mongoBD学习（二）客户端的连接

monGo客户端由bin/mongo启动

0、帮助

root@adela-vm:/opt/mongoDB_simple# ./bin/mongo --help
MongoDB shell version: 2.6.9
usage: ./bin/mongo [options] [db address] [file names (ending in .js)]

1、启动mongoDB 客户端进程

root@adela-vm:/opt/mongodb_simple# ./bin/mongo 127.0.0.1:12345/test
MongoDB shell version: 2.6.9
connecting to: 127.0.0.1:12345/test
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
        Http://docs.mongodb.org/
Questions? Try the support group
        http://groups.google.com/group/mongodb-user
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2、关闭mongoDB 客户端进程
方法1：
>db.shutdownServer()
> db.shutdownServer()
shutdown command only works with the admin database; try 'use admin'
必须要admin才能使用shutdown命令

> use admin
switched to db admin
> db.shutdownServer()
2015-03-27T11:33:49.502+0800 DBClientCursor::init call() failed
server should be down...
2015-03-27T11:33:49.506+0800 trying reconnect to 127.0.0.1:12345 (127.0.0.1) failed
2015-03-27T11:33:49.506+0800 warning: Failed to connect to 127.0.0.1:12345, reason: errno:111 Connection refused
2015-03-27T11:33:49.506+0800 reconnect 127.0.0.1:12345 (127.0.0.1) failed failed couldn't connect to server 127.0.0.1:12345 (127.0.0.1), connection attempt failed
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方法2：kill -15 进程号或者kill （不加参数）进程号
除非在特殊情况下，避免使用kill -9 进程号

3、重新启动mongo
nuMactl --interleave=all bin/mongod -f conf/mongod.conf
The program 'numactl' is currently not installed. You can install it by typing:
apt-get install numactl

安装numactl
apt-get install numactl
root@adela-vm:/opt/mongodb_simple/log# apt-get install numactl
Reading package lists... Done
Building dependency tree
Reading state infORMation... Done
The following NEW packages will be installed:
  numactl
0 upgraded, 1 newly installed, 0 to remove and 348 not upgraded.
Need to get 30.1 kB of arcHives.
After this operation, 135 kB of additional disk space will be used.
Get:1 http://cn.archive.ubuntu.com/ubuntu/ trusty-updates/universe numactl amd64 2.0.9~rc5-1ubuntu3 [30.1 kB]
Fetched 30.1 kB in 0s (62.3 kB/s)
Selecting previously unselected package numactl.
(Reading database ... 170689 files and directories currently installed.)
Preparing to unpack .../numactl_2.0.9~rc5-1ubuntu3_amd64.deb ...
Unpacking numactl (2.0.9~rc5-1ubuntu3) ...
Processing triggers for man-db (2.6.7.1-1) ...
Setting up numactl (2.0.9~rc5-1ubuntu3) ...

重启服务端
root@adela-vm:/opt/mongodb_simple# numactl --interleave=all bin/mongod -f conf/mongod.conf
about to fork child process, waiting until server is ready for connections.
forked process: 4223
child process started successfully, parent exiting

4、查看日志
tail mongod.log
2015-03-27T11:42:38.343+0800 [initandlisten] waiting for connections on port 12345

5、启动客户端

root@adela-vm:/opt/mongodb_simple# ./bin/mongo 127.0.0.1:12345/test
MongoDB shell version: 2.6.9
connecting to: 127.0.0.1:12345/test
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