./mongod --help

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Options:

General options:

 -h [ --help ]             show this usage information

 --version               show version information

 -f [ --config ] arg          configuration file specifying

                    additional options

 -v [ --verbose ] [=arg(=v)]      be more verbose (include multiple times

                    for more verbosity e.g. -vvvvv)

 --quiet                quieter output

 --port arg               specify port number - 27017 by default

 --bind_ip arg             comma separated list of ip addresses to

                    listen on - all local ips by default

 --ipv6                 enable IPv6 support (disabled by

                    default)

 --maxConns arg             max number of simultaneous connections

                    - 1000000 by default

 --logpath arg             log file to send write to instead of

                    stdout - has to be a file, not

                    directory

 --syslog                log to system's syslog facility instead

                    of file or stdout

 --syslogFacility arg          syslog facility used for mongodb syslog

                    message

 --logappend              append to logpath instead of

                    over-writing

 --logRotate arg            set the log rotation behavior

                    (rename|reopen)

 --timeStampFormat arg         Desired format for timestamps in log

                    messages. One of ctime, iso8601-utc or

                    iso8601-local

 --pidfilepath arg           full path to pidfile (if not set, no

                    pidfile is created)

 --keyFile arg             private key for cluster authentication

 --noauth                run without security

 --setParameter arg           Set a configurable parameter

 --httpinterface            enable http interface

 --clusterAuthMode arg         Authentication mode used for cluster

                    authentication. Alternatives are

                    (keyFile|sendKeyFile|sendX509|x509)

 --nounixsocket             disable listening on unix sockets

 --unixSocketPrefix arg         alternative directory for UNIX domain

                    sockets (defaults to /tmp)

 --filePermissions arg         permissions to set on UNIX domain

                    socket file - 0700 by default

 --fork                 fork server process

 --auth                 run with security

 --jsonp                allow JSONP access via http (has

                    security implications)

 --rest                 turn on simple rest api

 --slowms arg (=100)          value of slow for profile and console

                    log

 --profile arg             0=off 1=slow, 2=all

 --cpu                 periodically show cpu and iowait

                    utilization

 --sysinfo               print some diagnostic system

                    information

 --noIndexBuildRetry          don't retry any index builds that were

                    interrupted by shutdown

 --noscripting             disable scripting engine

 --notablescan             do not allow table scans

 --shutdown               kill a running server (for init

                    scripts)

Replication options:

 --oplogSize arg            size to use (in MB) for replication op

                    log. default is 5% of disk space (i.e.

                    large is good)

Master/slave options (old; use replica sets instead):

 --master                master mode

 --slave                slave mode

 --source arg              when slave: specify master as

                    

 --only arg               when slave: specify a single database

                    to replicate

 --slavedelay arg            specify delay (in seconds) to be used

                    when applying master ops to slave

 --autoresync              automatically resync if slave data is

                    stale

Replica set options:

 --replSet arg             arg is [/

                    >]

 --replIndexPrefetch arg        specify index prefetching behavior (if

                    secondary) [none|_id_only|all]

 --enableMajorityReadConcern      enables majority readConcern

Sharding options:

 --configsvr              declare this is a config db of a

                    cluster; default port 27019; default

                    dir /data/configdb

 --configsvrMode arg          Controls what config server protocol is

                    in use. When set to "sccc" keeps server

                    in legacy SyncClusterConnection mode

                    even when the service is running as a

                    replSet

 --shardsvr               declare this is a shard db of a

                    cluster; default port 27018

SSL options:

 --sslOnNormalPorts           use ssl on configured ports

 --sslMode arg             set the SSL operation mode

                    (disabled|allowSSL|preferSSL|requireSSL

                    )

 --sslPEMKeyFile arg          PEM file for ssl

 --sslPEMKeyPassword arg        PEM file password

 --sslClusterFile arg          Key file for internal SSL

                    authentication

 --sslClusterPassword arg        Internal authentication key file

                    password

 --sslCAFile arg            Certificate Authority file for SSL

 --sslCRLFile arg            Certificate Revocation List file for

                    SSL

 --sslDisabledProtocols arg       Comma separated list of TLS protocols

                    to disable [TLS1_0,TLS1_1,TLS1_2]

 --sslWeakCertificateValidation     allow client to connect without

                    presenting a certificate

 --sslAllowConnectionsWithoutCertificates

                    allow client to connect without

                    presenting a certificate

 --sslAllowInvalidHostnames       Allow server certificates to provide

                    non-matching hostnames

 --sslAllowInvalidCertificates     allow connections to servers with

                    invalid certificates

 --sslFIPSMode             activate FIPS 140-2 mode at startup

Storage options:

 --storageEngine arg          what storage engine to use - defaults

                    to wiredTiger if no data files present

 --dbpath arg              directory for datafiles - defaults to

                    /data/db

 --directoryperdb            each database will be stored in a

                    separate directory

 --noprealloc              disable data file preallocation - will

                    often hurt performance

 --nssize arg (=16)           .ns file size (in MB) for new databases

 --quota                limits each database to a certain

                    number of files (8 default)

 --quotaFiles arg            number of files allowed per db, implies

                    --quota

 --smallfiles              use a smaller default file size

 --syncdelay arg (=60)         seconds between disk syncs (0=never,

                    but not recommended)

 --upgrade               upgrade db if needed

 --repair                run repair on all dbs

 --repairpath arg            root directory for repair files -

                    defaults to dbpath

 --journal               enable journaling

 --nojournal              disable journaling (journaling is on by

                    default for 64 bit)

 --journalOptions arg          journal diagnostic options

 --journalCommitInterval arg      how often to group/batch commit (ms)

WiredTiger options:

 --wiredTigerCacheSizeGB arg      maximum amount of memory to allocate

                    for cache; defaults to 1/2 of physical

                    RAM

 --wiredTigerStatisticsLogDelaySecs arg (=0)

                    seconds to wait between each write to a

                    statistics file in the dbpath; 0 means

                    do not log statistics

 --wiredTigerJournalCompressor arg (=snappy)

                    use a compressor for log records

                    [none|snappy|zlib]

 --wiredTigerDirectoryForIndexes    Put indexes and data in different

                    directories

 --wiredTigerCollectionBlockCompressor arg (=snappy)

                    block compression algorithm for

                    collection data [none|snappy|zlib]

 --wiredTigerIndexPrefixCompression arg (=1)

                    use prefix compression on row-store

                    leaf pages

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