FAQ
It's more than running running a job(s), which i'm also doing. I'm also
becoming familiar with the managment, administration and tuning of a 8 node
test cluster. As I read web pages, books, etc., they all refer to the
environment variables (HADDOP_INSTALL, HADOOP_CLASSPATH,...).

The need to find the environment variables, Hadoop specific directories,
and config files is so common, ocurring everyday, these lists would be very
helpful.
thanks
John
On Tue, Apr 9, 2013 at 1:24 PM, Philip Langdale wrote:

Hi John,

You'll need to be more specific about what you're trying to do. There are
a bunch of environment variables that affect how Hadoop runs, and we do set
them as part of running a datanode, or tasktracker, etc, but these are not
all relevant to a client that's connecting to Hadoop to do work.

Under normal conditions, it's sufficient for a client to find the hadoop
configuration directory under /etc and use its contents to get up and
running. In this scenario, you don't need to set any extra variables.

If you can explain what your situation is, I can hopefully give you more
relevant information.

--phil

On 8 April 2013 22:43, John Meza wrote:

Is there a list of the environment variables that SCM creates when
installing CDH?
Many pages refer to HADOOP_HOME, HADOOP_INSTALL, etc.

Or does the user have to manually create the env variables if needed?
If so, is there a list of typical directories that SCM installs to?

thanks
John

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