Extract data from MongoDB with Sqoop to write on HDFS??

I am concerning about extracting data from MongoDB where my application transact most of the data from MongoDB. I ...

Default Namenode port of HDFS is 50070.But I have come across at some places 8020 or 9000?

When I setup the hadoop cluster, I read the namenode runs on 50070 and I set up accordingly and it's running fine. ...

Where does Hive store files in HDFS??

I'd like to know how to find the mapping between Hive tables and the actual HDFS files (or rather, directories) that...

Why is there no 'hadoop fs -head' shell command??

A fast method for inspecting files on HDFS is to use tail: ~$ hadoop fs -tail /path/to/file This displays the las...

How to find Hadoop hdfs directory on my system??

How to find Hadoop HDFS directory on my system? I need this to run following command - hadoop dfs -copyFromLocal &...

hadoop connection refused on port 9000?

I want to setup a hadoop-cluster in pseudo-distributed mode for development. Trying to start the hadoop cluster fail...

Difference between `load data inpath ` and `location` in hive??

At my firm, I see these two commands used frequently, and I'd like to be aware of the differences, because their fun...

Difference between `yarn.scheduler.maximum-allocation-mb` and `yarn.nodemanager.resource.memory-mb`??

What is difference between yarn.scheduler.maximum-allocation-mb and yarn.nodemanager.resource.memory-mb? I see both...

Checksum verification in Hadoop?

Do we need to verify checksum after we move files to Hadoop (HDFS) from a Linux server through a Webhdfs ? I would ...

How to find the size of a HDFS file?

How to find the size of a HDFS file? What command should be used to find the size of any file in HDFS. ...

Append data to existing file in HDFS Java?

I'm having trouble to append data to an existing file in HDFS. I want that if the file exists then append a line, if...

How to specify username when putting files on HDFS from a remote machine?

I have a Hadoop cluster setup and working under a common default username "user1". I want to put files into hadoop f...

Where does Hive store files in HDFS??

I'd like to know how to find the mapping between Hive tables and the actual HDFS files (or rather, directories) that...