Converting Many Small Files To A Sequence File In HDFS
Having a lot of small files in HDFS is not efficient for processing and also not good for NameNode metadata.…
4 years ago
Hadoop
How to run Hadoop without using SSH
The start-all.sh and stop-all.sh scripts in the hadoop/bin directory will use SSH to launch some of the Hadoop daemons. If…
6 years ago
How To Modify Hadoop Log Level
By default, Hadoop's log level is set to INFO. This can be too much for most instances, as it will…
6 years ago
Understanding the Hadoop MapReduce framework
This post introduces the MapReduce framework that enables you to write applications that process vast amounts of data, in parallel,…
6 years ago
CCA131 – Configure NameNode HA
Note: This post is part of the CCA Administrator Exam (CCA131) objectives series HDFS High Availability Overview A single NameNode…
6 years ago
CCA131 – Configuring HDFS snapshot Policy
Note: This post is part of the CCA Administrator Exam (CCA131) objectives series What is HDFS Snapshot Policy You can…
6 years ago
CCA 131 – Create/restore a snapshot of an HDFS directory (Using Cloudera Manager)
Note: This post is part of the CCA Administrator Exam (CCA131) objectives series HDFS Snapshot Directories in HDFS can be…
6 years ago
CCA131 – Create an HDFS user’s home directory
Note: This post is part of the CCA Administrator Exam (CCA131) objectives series In the exam, you may be asked…
6 years ago
CCA 131 – Configure HDFS ACLs
Note: This post is part of the CCA Administrator Exam (CCA131) objectives series The basis for Hadoop Access Control Lists…
6 years ago
CCA 131 – Rebalance the cluster
Note: This post is part of the CCA Administrator Exam (CCA131) objectives series In a long-running cluster, there might be…
6 years ago