Deploy Oracle 12c based on CentOS7 installation

Introduction to deploying Oracle 12c based on CentOS7 installation

Oracle Database, also known as Oracle RDBMS, or Oracle. is a relational database management system of Oracle Corporation. is one of the most popular client/server (client/server) or B/s architectures in the current database. Oracle database 12c is the latest version. Oracle Database 12c introduces a new multi-tenant architecture that makes it easy to deploy and manage your database cloud.

Characteristics

1, the Complete data management function:

1)数据的大量性2)数据的保存的持久性3)数据的共享性4)数据的可靠性

2, complete relations of products:

1)信息准则---关系型DBMS的所有信息都应在逻辑上用一种方法，即表中的值显式地表示;2)保证访问的准则3)视图更新准则---只要形成视图的表中的数据变化了，相应的视图中的数据同时变化4)数据物理性和逻辑性独立准则

3. Distributed processing function:

ORACLE数据库自第5版起就提供了分布式处理能力，到第7版就有比较完善的分布式数据库功能了，一个ORACLE分布式数据库由oraclerdbms、sql*Net、SQL*CONNECT和其他非ORACLE的关系型产品构成。[2]

4, with Oracle can easily realize the operation of the Data Warehouse.

Advantages

High Availability

Strong scalability

Strong data security

Strong stability

CENTOS7 Installation Deploy Oracle 12c

• System Configuration

CentOS7 system
Memory: 4GB and above
SWAP:8GB (twice times the physical memory)
CPU: Dual Core
Install Oracle's folder free space to be 15GB or above, this machine is 20GB
Install package database, Flash (can be managed using Firefox Web page)

1. Installation action

• Turn off firewalls and enhanced security features

  systemctl disable firewalld.servicesystemctl stop firewalld.servicesetenforce 0

• Modify host name to Oracle

  vim /etc/hostname

  Hostname=oracle

• Add Local resolution

  echo "192.168.234.188 Oracle" >>/etc/hosts
  

• Modified hostname only reboot will take effect

  Reboot

2. Installing Oracle 12c

• Install the Software Environment pack

Yum-y install binutils compat-libcap1 compat-libstdc++-33 gcc gcc-c++ glibc glibc-devel ksh libaio libaio-devel libgcc li bstdc++ libstdc++-devel libxi libxtst make Sysstat UnixODBC unixodbc-devel

• modifying kernel parameters

Vim/etc/sysctl.conf

fs.aio-max-nr = 1048576   #异步IO请求数目 推荐值是：1048576 其实它等于 1024*1024 也就是 1024K 个fs.file-max = 6815744   #打开的文件句柄的最大数量,防止文件描述符耗尽的问题kernel.shmall = 2097152 #共享内存总量 页为单位,内存除以4K所得kernel.shmmax = 4294967295  kernel.shmmni = 4096kernel.sem = 250 32000 100 128  #SEMMSL: 每个信号集的最大信号数量 SEMMNS：用于控制整个 Linux 系统中信号的最大数 SEMOPM： 内核参数用于控制每个 semop 系统调用可以执行的信号操作的数量 SEMMNI ：内核参数用于控制整个 Linux 系统中信号集的最大数量net.ipv4.ip_local_port_range = 9000 65500 #用于向外连接的端口范围  net.core.rmem_default = 262144 #套接字接收缓冲区大小的缺省值net.core.rmem_max = 4194304   #套接字接收缓冲区大小的最大值net.core.wmem_default = 262144 #套接字发送缓冲区大小的缺省值net.core.wmem_max = 1048576   #套接字发送缓冲区大小的最大值

• Reload the configuration file

Sysctl-p

3. Configuration of the user environment

Groupadd Oinstall #创建oinstall组
Groupadd DBA #创建dba组
USERADD-G oinstall-g dba Oracle #创建oracle用户
passwd Oracle #密码123123
Mkdir-p/orc/app/oracle #创建oracle的工作目录
Chown-r oracle:oinstall/orc/app/#修改目录的属主, genus Group
Chmod-r 755/orc/app/oracle/#递归修改Oracle目录的权限

• Oracle User Environment Configuration

Vim/home/oracle/.bash_profile

umask 022                                       #权限（反掩码）ORACLE_BASE=/orc/app/oracle                          #Oracle的bash目录定义ORACLE_HOME=/orc/app/oracle/product/12.2.0/dbhome_1/             #Oracle的home目录定义ORACLE_SID=orcl              NLS_LANG="SIMPLIFIED CHINESE_CHINA".UTF8                       PATH=$PATH:$HOME/.local/bin:$HOME/bin:$ORACLE_HOME/bin             #重新定义系统环境变量               LANG=zh_CN.UTF-8                    #定义字符集export PATH LANG NLS_LANG ORACLE_BASE ORACLE_HOME ORACLE_SID                      #导入环境变量

4. Oracle User Resource Limits

• Enable the Pam_limits authentication module

Vim/etc/pam.d/login

     //末行添加session    required     /lib/security/pam_limits.sosession    required     pam_limits.so

Vim/etc/security/limits.conf

oracle        soft    nproc           2047          #单用户可使用的进程数量oracle        hard    nproc           16384oracle        soft    nofile          1024           #用户可打开的文件数量oracle        hard    nofile          65536oracle        soft    stack           10240         #堆栈设置

• Edit/etc/profile File

Vim/etc/profile

      //末行添加if [ $USER = "oracle" ] then   if [ $SHELL = "/bin/ksh" ]     then       ulimit -p 16384       #缓冲区大小       ulimit -p 65536   else     ulimit -u 16384 -n 65536    #进程数  文件数   fifi

Oracle 12c Installation (operation in graphical interface)

Xhost + #以root用户在图形化界面擦欧总
Su-oracle #切换用户至oracle用户
cd/abc/oracle/
Export display=:0.0 #调整分辨率
./runinstaller #开启执行安装

• Pop-up window handling during installation
• Execute the following script (root user required)

  /orc/app/orainventory/orainstroot.sh
  /orc/app/oracle/product/12.2.0/dbhome_1/root.sh

When the installation is complete, you will see the management address on the completion screen

• Web interface Management

Installing the Flash Plugin

RPM-IVH flash-player-npapi-26.0.0.131-release.x86_64.rpm

The user here is sys, password is the password that you set before

• Command line Login

Switch to Oracle User

Su-oracle

Deploy Oracle 12c based on CentOS7 installation