add/delete node(hadoop)

  1. 无论是在Hadoop集群中添加机器和删除机器，都无需停机，整个服务不中断。
  2. master/conf/slaves 添加 newnodename
  3. master start-all.sh

safe mode when delete node:

  1. 创建 master/conf/nn-excluded-list
  2. 添加 deletednodename
  3. 修改 master/conf/hdfs-site.xml

    <property>

    <name>dfs.hosts.exclude</name>

    <value>conf/nn-excluded-list</value>

    </property>

  4. master:  $HADOOP_HOME/bin/hadoop dfsadmin -refreshNodes
  5. HDFS Cluster  : hp3机器已经处于Decommission In Progress状态 ； MR 可能还在 in service
  6. 等待hp3中datanode的Decommission操作完成以后，再到hp3机器中关闭所有的Hadoop进程。
时间： 2024-11-09 05:03:34

add/delete node(hadoop)的相关文章

leetcode_237题——Delete Node in a Linked List（链表）

Delete Node in a Linked List Total Accepted: 6113 Total Submissions: 12798My Submissions Question Solution Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2

leetCode 237. Delete Node in a Linked List 链表

237. Delete Node in a Linked List Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked

leetcode:237 Delete Node in a Linked List－每日编程第四题

Delete Node in a Linked List Total Accepted: 47385 Total Submissions: 107608 Difficulty: Easy Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 ->

237. Delete Node in a Linked List（C++）

237. Delete Node in a Linked Lis t Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked

[LeetCode][JavaScript]Delete Node in a Linked List

Delete Node in a Linked List Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list

[CareerCup] 2.3 Delete Node in a Linked List 删除链表的节点

2.3 Implement an algorithm to delete a node in the middle of a singly linked list, given only access to that node.EXAMPLEInput: the node c from the linked list a->b->c->d->eResult: nothing is returned, but the new linked list looks like a- >

237. Delete Node in a Linked List

1. 问题描述 Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should become 1 ->

237.单链表移除节点 Delete Node in a Linked List

Question Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should become 1 ->

LeetCode (237):Delete Node in a Linked List

Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should become 1 -> 2 ->