CODEWITHSUNDEEP
javalinuxhadoopclouderacloudera-cdh
Rio mario
Rio mario

Reputation: 283

Hadoop installation directory

Which directory is Hadoop installed in Cloudera distribution? Is it in /usr/bin/hadoop?

[cloudera@quickstart opt]$ which hadoop
/usr/bin/hadoop

I know the software packages are to be installed inside /opt/ directory.

What does Apache recommend?

Upvotes: 5

Views: 4810

Answers (1)

Roman Nikitchenko
Roman Nikitchenko

Reputation: 13046

Actually if you use parcels for Cloudera CDH (which is recommended way to install it) it goes under /opt/cloudera/parcels/CDH which is in turn symlink to actual CDH parcel. Under this directory you will find structure very similar to what open source Apache Hadoop normally hase under /.

More, if you browse under / you will find Hadoop normal binaries being symlinks which point to CDH active parcel through alternatives. For example check /usr/bin/hadoop.

This installation strategy brings Cloudera with ability to activate new CDH in a second and it looks like normal Apache Hadoop structure. Under CDH parcel directory you will find 2-layer binaries structure. For example in contrast to normal Apache Hadoop with entry point /usr/bin/hadoop under CDH you will have /opt/cloudera/parcels/CDH/bin/hadoop entry point and actual script /opt/cloudera/parcels/CDH/lib/hadoop/bin/hadoop.

Libraries are placed in more proprietary manner. All JARS are under /opt/cloudera/parcels/CDH/jars and appropriate JARS in common library directory or product specific ones are just symlinks. For example check hbase specific libs: /opt/cloudera/parcels/CDH/lib/hbase/lib/.

Upvotes: 7

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