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?