top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Hadoop upgrading/migrating downtime from Apache Hadoop 1.x to 2.x

+4 votes
396 views

I want to know while upgrading/migrating from Apache Hadoop 1.x to 2.x(MRv2YARN) in a production cluster of several nodes is there any *ANTICIPATED DOWNTIME* that one needs to be aware of?

posted Jan 16, 2014 by Deepti Singh

Looking for an answer?  Promote on:
Facebook Share Button Twitter Share Button LinkedIn Share Button

Similar Questions
0 votes

I had a quick google and can't find any documentation on rolling upgrade, does anyone know how to upgrade from Hadoop 2.3 to 2.4?

+1 vote

I currently have a hadoop 2.0 cluster in production, I want to upgrade to latest release.
current version: hadoop version Hadoop 2.0.0-cdh4.6.0

Cluster has the following services:
hbase hive hue impala mapreduce oozie sqoop zookeeper

Can someone point me to how to upgrade hadoop from 2.0 to hadoop 2.4.0?

+2 votes

Apache Hadoop includes HDFS Federation.
Does anyone know how to migrate Apache Hadoop 1.x HDFS to Apache Hadoop 2.x HDFS?

I am getting the following error:

$ bin/hdfs start namenode --config $HADOOP_CONF_DIR -upgrade -clusterId 
Error: Could not find or load main class start 
+1 vote

We plan to migrate a 30 nodes hadoop 1.0.1 cluster to the version 2.3.0. We dont have extra machines to setup a separate new cluster, thus hope to do an in-place migration by replacing the components on the existing computers. So the questions are:

1) Is it possible to do an in-place migration, while keeping all data in HDFS safely?
2) If it is yes, is there any doc/guidance to do this?
3) Is the 2.0.3 MR API binary compatible with the one of 1.0.1?

+1 vote

I want to upgrade my cluster ,in doc,one of step is backup namenode dfs.namenode.name.dir directory.
I have two directories defined in hdfs-site.xml, should I backup them all ,or just one of them?

dfs.namenode.name.dir
file:///data/namespace/1,file:///data/namespace/2
...