配置文件1

# mongod.conf
systemLog:
  destination: file
  logAppend: true
storage:
  journal:
    enabled: true
  directoryPerDB: true
  engine: wiredTiger
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
      directoryForIndexes: true
    indexConfig:
      prefixCompression: true
processManagement:
  fork: true
net:
  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

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/db
logpath=/data/mongodb/logs/mongodb.log
bind_ip=127.0.0.1
port=27017
fork=true
nohttpinterface=true
auth=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.log
storage:
  dbPath: /data/mongodb/db
  journal:
    enabled: true
  engine: wiredTiger
  wiredTiger:
    engineConfig:
      cacheSizeGB: 16
    indexConfig:
      prefixCompression: true
processManagement:
  fork: true
net:
  bindIp: 127.0.0.1
  port: 27017
security: 
  authorization: enabled