opt/opengauss/ +[root@localhost opengauss]# chmod 755 -R /opt/opengauss +[root@localhost opengauss]# chown -R opengauss /opt/opengauss +[root@localhost opengauss]# sudo -iu opengauss +[opengauss@localhost ~]$ cd /opt/opengauss/simpleInstall +[opengauss@localhost simpleInstall]$ sh install.sh -w "52@openGauss" &&source ~/.bashrc +``` +(注意：如果出现这种错误，请使用拥有root权限的用户执行`sysctl -w kernel.sem="250 85000 250 330"`即可) +![04.png](image/4.png) + +##### 2.3 检查进程，判断数据库是否启动 +``` +[opengauss@localhost ~]$ ps -ef | grep gauss +opengau+ 4946 1 3 11:20 ? 00:08:09 /opt/opengauss/bin/gaussdb -D /opt/opengauss/data/single_node +root 10843 3518 0 14:04 pts/0 00:00:00 sudo -iu opengauss +root 19289 3846 0 15:50 pts/1 00:00:00 sudo -iu opengauss +opengau+ 19387 19291 0 15:51 pts/1 00:00:00 grep --color=auto gauss +``` +也可以使用`gs_ctl status`命令，判断数据库状态： +``` +[opengauss@localhost ~]$ gs_ctl status +[2023-07-05 15:53:37.581][19531][][gs_ctl]: gs_ctl status,datadir is /opt/opengauss/data/single_node +gs_ctl: server is running (PID: 4946) +/opt/opengauss/bin/gaussdb "-D" "/opt/opengauss/data/single_node" +``` +##### 2.4 使用`gs_ctl notify`查看数据文件目录 +``` +[opengauss@localhost ~]$ gs_ctl notify +[2023-07-05 16:00:42.972][20104][][gs_ctl]: gs_ctl notify ,datadir is /opt/opengauss/data/single_node +[2023-07-05 16:00:42.973][20104][][gs_ctl]: the parameter of notify must be specified +``` + + +# 3.日常使用 + +##### 3.1 查看版本信息 +可以使用`select version()`查看数据库版本，使用`show server_version`查看pg基础版本 +![05.png](image/5.png) + +##### 3.2 常用命令   +`\l`查看当前有哪些数据库 +`\c`查看当前会话连接信息 +`\db`查看有哪些表空间 +`\du`查看用户和角色 +`\dn`查看当前数据库有哪些schema +`\dt`查看数据库中所有表 +![06.png](image/6.png) + +##### 3.3 创建用户并授予权限 +``` +openGauss=# CREATE USER test1 IDENTIFIED BY 'opengauss@2023'; +CREATE ROLE +openGauss=# ALTER USER test1 CREATEROLE; +ALTER ROLE +``` +![07.png](image/7.png) + +##### 3.4 创建表并插入数据 +``` +openGauss=# create table test0707(id CHAR(2) NOT NULL,update_user VARCHAR(20) NOT NULL); +CREATE TABLE +openGauss=# insert into test0707(id,update_user) values(1,'Bob'); +INSERT 0 1 +``` +![08.png](image/8.png) + +##### 3.5 创建模式 +创建了两个schema +``` +openGauss=# create schema t1 AUTHORIZATION test1; +CREATE SCHEMA +openGauss=# create schema t2 AUTHORIZATION test1; +CREATE SCHEMA +``` +![09.png](image/9.png) +在不同schema下创建表名均为test01的表，插入不同数据 +``` +openGauss=# create table t1.test01(id CHAR(2) NOT NULL,update_user VARCHAR(20) NOT NULL); +CREATE TABLE +openGauss=# insert into t1.test01(id,update_user) values(2,'Tom'); +INSERT 0 1 +openGauss=# create table t2.test01(id CHAR(2) NOT NULL,update_user VARCHAR(20) NOT NULL); +CREATE TABLE +openGauss=# insert into t2.test01(id,update_user) values(3,'Nancy'); +INSERT 0 1 +``` +![10.png](image/10.png) +通过结果可以看出，不切换对应schema，是无法进行查看其他schema的内容 + +# 尾语 +本文简单描述了openGauss的安装与使用，可供初学者进行参考，希望openGauss越做越好 \ No newline at end of file diff --git a/content/zh/post/OMGZEXAL/title/.keep b/content/zh/post/OMGZEXAL/title/.keep new file mode 100644 index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391