Top "Hdfs" questions

Hadoop Distributed File System (HDFS) is the default file storage system used by Apache Hadoop.

how to add user in supergroup of hdfs in linux?

I was working on hdfs then i found something that permissions checks are not performed for the super-user. If my …

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Hadoop in renaming files

Is there a simple command for hadoop that can change the name of a file (in the HDFS) from its …

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Unable to instantiate HiveMetaStoreClient

I have a 3 nodes cluster running hive. When i try to run some test from outside the cluster i am …

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Where HDFS stores files locally by default?

I am running hadoop with default configuration with one-node cluster, and would like to find where HDFS stores files locally. …

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Merging hdfs files

I have 1000+ files available in HDFS with a naming convention of 1_fileName.txt to N_fileName.txt. Size of each …

hadoop hdfs
How do I copy files from S3 to Amazon EMR HDFS?

I'm running hive over EMR, and need to copy some files to all EMR instances. One way as I understand …

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Hadoop 2.2 Installation `.' no such file or directory

I have installed Hadoop and HDFS using this tutorial http://codesfusion.blogspot.com/2013/10/setup-hadoop-2x-220-on-ubuntu.html Everything is fine. …

hadoop hdfs
name node Vs secondary name node

Hadoop is Consistent and partition tolerant, i.e. It falls under the CP category of the CAP theoram. Hadoop is …

hadoop hdfs hadoop2 high-availability
Scalable Image Storage

I'm currently designing an architecture for a web-based application that should also provide some kind of image storage. Users will …

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How does Hadoop process records split across block boundaries?

According to the Hadoop - The Definitive Guide The logical records that FileInputFormats define do not usually fit neatly into …

hadoop split mapreduce block hdfs