配置文件1

# mongod.confsystemLog:  destination: file  logAppend: truestorage:  journal:    enabled: true  directoryPerDB: true  engine: wiredTiger  wiredTiger:    engineConfig:      cacheSizeGB: 2      directoryForIndexes: true    indexConfig:      prefixCompression: trueprocessManagement:  fork: truenet:  port: 27017

目录介绍

/data/wyd/mongodb下的目录内容如下backup(备份) log(日志) pid(pid文件) script shard-a-primary(数据库目录)

cacheSize是指系统分配给mongod用的内存，比如你系统有三十G内存，你可以分配二十四G内存给Mongodb

配置文件详细说明参考

Mongodb内存缓存大小配置

启动

numactl --interleave=all mongod -f /etc/mongod.conf \--dbpath /data/wyd03/mongodbard-a-primary \--logpath /data/wyd03/mongodb/logard-a-primary.log \--pidfilepath /data/wyd03/mongodb/pidard-a-primary.pid --port 27021

指定不一样的pid和端口这样就可以起启多个不一样的进程

线上配置文件二

dbpath=/data/mongodb/dblogpath=/data/mongodb/logs/mongodb.logbind_ip=127.0.0.1port=27017fork=truenohttpinterface=trueauth=true

启动

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/conf/mongodb.conf

线上配置文件三

systemLog:  quiet: false  logAppend: true  destination: file  path: /data/mongodb/logs/mongod.logstorage:  dbPath: /data/mongodb/db  journal:    enabled: true  engine: wiredTiger  wiredTiger:    engineConfig:      cacheSizeGB: 16    indexConfig:      prefixCompression: trueprocessManagement:  fork: truenet:  bindIp: 127.0.0.1  port: 27017security:   authorization: enabled