mongod 是数据库启动命令，具体参数如下：
在${MongoDB_HOME}/bin目录下执行：./mongod -help
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
--transitionToAuth For rolling access control upgrade.
Attempt to authenticate over outgoing
connections and proceed regardless of
success. Accept incoming connections
with or without authentication.
--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
--networkMessageCompressors arg Comma-separated list of compressors to
use for network messages
--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
<server:port>
--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 <setname>[/<optionalseedhostlist
>]
--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
--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
简单示例：
启动数据库服务： ./mongod --fork --dbpath /home/yanlei/mongodb/dbs/db-27017 --port 27017 --pidfilepath /home/yanlei/mongodb/pids/pid-27017.pid --logpath /home/yanlei/mongodb/logs/log-27017.log --fork :后台执行 --dbpath ：指定数据文件目录 --port :指定端口 --pidfilepath:指定PID文件全路径 --logpath:指定日志文件全路径
关闭数据库服务： ./mongod --dbpath /home/yanlei/mongodb/dbs/db-27017 --shutdown --dbpath ：指定数据文件目录 --shutdown:关闭数据库