This document provides instructions for installing and configuring MongoDB version 0.1. It includes steps to tune the operating system by checking the kernel version and file system, setting file descriptor limits, tuning network parameters, disabling atime for data volumes, and disabling NUMA. It also describes adding a MongoDB user and group, setting process and file limits for that user, extracting the MongoDB program files, and moving them to the /opt/ directory.

1. MongoDB Program Installation Guide
Version Author Abstract Release date
0.1 Philip zhong Draft 2012-07-09
Tuning Operating System Parameters............................................................................................ 2
Install MongoDB Program ................................................................................................................. 3

2. Tuning Operating System Parameters
1. Check kernel version，make sure version great equal 2.6.32
#cat /proc/version
2. Check File System Version, make sure is EXT4
# df -Th -m|grep -i “ext4”
3. Set File Descriptor Limit and User process limit
#vi /etc/sysctl.conf
fs.file-max=65536
#vi /etc/security/limits.conf
* soft nproc 2047 --noproc max process
* hard nproc 16384
* soft nofile 1024 --nofile max files
* hard nofile 65536
4. Tuning network
#vi /etc/sysctl.conf
net.ipv4.ip_local_port_range=1024 65000
net.core.optmem_max = 262144
net.core.rmem_default = 262144
net.core.wmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_max = 262144
# sysctl -p
5. Turn off atime for the data volume

3. # mount -o noatime -o nodiratime -o remount #your data volume #
Then edit /etc/fstab and add “noatime, nodiratime” for you data volume.
For example:
#mount -o noatime -o nodiratime -o remount /opt
# UUID=8fa0b4a0-d845-4c6d-a507-2b38a50d5607 /opt ext4
defaults,noatime,nodiratime 12
6. Disable NUMA
#echo 0>/proc/sys/vm/zone_reclaim_mode
Install MongoDB Program
1. Add MongoDB new group and User
#su - root
# groupadd -g 20001 mongodb
# useradd -u 20001 -g mongodb mongodb
#passwd mongodb
2. Append max process and max files limitation for new user
# su - mongodb
# vi .bash_profile
ulimit -u 16384 -n 65536
3. Install mongoDB Program
#su - root
# chown mongodb:mongodb /opt
#su -mongodb
#tar xzvf mongodb-linux-x86_64-2.0.6.tgz
# mv mongodb-linux-x86_64-2.0.6 /opt/mongodb206