mongodb目錄結構：

data目錄：存在資料

etc目錄存放配置檔案：核心配置檔案mongodb.conf，keyfile檔案，叢集資訊檔案cluster.conf

log目錄：存放日誌

tmp目錄：存放臨時檔案，程序id

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├── data/
├── etc/
│  ├── cluster.conf
│  ├── keyfile
│  └── mongodb.conf
├── log/
│  └── mongodb.log
└── tmp/
      └── mongo_28000.pid

[work@xxx etc
 
]$ cat mongodb.conf 
systemLog:
  destination: file
  path: /home/work/mongodb/mongo_28042/log/mongodb.log
  logAppend: true

#net Options
net:
  maxIncomingConnections: 10240
  port: 28042
  bindIp: 10.136.42.3,localhost
  serviceExecutor : adaptive

#security Options
security:
  authorization: 'enabled'
  keyFile: 
 
/home/work/mongodb/mongo_28042/etc/glc-test
  clusterAuthMode: "keyFile"

#storage Options
storage:
  engine: "wiredTiger"
  directoryPerDB: true
  dbPath: /home/work/mongodb/mongo_28042/data
  #indexBuildRetry: true
  journal:
    enabled: true
    commitIntervalMs: 100
  wiredTiger:
    engineConfig:
      directoryForIndexes: true
      cacheSizeGB: 
 
10
      journalCompressor: "snappy"
    collectionConfig:
      blockCompressor: "snappy"
    indexConfig:
      prefixCompression: true
    #wiredTigerCollectionConfigString: lsm
    #wiredTigerIndexConfigString: lsm

#replication Options
replication:
  oplogSizeMB: 65536 #64GB
  replSetName: glc-test

#operationProfiling Options
operationProfiling:
  slowOpThresholdMs: 100
  mode: "slowOp"

processManagement:
  fork: true
  pidFilePath: /home/work/mongodb/mongo_28042/tmp/mongo_28042.pid