Thanks, besides the checksum data is there anything else? Data in name node? Date: Tue, 20 Nov 2012 23:14:06 -0800 Subject: Re: Is there an additional overhead when storing data in HDFS? From: [email protected] To: [email protected]
HDFS uses 4GB for the file + checksum data. Default is for every 512 bytes of data, 4 bytes of checksum are stored. In this case additional 32MB data. On Tue, Nov 20, 2012 at 11:00 PM, WangRamon <[email protected]> wrote: Hi All I'm wondering if there is an additional overhead when storing some data into HDFS? For example, I have a 2GB file, the replicate factor of HDSF is 2, when the file is uploaded to HDFS, should HDFS use 4GB to store it or more then 4GB to store it? If it takes more than 4GB space, why? Thanks Ramon -- http://hortonworks.com/download/
