mongodb学习--Linux之mongodb的启动

1、启动mongodb出错

 WARNING: You are running this process as the root user, which is not recommended.

 解决办法：切换用户

2、切换用户之后又出现 

Unable to create/open lock file: /data/db/mongod.lock errno:13 Permission denied Is a mongod instance already running?, terminating

解决办法：删除文件 data/db/mongod.lock （需要切换到root用户才能删除，另外需要在root帐号下修改db权限
chmod 777 db）

3.WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'
 

WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always' 

解决办法：在 usr/local/mongodb目录下先创建conf文件夹，conf文件夹下创建mongodb.conf

  内容为:

#日志路径
logpath=../log/mongodb.log
#启动日志不追加,太过庞大
logappend=false
#设置mongodb的db路径
dbpath=/data/db
#后台驻留(守护)进程服务运行
fork=true

在 usr/local/mongodb目录下先创建log文件夹

再次启动mongodb  命令为 ./mongod -f ../conf/mongodb.conf

about to fork child process, waiting until server is ready for connections.

forked process: 3333

child process started successfully, parent exiting

成功

启动 mongo  

[root@localhost bin]# ./mongo

MongoDB shell version: 3.2.7

connecting to: test

Welcome to the MongoDB shell.