Namenode will have trivial amount of data stored in journal/fsimage. On Tue, Nov 20, 2012 at 11:21 PM, WangRamon <[email protected]> wrote:
> 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/ > > -- http://hortonworks.com/download/
