Hi Brian

Use the where clause and num mappers together to specify the total data volume to be imported at a time and how this load has to be distributed between tasks.
Bejoy KS

Sent from handheld, please excuse typos.

From: Brian Tran <brian@box.com>
Date: Thu, 24 May 2012 00:04:22 -0700
To: <user@sqoop.apache.org>
ReplyTo: user@sqoop.apache.org
Subject: Sqoop downloads split into chunks

Hi Sqoop gurus,

I currently use Sqoop to import from MySQL into HDFS.

Some of the tables that I import have become significantly larger to the point that a full dump significantly slows down the host.

I would like to split the imports into smaller chunks, but limit the number of chunks I download in parallel to avoid significant load on the server.

Is there anything in Sqoop that provides this functionality?

The closest thing I could find in the Sqoop user guide was the --num-mappers option, but using it to download in smaller chunks would increase the server load as all the chunks are downloaded in parallel.