Install Damon database

One 、 Basic hardware requirements

1.CPU 

Intel Pentium 4 Above processor

2. Memory   

Minimum memory recommended for database installation 1g
Linux The server swap Partition to physical memory 1.5 More than times

3. Hard disk

Divide the disk space according to the requirements , For data storage . Install the dream program , If you need to record a large number of databases SQL journal , Need to expand the partition /tmp Temporary directory at least 600M.

Two 、 Dameng software

DM8 Development Edition

Winning Qilin

3、 ... and 、 Installation steps

Create a dmdba user , Installed in the dm8 Under the folder

[[email protected] /]# mkdir -p /dm8

1. establish dmdba user

[[email protected] /]# groupadd dinstall 
[[email protected] /]# useradd -g dinstall dmdba
[[email protected] /]# passwd dmdba 
[[email protected] /]# chown dmdba:dinstall -R /dm8

 chown to grant authorization , Be sure to operate , Otherwise, there will be no permission behind , You have to come back and do it .

2. Set the maximum number of open files

Restart the server to take effect ：

[[email protected] /]# vi /etc/security/limits.confdmdba

dmdba soft nofile 4096

dmdba hard nofile 65536

If you can't write it in , You check whether it is used root user

Provisional entry into force ：

[[email protected] /]# ulimit -n 65536

3. Graphical interface installation

I usually execute the following commands in the location where the installation package is located

[[email protected] dmdba]# mount -o loop dm8_20201107_x86_rh7_64_ent_8.1.1.144.iso /mnt
mount: /dev/loop0  Write protect , Will mount... As read-only 

[[email protected] dmdba]# su - dmdba
 Last login ： 5、 ... and  5 month  28 03:06:53 CST 2021pts/1  On 
[[email protected] ~]$ cd /mnt
[[email protected] mnt]$ ./DMInstall.bin
 Unzip the installation program ......... 

---

problem 1. Decompress it for a while , Because I use Xshell, appear ：

Failed to initialize graphical interface , If the current monitor window does not support the graphical interface , Please enter the folder where the installation files are located and use "./DMInstall.bin -i" Command line installation .

resolvent ：

download XManager, Address https://www.onlinedown.net/soft/36382.htm

perhaps

yum  groupinstall x11

  Then execute the problem 2 Solve the order , If echo $DISPLAY No output , Open another connection to see .

If it doesn't work ,

export DISPLAY=:0.0
Set the temporary variable display

problem 2： I also install on the server dm, However, the graphical interface cannot be opened

[[email protected] mnt]$ echo $DISPLAY
:0
[[email protected] mnt]$ export DISPLAY=:0
[[email protected] mnt]$ xhost +
access control disabled, clients can connect from any host

  If you execute the order , Still can't open the graphical interface , Open a console again , Or switch users to see .

problem 3： Because I touch linux Not too many systems , So the following problems , It also bothered me for a long time ：

Setup temporary directory (/tmp) The available space is 465M. Setup requires at least 800M Temporary space for

-- Create a directory to put the temporary directory when installing the program 
[[email protected] /]# mkdir -p /tem1
[[email protected] /]# chown dmdba.disntall /tem1 -R

-- Configure environment variables 
[[email protected] ~]$ vi .bash_profile
export DM_INSTALL_TMPDIR=/tem1
-- Enable environment variables 
[[email protected] ~]$ source .bash_profile

---

After successfully entering the graphic ：

 

 

[[email protected] ~]$ su root
 password ：
[[email protected] dmdba]# /dm8/script/root/root_installer.sh
 Move  /dm8/bin/dm_svc.conf  To /etc Catalog 
 Modify server permissions 
 establish DmAPService service 
Created symlink from /etc/systemd/system/multi-user.target.wants/DmAPService.service to /usr/lib/systemd/system/DmAPService.service.
 Create services (DmAPService) complete 
 start-up DmAPService service 

  Finally, the installation succeeded ！