官方安装手册
http://docs.mongodb.org/manual/tutorial/install-mongodb-on-red-hat/
安装完成后,登录出现如下告警:
1.登录mongo shell
[root@localhost ~]# mongo
缺少openssl、libssh3
yum -y install openssl
service mongod restart
2.I use mongodb 3.0 and find a warning:
[root@localhost ~]# mongo
MongoDB shell version: 3.0.1
connecting to: test
Server has startup warnings:
2015-03-13T16:28:29.405+0800 I CONTROL [initandlisten]
2015-03-13T16:28:29.406+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2015-03-13T16:28:29.406+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2015-03-13T16:28:29.406+0800 I CONTROL [initandlisten]
2015-03-13T16:28:29.407+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2015-03-13T16:28:29.407+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2015-03-13T16:28:29.407+0800 I CONTROL [initandlisten]
solved:
vi /etc/init.d/mongod
#行首添加
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
重启mongod
service mongod restart
3.Recommended ulimit Settings
Every deployment may have unique requirements and settings; however, the following thresholds and settings are particularly important for mongod and mongos deployments:
-f (file size): unlimited
-t (cpu time): unlimited
-v (virtual memory): unlimited [1]
-n (open files): 64000
-m (memory size): unlimited [1] [2]
-u (processes/threads): 64000
Always remember to restart your mongod and mongos instances after changing the ulimit settings to ensure that the changes take effect.
vi /etc/profile
在最后添加
ulimit -n 64000
ulimit -u 64000
source /etc/profile
2015-04-02T01:36:21.150-0700 I CONTROL [initandlisten]
2015-04-02T01:36:21.150-0700 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.