Hadoop 节点扩容

scadm 2021年7月4日12:12:31
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配置好hosts解析

[root@node1 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
10.168.1.121 node1
10.168.1.122 node2
10.168.1.123 node3
10.168.1.124 node4

ntp时间同步

ntpdate  pool.ntp.org

关闭防火墙,selinux

[root@node4 ~]# sed -i '/SELINUX/s/enforcing/disabled/g'  /etc/selinux/config
[root@node4 ~]# setenforce  0
[root@node4 ~]# systemctl   stop     firewalld.service
[root@node4 ~]# systemctl   disable   firewalld.service

配置免秘钥

Node1节点作为Master控制节点,执行如下指令创建公钥和私钥,然后将公钥拷贝至其余节点即可。

[root@node1 ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub root@node4

配置节点JAVA环境

[root@node4 ~]# tar  -xvzf  jdk1.8.0_131.tar.gz
[root@node4 ~]# mkdir -p /usr/java/
[root@node4 ~]# \mv jdk1.8.0_131 /usr/java/
[root@node4 ~]# cat>>/etc/profile<<EOF
> export JAVA_HOME=/usr/java/jdk1.8.0_131/
> export HADOOP_HOME=/data/hadoop/
> export JAVA_LIBRARY_PATH=/data/hadoop/lib/native/
> export PATH=\$PATH:\$HADOOP_HOME/bin/:\$JAVA_HOME/bin
> EOF
[root@node4 ~]# source /etc/profile
[root@node4 ~]# java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

hadoop部署

将Node1部署完成的hadoop所有文件、目录同步至node2和node3节点

[root@node1 sbin]# for i in node4;do ssh -l root $i -a "mkdir -p /data/hadoop/" ;done
[root@node1 sbin]# for i in node4;do rsync -aP --delete /data/hadoop/ root@$i:/data/hadoop/ ;done
[root@node1 sbin]# for i in node4;do ssh -l root $i -a "rm -rf /data/hadoop/data* ";done

添加hadoop新节点

动态添加DataNode和NodeManager节点,查看现有HDFS各节点状态

[root@node1 sbin]# hdfs dfsadmin -report
Configured Capacity: 86230695936 (80.31 GB)
Present Capacity: 62350409728 (58.07 GB)
DFS Remaining: 61576511488 (57.35 GB)
DFS Used: 773898240 (738.05 MB)
DFS Used%: 1.24%
Replicated Blocks:
	Under replicated blocks: 0
	Blocks with corrupt replicas: 0
	Missing blocks: 0
	Missing blocks (with replication factor 1): 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0
Erasure Coded Block Groups: 
	Low redundancy block groups: 0
	Block groups with corrupt internal blocks: 0
	Missing block groups: 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0

-------------------------------------------------
Live datanodes (3):

Name: 10.168.1.121:9866 (node1)
Hostname: node1
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 251666432 (240.01 MB)
Non DFS Used: 8694652928 (8.10 GB)
DFS Remaining: 19797245952 (18.44 GB)
DFS Used%: 0.88%
DFS Remaining%: 68.88%
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: Sun Jul 04 12:32:11 CST 2021
Last Block Report: Sun Jul 04 11:11:59 CST 2021
Num of Blocks: 4


Name: 10.168.1.122:9866 (node2)
Hostname: node2
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 267587584 (255.19 MB)
Non DFS Used: 7599312896 (7.08 GB)
DFS Remaining: 20876664832 (19.44 GB)
DFS Used%: 0.93%
DFS Remaining%: 72.63%
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: Sun Jul 04 12:32:10 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3


Name: 10.168.1.123:9866 (node3)
Hostname: node3
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 254644224 (242.85 MB)
Non DFS Used: 7586320384 (7.07 GB)
DFS Remaining: 20902600704 (19.47 GB)
DFS Used%: 0.89%
DFS Remaining%: 72.72%
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: Sun Jul 04 12:32:10 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3

添加DataNode和NodeManager节点,在所有服务器的Hadoop workers文件中添加node4节点

[root@node1 sbin]# echo node4 >>/data/hadoop/etc/hadoop/workers ;cat /data/hadoop/etc/hadoop/workers
node1
node2
node3
node4

新加节点启动

在Node4新增节点服务器上启动:DataNode和NodeManager服务

[root@node4 ~]# hdfs --daemon start datanode
[root@node4 ~]# yarn --daemon start nodemanager
[root@node4 ~]# jps
11040 Jps
10966 NodeManager
10858 DataNode

刷新Hadoop集群节点信息

[root@node1 sbin]# hdfs dfsadmin -refreshNodes
Refresh nodes successful
[root@node1 sbin]# /data/hadoop/sbin/start-balancer.sh
再次查看集群的状态,查看HDFS各节点状态

添加DataNode节点后,输出的结果中存在Node4服务器上的DataNode节点。说明添加DataNode节点成功

[root@node1 sbin]# hdfs dfsadmin -report
Configured Capacity: 114974261248 (107.08 GB)
Present Capacity: 79917965312 (74.43 GB)
DFS Remaining: 79144058880 (73.71 GB)
DFS Used: 773906432 (738.05 MB)
DFS Used%: 0.97%
Replicated Blocks:
	Under replicated blocks: 0
	Blocks with corrupt replicas: 0
	Missing blocks: 0
	Missing blocks (with replication factor 1): 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0
Erasure Coded Block Groups: 
	Low redundancy block groups: 0
	Block groups with corrupt internal blocks: 0
	Missing block groups: 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0

-------------------------------------------------
Live datanodes (4):

Name: 10.168.1.121:9866 (node1)
Hostname: node1
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 251666432 (240.01 MB)
Non DFS Used: 8694775808 (8.10 GB)
DFS Remaining: 19797123072 (18.44 GB)
DFS Used%: 0.88%
DFS Remaining%: 68.87%
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: Sun Jul 04 12:40:50 CST 2021
Last Block Report: Sun Jul 04 11:11:59 CST 2021
Num of Blocks: 4


Name: 10.168.1.122:9866 (node2)
Hostname: node2
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 267587584 (255.19 MB)
Non DFS Used: 7599312896 (7.08 GB)
DFS Remaining: 20876664832 (19.44 GB)
DFS Used%: 0.93%
DFS Remaining%: 72.63%
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: Sun Jul 04 12:40:49 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3


Name: 10.168.1.123:9866 (node3)
Hostname: node3
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 254644224 (242.85 MB)
Non DFS Used: 7586320384 (7.07 GB)
DFS Remaining: 20902600704 (19.47 GB)
DFS Used%: 0.89%
DFS Remaining%: 72.72%
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: Sun Jul 04 12:40:49 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3


Name: 10.168.1.124:9866 (node4)
Hostname: node4
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 8192 (8 KB)
Non DFS Used: 11175886848 (10.41 GB)
DFS Remaining: 17567670272 (16.36 GB)
DFS Used%: 0.00%
DFS Remaining%: 61.12%
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: Sun Jul 04 12:40:50 CST 2021
Last Block Report: Sun Jul 04 12:38:11 CST 2021
Num of Blocks: 0

Hadoop 节点扩容

查看/data/hadoop/data_1/current/BP-1809307895-10.168.1.121-1625309798057/current/finalized/subdir0/subdir0 文件夹,看看数据有没有均衡过来。

[root@node4 subdir0]# ll /data/hadoop/data_1/current/BP-1809307895-10.168.1.121-1625309798057/current/finalized/subdir0/subdir0
总用量 0
[root@node4 subdir0]# ls
[root@node4 subdir0]# ll /data/hadoop/data_1/current/BP-1809307895-10.168.1.121-1625309798057/current/finalized/subdir0/subdir0
总用量 195240
-rw-r--r--. 1 root root 134217728 7月   4 13:01 blk_1073741825
-rw-r--r--. 1 root root   1048583 7月   4 13:01 blk_1073741825_1001.meta
-rw-r--r--. 1 root root  64151137 7月   4 13:01 blk_1073741826
-rw-r--r--. 1 root root    501191 7月   4 13:01 blk_1073741826_1002.meta

如果发现新加的节点上没有数据,可以查看配置文件/data/hadoop/etc/hadoop/hdfs-site.xml

并做以下修改,修改副本数为3

<property>
<name>dfs.replication</name>  --副本数
<value>3</value>
</property>

删除Hadoop节点

在现有Hadoop 4台集群的基础上动态删除Node2服务器上的DataNode与NodeManager节点

删除Node2上DataNode与NodeManager节点,停止DataNode和NodeManager进程

[root@node2 ~]# hdfs --daemon stop datanode
[root@node2 ~]# yarn --daemon stop nodemanager
[root@node2 ~]# jps
9780 Jps

删除每台服务器上Hadoop的workers文件中的Node2(集群内每台都要操作哦)

[root@node1 sbin]# sed -i '/^node2$/d' /data/hadoop/etc/hadoop/workers ;cat /data/hadoop/etc/hadoop/workers
node1
node3
node4

在node1服务器上执行如下命令,刷新Hadoop集群节点

[root@node1 sbin]# hdfs dfsadmin -refreshNodes
Refresh nodes successful
[root@node1 sbin]# /data/hadoop/sbin/start-balancer.sh

查看HDFS各节点状态

[root@node1 sbin]# hdfs dfsadmin -report
Configured Capacity: 114974261248 (107.08 GB)
Present Capacity: 79917268994 (74.43 GB)
DFS Remaining: 79143354368 (73.71 GB)
DFS Used: 773914626 (738.06 MB)
DFS Used%: 0.97%
Replicated Blocks:
	Under replicated blocks: 0
	Blocks with corrupt replicas: 0
	Missing blocks: 0
	Missing blocks (with replication factor 1): 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0
Erasure Coded Block Groups: 
	Low redundancy block groups: 0
	Block groups with corrupt internal blocks: 0
	Missing block groups: 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0

-------------------------------------------------
Live datanodes (4):

Name: 10.168.1.121:9866 (node1)
Hostname: node1
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 251666418 (240.01 MB)
Non DFS Used: 8694964238 (8.10 GB)
DFS Remaining: 19796934656 (18.44 GB)
DFS Used%: 0.88%
DFS Remaining%: 68.87%
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: Sun Jul 04 12:57:23 CST 2021
Last Block Report: Sun Jul 04 11:11:59 CST 2021
Num of Blocks: 4


Name: 10.168.1.122:9866 (node2)
Hostname: node2
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 267587584 (255.19 MB)
Non DFS Used: 7599312896 (7.08 GB)
DFS Remaining: 20876664832 (19.44 GB)
DFS Used%: 0.93%
DFS Remaining%: 72.63%
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: Sun Jul 04 12:47:22 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3


Name: 10.168.1.123:9866 (node3)
Hostname: node3
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 254644224 (242.85 MB)
Non DFS Used: 7586443264 (7.07 GB)
DFS Remaining: 20902477824 (19.47 GB)
DFS Used%: 0.89%
DFS Remaining%: 72.72%
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: Sun Jul 04 12:57:22 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3


Name: 10.168.1.124:9866 (node4)
Hostname: node4
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 16400 (16.02 KB)
Non DFS Used: 11176271856 (10.41 GB)
DFS Remaining: 17567277056 (16.36 GB)
DFS Used%: 0.00%
DFS Remaining%: 61.12%
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: Sun Jul 04 12:57:23 CST 2021
Last Block Report: Sun Jul 04 12:38:11 CST 2021
Num of Blocks: 0

由于我刚刚查了下状态还是正常的,我改了下我的/data/hadoop/etc/hadoop/hdfs-site.xml,配置文件,内容如下:

heartbeat.recheck.interval   5000

dfs.heartbeat.interval  3

如果heartbeat.recheck.interval设置为5000(毫秒),dfs.heartbeat.interval设置为3(秒,默认),则总的超时时间为40秒。
[root@node1 sbin]# cat /data/hadoop/etc/hadoop/hdfs-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>dfs.name.dir</name>
<value>/data/hadoop/data_name1,/data/hadoop/data_name2</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/data/hadoop/data_1,/data/hadoop/data_2</value>
</property>
<property>
<name>dfs.block.size</name>
<value>67108864</value>    --修改大小
<description>Block size</description>
</property>
<property>
<name>heartbeat.recheck.interval</name>   --修改超时时间
<value>5000</value>
</property>
<property>
<name>dfs.heartbeat.interval</name>  --修改副本数
<value>3</value>
</property>

<property>
<name>dfs.replication</name>
<value>3</value>
</property>
</configuration>

再次查看

Live datanodes (3):

Dead datanodes (1):

[root@node1 sbin]# hdfs dfsadmin -report
Configured Capacity: 86230695936 (80.31 GB)
Present Capacity: 58505794614 (54.49 GB)
DFS Remaining: 57731915776 (53.77 GB)
DFS Used: 773878838 (738.03 MB)
DFS Used%: 1.32%
Replicated Blocks:
	Under replicated blocks: 0
	Blocks with corrupt replicas: 0
	Missing blocks: 0
	Missing blocks (with replication factor 1): 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0
Erasure Coded Block Groups: 
	Low redundancy block groups: 0
	Block groups with corrupt internal blocks: 0
	Missing block groups: 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0

-------------------------------------------------
Live datanodes (3):

Name: 10.168.1.121:9866 (node1)
Hostname: node1
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 251666432 (240.01 MB)
Non DFS Used: 8694841344 (8.10 GB)
DFS Remaining: 19797057536 (18.44 GB)
DFS Used%: 0.88%
DFS Remaining%: 68.87%
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: Sun Jul 04 13:03:02 CST 2021
Last Block Report: Sun Jul 04 11:11:59 CST 2021
Num of Blocks: 4


Name: 10.168.1.123:9866 (node3)
Hostname: node3
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 254644224 (242.85 MB)
Non DFS Used: 7586525184 (7.07 GB)
DFS Remaining: 20902395904 (19.47 GB)
DFS Used%: 0.89%
DFS Remaining%: 72.72%
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: Sun Jul 04 13:03:04 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 3


Name: 10.168.1.124:9866 (node4)
Hostname: node4
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 267568182 (255.17 MB)
Non DFS Used: 11443534794 (10.66 GB)
DFS Remaining: 17032462336 (15.86 GB)
DFS Used%: 0.93%
DFS Remaining%: 59.26%
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: Sun Jul 04 13:03:02 CST 2021
Last Block Report: Sun Jul 04 12:38:11 CST 2021
Num of Blocks: 3


Dead datanodes (1):

Name: 10.168.1.122:9866 (node2)
Hostname: node2
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 267587584 (255.19 MB)
Non DFS Used: 7599312896 (7.08 GB)
DFS Remaining: 20876664832 (19.44 GB)
DFS Used%: 0.93%
DFS Remaining%: 72.63%
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: 0
Last contact: Sun Jul 04 12:47:22 CST 2021
Last Block Report: Sun Jul 04 11:11:58 CST 2021
Num of Blocks: 0

Hadoop 节点扩容

 

动态删除DataNode节点与NodeManager节点,方式二

动态删除DataNode节点与NodeManager节点的另一种方式,这种方式不需要删除workers文件中现有的Node3服务器配置。

在Node1节点上修改hdfs-site.xml文件,适当减小dfs.replication副本数,增加dfs.hosts.exclude配置如下

<property>
<name>dfs.replication</name>  --副本数
<value>2</value>
</property>
<property>
    <name>dfs.hosts.exclude</name>  --
<value>/data/hadoop/etc/hadoop/excludes</value>
</property>

在node1服务器上的/data/hadoop/etc/hadoop/目录下创建excludes文件,将要删除的Node3服务器节点的主机名或IP地址配置到这个文件中

[root@node1 sbin]# vim /data/hadoop/etc/hadoop/excludes
node3

刷新节点,在node1服务器上执行如下命令,刷新Hadoop集群节点

[root@node1 sbin]# hdfs dfsadmin -refreshNodes
Refresh nodes successful
[root@node1 sbin]# /data/hadoop/sbin/start-balancer.sh

查看节点

Hadoop 节点扩容

[root@node1 sbin]# hdfs dfsadmin -report
Configured Capacity: 57487130624 (53.54 GB)
Present Capacity: 37086025416 (34.54 GB)
DFS Remaining: 36312170496 (33.82 GB)
DFS Used: 773854920 (738.01 MB)
DFS Used%: 2.09%
Replicated Blocks:
	Under replicated blocks: 0
	Blocks with corrupt replicas: 0
	Missing blocks: 0
	Missing blocks (with replication factor 1): 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0
Erasure Coded Block Groups: 
	Low redundancy block groups: 0
	Block groups with corrupt internal blocks: 0
	Missing block groups: 0
	Low redundancy blocks with highest priority to recover: 0
	Pending deletion blocks: 0

-------------------------------------------------
Live datanodes (3):

Name: 10.168.1.121:9866 (node1)
Hostname: node1
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 386932743 (369.01 MB)
Non DFS Used: 8837644281 (8.23 GB)
DFS Remaining: 19518988288 (18.18 GB)
DFS Used%: 1.35%
DFS Remaining%: 67.91%
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: Sun Jul 04 13:34:45 CST 2021
Last Block Report: Sun Jul 04 13:33:30 CST 2021
Num of Blocks: 5


Name: 10.168.1.123:9866 (node3)
Hostname: node3
Decommission Status : Decommissioned
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 254644224 (242.85 MB)
Non DFS Used: 7587172352 (7.07 GB)
DFS Remaining: 20901748736 (19.47 GB)
DFS Used%: 0.89%
DFS Remaining%: 72.72%
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: Sun Jul 04 13:34:44 CST 2021
Last Block Report: Sun Jul 04 13:33:30 CST 2021
Num of Blocks: 3


Name: 10.168.1.124:9866 (node4)
Hostname: node4
Decommission Status : Normal
Configured Capacity: 28743565312 (26.77 GB)
DFS Used: 386922177 (369.00 MB)
Non DFS Used: 11563460927 (10.77 GB)
DFS Remaining: 16793182208 (15.64 GB)
DFS Used%: 1.35%
DFS Remaining%: 58.42%
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: Sun Jul 04 13:34:44 CST 2021
Last Block Report: Sun Jul 04 13:33:30 CST 2021
Num of Blocks: 5
继续阅读
scadm
  • 本文由 发表于 2021年7月4日12:12:31
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Hadoop概念 Hadoop实现了一个分布式文件系统( Distributed File System),其中一个组件是HDFS。HDFS有高容错性的特点,并且设计用来部署在低廉的(low-cost...
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ceph简介: Ceph是一种为优秀的性能、可靠性和可扩展性而设计的统一的、分布式文件系统。ceph 的统一体现在可以提供文件系统、块存储和对象存储,分布式体现在可以动态扩展。在国内一些公司的云环境中...
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查找镜像文件 # 在Docker官方仓库中搜索Nginx镜像,Nginx镜像文件中只包含Nginx软件程序、数据文件 # docker search nginx NAME DESCRIPTION ST...
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本篇文章主要收集一些运维经常遇到的报错,记录下来方便以后查看,以及一些报错的解决方法。 1,启动docker容器报write /proc/self/attr/keycreate: permission...