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Mongodb learning notes: command line tools

2022-07-04 01:04:00 【garvenc】

This article is updated on 2022-01-22, Use MongoDB 4.4.5.

bsondump
mongo
mongod
mongodump
mongofiles
mongorestore
mongos
mongostat
mongotop

bsondump

BSON View tools .

bsondump BSONFILENAME

mongo

JavaScript shell.

mongo [OPTION] [DB_NAME|HOST[:PORT][/DB_NAME]|MONGODB_URI] [JS_FILENAME[ ...]]

OPTION for ：

--nodb： start-up shell Do not connect to any mongod.
--norc： start-up shell Do not load .mongorc.js. It will load by default .
--password|-p [PASSWORD]： Specified password . If not specified PASSWORD, Prompt for password in the interactive interface .
--quiet： Do not print the prompt message after successful connection .
--username|-u USERNAME： Specify user name .

If not specified DB_NAME or HOST[:PORT][/DB_NAME or MONGODB_URI, Default connection to localhost:27017/test.

MONGODB_URI The format is ：mongodb://[USERNAME[:PASSWORD]@]HOST[:PORT][,...,HOST1[:PORT1]][/[DB_NAME]][?NAME=VALUE[&...&NAME1=VALUE1]].NAME=VALUE for ：

replicaSet=REPLSET_NAME： Replica set name . If this parameter is used , You can specify any （ You don't need all ）HOST[:PORT], The primary node connection will be automatically selected .

As specified JS_FILENAME, Then execute the script file in turn and exit （ The relative path depends on shell Running directory ）. otherwise , Use... Interactively shell.

mongod

MongoDB The server .

mongod [OPTION]
mongod --replSet REPLSET_NAME
mongod --repair [--repairpath DST_DIR] [--dbpath DIR]

OPTION for ：

-v： The level of logging . If this option is not used, it is the lowest value 0;-vvvvv Is the highest value 5（ Record almost all operations , Including the content of each request processing ）.
--auth： Enable Authentication .
--bind_ip： Monitoring IP.
--dbpath DIR： Data directory . The default is /data/db（Windows For the current drive ）.
--config|-f FILENAME： The configuration file . The options specified on the command line can override the values in the configuration file .
--configsvr： Start as a configuration server . The default port is 27019, The default data directory is /data/configdb.
--fork： Create a child process running in the background . It needs to be used at the same time --logpath.
--directoryperdb： Each database is stored in a separate directory .
--help： view help .
--journalCommitInterval MICROSECONDS： The time interval between journal system submission . The unit is millisecond , The minimum is 2, The maximum is 500.
--logappend： Write the log file by appending . It needs to be used at the same time --logpath.
--logpath FILENAME： Log output file . If not specified, output to standard output .
--noprealloc： Prohibit pre allocation of data files .
--noscripting： Prohibition of execution JavaScript Script . Be careful , some shell Auxiliary functions depend on JavaScript Script .
--nounixsocket： No monitoring UNIX Socket .
--port PORT： Listening port . The default is 27017.
--profile LEVEL： Set the system analyzer level .0 To turn off the system analyzer ,1 Slow query for record only ,2 To record all operations .
--quiet： No log output .
--repair： Repair data . Will not listen on port , But the log will be output .
--repairpath DST_DIR： Specify the destination directory for copying files when repairing .
--replSet REPLSET_NAME： Specify the replica set name , Start as replica set node . Do not use this option , Start in stand-alone mode .
--shardsvr： Start as a fragment . The default port is 27018,
--slowms MICROSECONDS： Set the slow query threshold of the system analyzer . The unit is millisecond .
--syncdelay SECONDS： The interval between flushing dirty pages to disk . The unit is in seconds .

The format of the configuration file is as follows ：

# The following content is ignored as a comment .
The syntax of the specified parameter is OPTION = VALUE.OPTION Remove --, If the command line parameter is a switch option that does not need to specify a value VALUE Set to true.

mongodump

Data backup tools . During the backup process, write operations will continue .

mongodump [OPTION]

OPTION for ：

--help： view help .
--oplog： At the same time, dump the operation logs in the backup process oplog, To get a snapshot of the backup point in time . Such as backup replica set , This option is required .
--out|-o DUMPDIR： The output directory . The default is dump. The output directory contains several directories named database , Each directory contains several .bson Data files and .metadata.json Metadata file .
--port PORT： The port of the server .
--version： View version .

Such as connecting to a replica set , Then a backup node will be automatically selected to perform the backup operation .

If connected to mongos, All partitions will be backed up .

mongofiles

GridFS Tools .

mongofiles [OPTION] COMMAND [ARG]

OPTION for ：

--db|-d DBNAME： Specify database .
--help： view help .
--local|-l LOCALFILENAME： Local filename , Used only for put and get Sons command .

COMMAND [ARG] for （FILENAME Can be a file path ）：

delete FILENAME： from GridFS Delete files in .
get FILENAME： take GridFS Download the files in to the file system .
list [PREFIX]： List GridFS Documents in . Find by prefix matching . If no prefix is specified , Then list all documents .
put FILENAME： Upload the files in the file system to GridFS.
search SUBSTRING： stay GridFS Searching for files in . Search substring .

mongorestore

Data recovery tools .

mongorestore [OPTION] [DUMPDIR|BSONFILENAME]

OPTION for ：

--collection|-c COLLECTIONNAME： Restore only the specified set .
--db|-d DBNAME： Restore only the specified database .
--dir DUMPDIR： Backup data directory to be restored . The default is dump.
--drop： Perform data replacement , Delete the collection before restoring it .
--oplogReplay： Replay operation log oplog, To get a snapshot of the backup point in time .
--port PORT： The port of the server .
--version： View version .

If connected to mongos, All partitions will be restored .

mongos

Patch routing .

mongos [OPTION]
mongos --configdb CONFIG

OPTION for ：

--configdb CONFIG： Specify the configuration server , The format is REPLSET_NAME/HSOT_PORT<,...,HSOT_PORT>.
--maxConns N： Specify the maximum number of connections .
--nosplit： Turn off the splitting of blocks .
--port PORT： Specify listening port . The default is 27017.

mongostat

Status statistics tool . Output once every other period , Count the information since the last output . Can connect to replica sets and sharding clusters .

mongostat [OPTION] [INTERVAL_SECONDS]

OPTION for ：

--discover： Find all nodes of replica set or partitioned cluster , A line of information is also output for each node .

The output contains the following fields ：

host： The host address .
insert： Number of inserts .
query： Number of queries .
update： Number of updates .
delete： The number of deletions .
getmore： The number of times to get more data when querying the cursor .
command： The number of times the command was executed .
dirty：
used：
flushes： The number of times data is refreshed to disk .
mapped： Mapped memory size . Usually approximately equal to the size of the data directory .
vsize： The size of virtual memory in use . Usually the data directory 2 times （ Once for mapping files , Once used in the diary system ）.
res： The amount of memory in use . Generally, it should be as close as possible to the memory size of the machine .
faults：
qrw： The queue size of read and write operations . That is, the number of blocked read and write operations . Read and write to “|” Separate .
arw： Number of active clients reading and writing . That is, the number of clients reading and writing . Read and write to “|” Separate .
net_in： The number of bytes transmitted through the network . It doesn't have to be equal to the statistics of the operating system .
net_out： The number of bytes transmitted through the network . It doesn't have to be equal to the statistics of the operating system .
conn： Number of open connections . Including input and output connections .
set： Replica set name .
repl： Node state of replica set .
time： Statistical time point .