Brief Introduction to MongoDB (installation)

1. Installation preparation

[Root @ chen download] # tar zxvf mongodb-linux-x86_64-2.2.0.tgz

[Root @ chen download] # cp mongodb-linux-x86_64-2.2.0/usr/local/mongodb-r

2. Create Database folders and log files

[Root @ chen download] # mkdir/usr/local/mongodb/data

[Root @ chen download] # touch/usr/local/mongodb/logs

Set auto-start

Add the mongodb startup project to rc. local to ensure that mongodb is started when the server is started.

[Root @ chen download] # echo "/usr/local/mongodb/bin/mongod -- dbpath =/usr/local/mongodb/data-logpath =/usr/local/mongodb/ logs-logappend -- auth-port = 27017 ">/etc/rc. local

Start mongodb

Cd to the bin folder in the mongodb directory to start mongodb

// The following is the logon method that requires permissions. the user name and password are required for user connection.

[Root @ chen download] #/usr/local/mongodb/bin/mongod -- dbpath =/usr/local/mongodb/data -- logpath =/usr/local/mongodb/logs -- logappend -- auth -- port = 27017 -- fork

// No password is required.

[Root @ chen download] #/usr/local/mongodb/bin/mongod -- dbpath =/usr/local/mongodb/data -- logpath =/usr/local/mongodb/logs -- logappend -- port = 27017 -- fork

Parameter description: -- dbpath database path (data file)

-- Logpath: Log File Path

-- Master is specified as the master machine.

-- Slave is specified as the slave machine

-- Source: Specifies the IP address of the host.

-- PologSize: the size of the specified log file cannot exceed 64 MB. because resync is very large and time-consuming, it is best to set a large enough oplogSize to avoid resync (the default oplog size is 5% of the idle disk size ).

-- Add at the end of the logappend Log File

-- Port enables the port number

-- Fork runs in the background

-- Only specifies which database to copy

-- Slavedelay indicates the interval between slave replication detection.

-- Does auth need to verify the permission to log on (user name and password)

-H [-- help] show this usage information

-- Version show version information

-F [-- config] arg configuration file specifying additional options

-- Port arg specify port number

-- Bind_ip arg local ip address to bind listener-all local ips

Bound by default

-V [-- verbose] be more verbose (include multiple times for more

Verbosity e.g.-vvvvv)

-- Dbpath arg (=/data/db/) directory for datafiles specifies the data storage directory

-- Quiet quieter output silent mode

-- Logpath arg file to send all output to instead of stdout specifies the log storage directory

-- Logappend appnd to logpath instead of over-writing specifies whether to append or overwrite a log file.

-- Fork server process is run by creating a sub-process

-- Cpu periodically show cpu and iowait utilization periodically displays cpu and io usage

-- Noauth run without security run in No Authentication Mode

-- Auth run with security Authentication Mode

-- Objcheck inspect client data for validity on receipt check the validity of client input data

-- Quota enable db quota management

-- QuotaFiles arg number of files allower per db, requires -- quota specifies the number of files allowed by each database

-- Initialize rvpath arg root directory for the babble app server

-- Nocursors diagnostic/debugging option debug diagnostic options

-- Nohints ignore query hints ignore query hit rate

-- Nohttpinterface disable http interface: disable the http interface. The default value is 28017.

-- Noscripting disable scripting engine shut down the Script engine

-- Noprealloc disable data file preallocation disable database file size pre-allocation

-- Smallfiles use a smaller default file size

-- Nssize arg (= 16). ns file size (in MB) for new databases default size of the ns file in the new database

-- Diaglog arg 0 = off 1 = W 2 = R 3 = both 7 = W + some reads: Read-only, write-only, or read/write, or the primary write + part Read mode

-- Sysinfo print some diagnostic system information print system diagnostic information

-- Upgrade db if needed update the database if necessary

-- Repair run repair on all dbs fix all databases

-- Notablescan do not allow table scans does not run table Scan

-- Syncdelay arg (= 60) seconds between disk syncs (0 for never) the time when the system refreshes the disk synchronously. The default value is 60 s.

Replication options:

-- Master mode master replication mode

-- Slave mode slave replication mode

-- Source arg when slave: specify master as <server: port> when it is a slave, specify the master Address and port

-- Only arg when slave: specify a single database to replicate when it is set to slave, specify a single database to be copied from the master

-- Pairwith arg address of server to pair

-- Arbiter arg address of arbiter server arbitration server, used in master and pair

-- Autoresync automatically resync if slave data is stale automatically synchronize slave data

-- OplogSize arg size limit (in MB) for op log specifies the size of the operation log

-- OpIdMem arg size limit (in bytes) for in memory storage of op ids specifies the memory size for storing operation logs.

Sharding options:

-- Configsvr declare this is a config db of a cluster specifies the configuration server in the shard.

-- Shardsvr declare this is a shard db of a cluster specified shard Server

Go to the CLI management interface of the database

Cd to the bin folder in the mongodb directory and execute the command./mongo

Run the following command:

If the database cannot be connected, it is a problem with the mongod. lock file under the data Directory. You can use the following repair command,

Mongod -- repair