Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 1
Last contact: Thu Mar 14 15:16:33 CST 2024
Name: 192.168.204.51:50010 (node01)
Hostname: node01
Decommission Status : Normal
Configured Capacity: 205531639808 (191.42 GB)
DFS Used: 180224 (176 KB)
Non DFS Used: 6029176832 (5.62 GB)
DFS Remaining: 199502282752 (185.80 GB)
DFS Used%: 0.00%
DFS Remaining%: 97.07%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 1
Last contact: Thu Mar 14 15:16:34 CST 2024
Name: 192.168.204.52:50010 (node02)
Hostname: node02
Decommission Status : Normal
Configured Capacity: 205531639808 (191.42 GB)
DFS Used: 286720 (280 KB)
Non DFS Used: 6029291520 (5.62 GB)
DFS Remaining: 199502061568 (185.80 GB)
DFS Used%: 0.00%
DFS Remaining%: 97.07%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 1
Last contact: Thu Mar 14 15:16:34 CST 2024
（2）查看root@hadoop \~\]# cd /usr/local/hadoop/ \[root@hadoop hadoop\]# ./bin/hadoop fs -ls /  （3）上传第一个测试文件 \[root@hadoop \~\]# /usr/local/hadoop/bin/hadoop fs -put /root/jenkins.tar.gz /jenkins.tar.gz  观察上传变化 \[root@hadoop hadoop\]# ./bin/hadoop fs -ls /  （4）上传第二个测试文件 \[root@hadoop \~\]# /usr/local/hadoop/bin/hadoop fs -put /root/pinpoint-image.tar.gz /pinpoint.tar.gz  观察上传变化 \[root@hadoop hadoop\]# ./bin/hadoop fs -ls /  （5）web查看 http://192.168.204.50:50070/  （6）清空本地文件 \[root@hadoop \~\]# rm -rf jenkins.tar.gz pinpoint-image.tar.gz  （7）再次查看节点状态 （已使用） node01: 2.41GB node02: 2.27GB node03: 2.15GB node04: 2.26GB \[root@hadoop hadoop\]# ./bin/hdfs dfsadmin -report Configured Capacity: 822126559232 (765.67 GB) Present Capacity: 798784053248 (743.93 GB) DFS Remaining: 789019389952 (734.83 GB) DFS Used: 9764663296 (9.09 GB) DFS Used%: 1.22% Under replicated blocks: 0 Blocks with corrupt replicas: 0 Missing blocks: 0 Missing blocks (with replication factor 1): 0 *** ** * ** *** Live datanodes (4): Name: 192.168.204.54:50010 (node04) Hostname: node04 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2424492032 (2.26 GB) Non DFS Used: 5662638080 (5.27 GB) DFS Remaining: 197444509696 (183.88 GB) DFS Used%: 1.18% DFS Remaining%: 96.07% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 15:57:57 CST 2024 Name: 192.168.204.53:50010 (node03) Hostname: node03 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2312085504 (2.15 GB) Non DFS Used: 5620936704 (5.23 GB) DFS Remaining: 197598617600 (184.03 GB) DFS Used%: 1.12% DFS Remaining%: 96.14% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 15:57:58 CST 2024 Name: 192.168.204.51:50010 (node01) Hostname: node01 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2592927744 (2.41 GB) Non DFS Used: 6029148160 (5.62 GB) DFS Remaining: 196909563904 (183.39 GB) DFS Used%: 1.26% DFS Remaining%: 95.80% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 15:57:57 CST 2024 Name: 192.168.204.52:50010 (node02) Hostname: node02 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2435158016 (2.27 GB) Non DFS Used: 6029783040 (5.62 GB) DFS Remaining: 197066698752 (183.53 GB) DFS Used%: 1.18% DFS Remaining%: 95.88% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 15:57:59 CST 2024  （8）计算总存储使用量 9.09 G （jenkins 1.24 GB,pinpoint 3.27 GB ,存储副本量为2）  (9)修改配置文件（hadoop节点） #添加代码 \[root@hadoop hadoop\]# vim hdfs-site.xml  修改前：  修改后： ...... dfs.hosts.exclude /usr/local/hadoop/etc/hadoop/exclude ......  （10）配置移除主机 \[root@hadoop hadoop\]# vim /usr/local/hadoop/etc/hadoop/exclude  node04  （11）数据刷新 \[root@hadoop hadoop\]# ./bin/hdfs dfsadmin -refreshNodes  （12）查看节点状态 node04节点状态变为Decommissioned in Program \[root@hadoop hadoop\]# ./bin/hdfs dfsadmin -report Configured Capacity: 619019411456 (576.51 GB) Present Capacity: 600866701319 (559.60 GB) DFS Remaining: 590966771712 (550.38 GB) DFS Used: 9899929607 (9.22 GB) DFS Used%: 1.65% Under replicated blocks: 2 Blocks with corrupt replicas: 0 Missing blocks: 0 Missing blocks (with replication factor 1): 0 *** ** * ** *** Live datanodes (4): Name: 192.168.204.54:50010 (node04) Hostname: node04 Decommission Status : Decommission in progress Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2424492032 (2.26 GB) Non DFS Used: 5663162368 (5.27 GB) DFS Remaining: 197443985408 (183.88 GB) DFS Used%: 1.18% DFS Remaining%: 96.06% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 16:34:33 CST 2024 Name: 192.168.204.53:50010 (node03) Hostname: node03 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2312085504 (2.15 GB) Non DFS Used: 5756112896 (5.36 GB) DFS Remaining: 197463441408 (183.90 GB) DFS Used%: 1.12% DFS Remaining%: 96.07% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 2 Last contact: Thu Mar 14 16:34:31 CST 2024 Name: 192.168.204.51:50010 (node01) Hostname: node01 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2592927744 (2.41 GB) Non DFS Used: 6232051712 (5.80 GB) DFS Remaining: 196706660352 (183.20 GB) DFS Used%: 1.26% DFS Remaining%: 95.71% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 3 Last contact: Thu Mar 14 16:34:33 CST 2024 Name: 192.168.204.52:50010 (node02) Hostname: node02 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2570424327 (2.39 GB) Non DFS Used: 6164545529 (5.74 GB) DFS Remaining: 196796669952 (183.28 GB) DFS Used%: 1.25% DFS Remaining%: 95.75% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 2 Last contact: Thu Mar 14 16:34:32 CST 2024 Decommissioning datanodes (1): Name: 192.168.204.54:50010 (node04) Hostname: node04 Decommission Status : Decommission in progress Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2424492032 (2.26 GB) Non DFS Used: 5663162368 (5.27 GB) DFS Remaining: 197443985408 (183.88 GB) DFS Used%: 1.18% DFS Remaining%: 96.06% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 16:34:33 CST 2024   (13) 再次查看节点 node04节点状态变为Decommissioned \[root@hadoop hadoop\]# ./bin/hdfs dfsadmin -report Configured Capacity: 619019411456 (576.51 GB) Present Capacity: 601338761216 (560.04 GB) DFS Remaining: 589149618176 (548.69 GB) DFS Used: 12189143040 (11.35 GB) DFS Used%: 2.03% Under replicated blocks: 0 Blocks with corrupt replicas: 0 Missing blocks: 0 Missing blocks (with replication factor 1): 0 *** ** * ** *** Live datanodes (4): Name: 192.168.204.54:50010 (node04) Hostname: node04 Decommission Status : Decommissioned Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2424492032 (2.26 GB) Non DFS Used: 5662666752 (5.27 GB) DFS Remaining: 197444481024 (183.88 GB) DFS Used%: 1.18% DFS Remaining%: 96.07% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 16:42:33 CST 2024 Name: 192.168.204.53:50010 (node03) Hostname: node03 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 3123707904 (2.91 GB) Non DFS Used: 5620969472 (5.23 GB) DFS Remaining: 196786962432 (183.27 GB) DFS Used%: 1.52% DFS Remaining%: 95.75% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 16:42:31 CST 2024 Name: 192.168.204.51:50010 (node01) Hostname: node01 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2998738944 (2.79 GB) Non DFS Used: 6029717504 (5.62 GB) DFS Remaining: 196503183360 (183.01 GB) DFS Used%: 1.46% DFS Remaining%: 95.61% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 16:42:33 CST 2024 Name: 192.168.204.52:50010 (node02) Hostname: node02 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 3642204160 (3.39 GB) Non DFS Used: 6029963264 (5.62 GB) DFS Remaining: 195859472384 (182.41 GB) DFS Used%: 1.77% DFS Remaining%: 95.29% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 16:42:32 CST 2024  ## (14) 重启 \[root@hadoop hadoop\]# ssh node04 \[root@node04 \~\]# reboot  ## （15）查看节点（已使用） node01: 2.79GB node02: 3.39GB node03: 2.91GB \[root@hadoop hadoop\]# ./bin/hdfs dfsadmin -report Configured Capacity: 619019411456 (576.51 GB) Present Capacity: 601338118144 (560.04 GB) DFS Remaining: 589148975104 (548.69 GB) DFS Used: 12189143040 (11.35 GB) DFS Used%: 2.03% Under replicated blocks: 0 Blocks with corrupt replicas: 0 Missing blocks: 0 Missing blocks (with replication factor 1): 0 *** ** * ** *** Live datanodes (3): Name: 192.168.204.53:50010 (node03) Hostname: node03 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 3123707904 (2.91 GB) Non DFS Used: 5621551104 (5.24 GB) DFS Remaining: 196786380800 (183.27 GB) DFS Used%: 1.52% DFS Remaining%: 95.75% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 17:00:14 CST 2024 Name: 192.168.204.51:50010 (node01) Hostname: node01 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 2998738944 (2.79 GB) Non DFS Used: 6029742080 (5.62 GB) DFS Remaining: 196503158784 (183.01 GB) DFS Used%: 1.46% DFS Remaining%: 95.61% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 17:00:12 CST 2024 Name: 192.168.204.52:50010 (node02) Hostname: node02 Decommission Status : Normal Configured Capacity: 205531639808 (191.42 GB) DFS Used: 3642204160 (3.39 GB) Non DFS Used: 6030000128 (5.62 GB) DFS Remaining: 195859435520 (182.41 GB) DFS Used%: 1.77% DFS Remaining%: 95.29% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Thu Mar 14 17:00:12 CST 2024 Dead datanodes (1):