Linux System Installation Mongodb database

First, through the RPM installation 1, System preparation

Our system version isCentOS Linux release 7.3.1611 (Core)

2. installation package Download

: http://mirrors.aliyun.com/mongodb/yum/redhat/, can be selected according to your own system version.
The path I chose: http://mirrors.aliyun.com/mongodb/yum/redhat/7/mongodb-org/3.2/x86_64/RPMS/.

The version I chose for MongoDB is the 3.2.6 package as follows:

mongodb-org-3.2.6-1.el7.x86_64.rpm
mongodb-org-mongos-3.2.6-1.el7.x86_64.rpm
mongodb-org-server-3.2.6-1.el7.x86_64.rpm
mongodb-org-shell-3.2.6-1.el7.x86_64.rpm
mongodb-org-tools-3.2.6-1.el7.x86_64.rpm

3. Start the installation

yum install *.rpm

4. Create Data Catalog

install -o mongod -g mongod -d /data/mongodb

5. Modify the configuration file/etc/mongod.conf

Modify DBPath and comment out Bindip

storage:  dbPath: /data/mongodb  journal:    enabled: truenet:  port: 27017#  bindIp: 127.0.0.1

6. Start MongoDB

systemctl start mongod

7. Check

[[email protected] ~]# netstat -tlnpActive Internet connections (only servers)Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      16640/sshd          tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1924/master         tcp        0      0 0.0.0.0:10050           0.0.0.0:*               LISTEN      16724/zabbix_agentd tcp        0      0 0.0.0.0:27017           0.0.0.0:*               LISTEN      11188/mongod        

8. Login to MongoDB

[[email protected] ~]# mongomongodb Shell version:3.2.6connecting To:testserver has startup warnings:2018-07-31t1 7:40:28.137+0800 I control [Initandlisten] 2018-07-31t17:40:28.137+0800 i control [initandlisten] * * warning:you is RU Nning on a NUMA machine.2018-07-31t17:40:28.137+0800 I CONTROL [initandlisten] * * We suggest launching Mongod Li Ke this to avoid performance problems:2018-07-31t17:40:28.137+0800 I CONTROL [initandlisten] * * Numactl--in Terleave=all Mongod [Other options]2018-07-31t17:40:28.138+0800 I CONTROL [Initandlisten] 2018-07-31t17:40:28.138+ 0800 I CONTROL [initandlisten] * * WARNING:/sys/kernel/mm/transparent_hugepage/enabled is ' always '. 2018-07-31t17 : 40:28.138+0800 i CONTROL [initandlisten] * * We suggest setting it to ' Never ' 2018-07-31t17:40:28.138+0800 i contro L [Initandlisten] 2018-07-31t17:40:28.138+0800 I CONTROL [initandlisten] * * WARNING:/sys/kernel/mm/transparent_ Hugepage/defrag is ' always '. 2018-07-31t17:40:28.138+0800 I control [initandlisten] * * We suggest setting it to ' Never ' 2018-07-31t17:40:28.138+0800 i control [init Andlisten] 2018-07-31t17:40:28.138+0800 I CONTROL [initandlisten] * * warning:soft rlimits too low. Rlimits set to 4096 processes, 64000 files. Number of processes should is at least 32000:0.5 times number of files.2018-07-31t17:40:28.138+0800 I CONTROL [Initandl  Isten]

From the middle we will see a lot of warnings, we hit to make changes.

1. Disable THP

Transparent Huge Pages (THP) has been introduced since the CENTOS6 release, which is enabled by default, starting with the CentOS7 version. Although THP is intended to improve memory performance, some database vendors recommend that you turn off THP directly (for example, Oracle, MariaDB, MongoDB, and so on), which may cause performance degradation.

First check the activation status of THP:

[[email protected] ~]# cat /sys/kernel/mm/transparent_hugepage/defrag[always] madvise never[[email protected] ~]# cat /sys/kernel/mm/transparent_hugepage/enabled[always] madvise never

This status indicates that all are enabled.

We can, of course, modify the above two files individually to disable THP,

Temporary Solutions
Remember to restart MongoDB

echo never >> /sys/kernel/mm/transparent_hugepage/enabledecho never >> /sys/kernel/mm/transparent_hugepage/defrag

Permanent effect
To edit a /etc/rc.d/rc.local file:

Add the following content:

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled fi if test -f /sys/kernel/mm/transparent_hugepage/defrag; then echo never > /sys/kernel/mm/transparent_hugepage/defrag fi

2. Rlimits setting

echo "mongod soft nofile 64000" >> /etc/security/limits.confecho "mongod hard nofile 64000" >> /etc/security/limits.confecho "mongod soft nproc 32000" >> /etc/security/limits.confecho "mongod hard nproc 32000" >> /etc/security/limits.conf

3, set Numactl

Since the startup script has already been determined, we have previously minimized the installation system, so we only need to install NUMACTL.

yum install numactl -y

When you're done, restart MongoDB.

Second, download the installation package 1, download the package

MongoDB provides a 64-bit installation package for each Linux distribution, and you can download the installation package on the website.
: https://www.mongodb.com/download-center#community

wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.0.0.tgz

2. Extract to the specified directory

tar -zxvf mongodb-linux-x86_64-rhel70-4.0.0.tgzmv mongodb-linux-x86_64-rhel70-4.0.0 /usr/local/mongodb

Linux System Installation Mongodb database