Management and Monitoring - Field Guide to Hadoop - page 54

Imagine the original server hosting our database has crashed and we need to point all the dif-
ferent processes that use that database to our failover. We'll update the value associated with
our key to point to the IP address of our failover:

[zk: localhost:3000(CONNECTED) 0] set /movie_reviews/database
'10.2.1.2'
<metadata>
dataVersion = 1
<metadata>

Now let's get the key one last time. Notice that we retrieve the new IP address and the ver-
sion has incremented to indicate that the value has changed:

[zk: localhost:3000(CONNECTED) 1] get /movie_reviews/database
'10.2.1.2'
<metadata>
dataVersion = 1
<metadata>

Oozie

License Apache License, Version 2.0

Activity High

Purpose A workflow scheduler to manage complex multipart Hadoop jobs

Official Page https://oozie.apache.org

Hadoop Integration Fully Integrated

You may be able to complete some of your data analytic tasks with a single MapReduce , Pig ,
or Hive job that reads its data from the Hadoop Distributed File System (HDFS, described