Namenode failure and recovery in Hadoop

Ask Time：2013-11-21T14:38:42 Author：Nagendra kumar

How does Hadoop determine that the Namenode has failed or is not working?

I know that in Hadoop the Namenode is the main point which keeps all the metadata, recognizes the failure of datanodes by heartbeats, and opts for replication of data in case of datanode failure.

If the Namenode fails, which system recognizes the failure, and what is the recovery process?

Author:Nagendra kumar，eproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/20114123/namenode-failure-and-recovery-in-hadoop

More about “Namenode failure and recovery in Hadoop” related questions

Namenode failure and recovery in Hadoop

How does Hadoop determine that the Namenode has failed or is not working? I know that in Hadoop the Namenode is the main point which keeps all the metadata, recognizes the failure of datanodes by
Hadoop namenode : Single point of failure

The Namenode in the Hadoop architecture is a single point of failure. How do people who have large Hadoop clusters cope with this problem?. Is there an industry-accepted solution that has worked...
how does hadoop v 2 handles the failure of namenode

In hadoop v 1 namenode is single point of failure but hadoop v 2 overcome to this problem but how does hadoop v 2 handles the failure of namenode
Is JobTracker a single point of failure too (besides NameNode) in Hadoop?

I am new to Hadoop. In hadoop, I know that when a NameNode fails the entire Hadoop framework goes down. So it's a single point of failure in Hadoop. Is it same for JobTracker? Because if the JobTra...
Namenode In hadoop cluster not started after electricity failure

We have Hadoop cluster with ambari HDP 2.6.5 version , include 2 namenodes Because electricity failure , both namenode not started On the first namenode we can see the following behavior , wit...
Hadoop Namenode startup failure due to InconsistentFSSStateException

I am setting up a Hadoop (v1.1.1) cluster on Windows Azure. I am trying to launch the namenode process by using: service hadoop-namenode start However I am consistently getting the following error
Namenode Recovery

We know that Namenode will maintain metadata in memory and periodically(1hr by default) Secondary Namenode will collect that data and persist for backup. If the Namenode gone down after 55 mins of
Hadoop installation : configuring Namenode failure

Trying to format the NameNode to create a Hadoop Distributed File System (HDFS) using below command: $ bin/hadoop namenode –format and the error while executing the commnad: bin/hadoop: line 351: -
namenode recovery hadoop 2.x(active and passive namenode)

in hadoop 2.X we are having the concept of active namenode and passive namenode and both used to write fsimage and editlogs to a shared location. what happens when cluster looses the access to that
Why Hadoop using namenode and datanode?

We know that servers which used for big data processing should be tolerant with hardware failure. I mean, if we had 3 server (A, B, C) and suddenly the B server is down, A and C could replace it po...

Namenode failure and recovery in Hadoop

Namenode failure and recovery in Hadoop

Hadoop namenode : Single point of failure

how does hadoop v 2 handles the failure of namenode

Is JobTracker a single point of failure too (besides NameNode) in Hadoop?

Namenode In hadoop cluster not started after electricity failure

Hadoop Namenode startup failure due to InconsistentFSSStateException

Namenode Recovery

Hadoop installation : configuring Namenode failure

namenode recovery hadoop 2.x(active and passive namenode)

Why Hadoop using namenode and datanode?

热门文章

jpg图片怎么转换成pdf，详细教程分享！

iphone怎么把图片转成电子版？试试这2个方法！

图片如何转换pdf文件？看看这三个方法！

怎么把图片转换成pdf格式，干货教程不要错过

png图片怎么转换成pdf，实用方法不要错过

图片怎么转pdf格式？三种转换方法分享给你，一分钟轻松解决

图片转pdf格式怎么弄免费？get这五个简单的方法，轻松搞定！

如何将图片转pdf格式？4种转换方法分享给你，一分钟轻松解决

如何图片转pdf免费？快学习这三种免费转换方法

怎么将图片转pdf？分享个图片转pdf在线免费

相关搜索

jpg图片怎么转换成pdf，详细教程分享

电脑图片转pdf工具怎么用

单张pdf图片转照片格式

如何将图片转成pdf文档，经验分享

这么好用的图片转pdf软件，我一定要分享

干货分享，不懂图片转pdf的朋友快快收藏起来

分享一个让你惊叹不已的图片转pdf方法

图片转pdf工具

分享一个大家都不知道的图片转pdf格式方法

好用的图片转pdf软件要和好朋友分享