# 根据规划在mini05、mini06、mini07 启动
# 在第一次格式化的时候需要先启动journalnode 之后就不必了
[yun@mini05 ~]$ hadoop-daemon.sh start journalnode # 已经配置环境变量，所以不用进入到响应的目录
starting journalnode, logging to /app/hadoop-2.7.6/logs/hadoop-yun-journalnode-mini05.out
[yun@mini05 ~]$ jps
1281 QuorumPeerMain
1817 Jps
1759 JournalNode
8.3. 格式化HDFS
# 在mini01上执行命令
[yun@mini01 ~]$ hdfs namenode -format
18/06/30 18:29:12 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = mini01/10.0.0.111
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 2.7.6
STARTUP_MSG: classpath = ………………
STARTUP_MSG: build = Unknown -r Unknown; compiled by 'root' on 2018-06-08T08:30Z
STARTUP_MSG: java = 1.8.0_112
************************************************************/
18/06/30 18:29:12 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT]
18/06/30 18:29:12 INFO namenode.NameNode: createNameNode [-format]
Formatting using clusterid: CID-2385f26e-72e6-4935-aa09-47848b5ba4be
18/06/30 18:29:13 INFO namenode.FSNamesystem: No KeyProvider found.
18/06/30 18:29:13 INFO namenode.FSNamesystem: fsLock is fair: true
18/06/30 18:29:13 INFO namenode.FSNamesystem: Detailed lock hold time metrics enabled: false
18/06/30 18:29:13 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000
18/06/30 18:29:13 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true
18/06/30 18:29:13 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000
18/06/30 18:29:13 INFO blockmanagement.BlockManager: The block deletion will start around 2018 Jun 30 18:29:13
18/06/30 18:29:13 INFO util.GSet: Computing capacity for map BlocksMap
18/06/30 18:29:13 INFO util.GSet: VM type = 64-bit
18/06/30 18:29:13 INFO util.GSet: 2.0% max memory 966.7 MB = 19.3 MB
18/06/30 18:29:13 INFO util.GSet: capacity = 2^21 = 2097152 entries
18/06/30 18:29:13 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false
18/06/30 18:29:13 INFO blockmanagement.BlockManager: defaultReplication = 3
18/06/30 18:29:13 INFO blockmanagement.BlockManager: maxReplication = 512
18/06/30 18:29:13 INFO blockmanagement.BlockManager: minReplication = 1
18/06/30 18:29:13 INFO blockmanagement.BlockManager: maxReplicationStreams = 2
18/06/30 18:29:13 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000
18/06/30 18:29:13 INFO blockmanagement.BlockManager: encryptDataTransfer = false
18/06/30 18:29:13 INFO blockmanagement.BlockManager: maxNumBlocksToLog = 1000
18/06/30 18:29:13 INFO namenode.FSNamesystem: fsOwner = yun (auth:SIMPLE)
18/06/30 18:29:13 INFO namenode.FSNamesystem: supergroup = supergroup
18/06/30 18:29:13 INFO namenode.FSNamesystem: isPermissionEnabled = true
18/06/30 18:29:13 INFO namenode.FSNamesystem: Determined nameservice ID: bi
18/06/30 18:29:13 INFO namenode.FSNamesystem: HA Enabled: true
18/06/30 18:29:13 INFO namenode.FSNamesystem: Append Enabled: true
18/06/30 18:29:13 INFO util.GSet: Computing capacity for map INodeMap
18/06/30 18:29:13 INFO util.GSet: VM type = 64-bit
18/06/30 18:29:13 INFO util.GSet: 1.0% max memory 966.7 MB = 9.7 MB
18/06/30 18:29:13 INFO util.GSet: capacity = 2^20 = 1048576 entries
18/06/30 18:29:13 INFO namenode.FSDirectory: ACLs enabled? false
18/06/30 18:29:13 INFO namenode.FSDirectory: XAttrs enabled? true
18/06/30 18:29:13 INFO namenode.FSDirectory: Maximum size of an xattr: 16384
18/06/30 18:29:13 INFO namenode.NameNode: Caching file names occuring more than 10 times
18/06/30 18:29:13 INFO util.GSet: Computing capacity for map cachedBlocks
18/06/30 18:29:13 INFO util.GSet: VM type = 64-bit
18/06/30 18:29:13 INFO util.GSet: 0.25% max memory 966.7 MB = 2.4 MB
18/06/30 18:29:13 INFO util.GSet: capacity = 2^18 = 262144 entries
18/06/30 18:29:13 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033
18/06/30 18:29:13 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0
18/06/30 18:29:13 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension = 30000
18/06/30 18:29:13 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.window.num.buckets = 10
18/06/30 18:29:13 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.num.users = 10
18/06/30 18:29:13 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.windows.minutes = 1,5,25
18/06/30 18:29:13 INFO namenode.FSNamesystem: Retry cache on namenode is enabled
18/06/30 18:29:13 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis
18/06/30 18:29:13 INFO util.GSet: Computing capacity for map NameNodeRetryCache
18/06/30 18:29:13 INFO util.GSet: VM type = 64-bit
18/06/30 18:29:13 INFO util.GSet: 0.029999999329447746% max memory 966.7 MB = 297.0 KB
18/06/30 18:29:13 INFO util.GSet: capacity = 2^15 = 32768 entries
18/06/30 18:29:14 INFO namenode.FSImage: Allocated new BlockPoolId: BP-1178102935-10.0.0.111-1530354554626
18/06/30 18:29:14 INFO common.Storage: Storage directory /app/hadoop/tmp/dfs/name has been successfully formatted.
18/06/30 18:29:14 INFO namenode.FSImageFormatProtobuf: Saving image file /app/hadoop/tmp/dfs/name/current/fsimage.ckpt_0000000000000000000 using no compression
18/06/30 18:29:14 INFO namenode.FSImageFormatProtobuf: Image file /app/hadoop/tmp/dfs/name/current/fsimage.ckpt_0000000000000000000 of size 320 bytes saved in 0 seconds.
18/06/30 18:29:15 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0
18/06/30 18:29:15 INFO util.ExitUtil: Exiting with status 0
18/06/30 18:29:15 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at mini01/10.0.0.111
************************************************************/
拷贝到mini02