It is just for information's sake (cause it can be computed with the data collected). The space is accounted just to let you know that there's something being stored on the DataNodes apart from just the HDFS data, in case you are running out of space.
On Fri, Jul 8, 2011 at 10:18 AM, Sagar Shukla <[email protected]> wrote: > Hi Harsh, > Thanks for your reply. > > But why does it require non-DFS storage ? And why that space is accounted > differently from regular DFS storage ? > > Ideally, it should have been part of same storage. > > Thanks, > Sagar > > -----Original Message----- > From: Harsh J [mailto:[email protected]] > Sent: Thursday, July 07, 2011 6:04 PM > To: [email protected] > Subject: Re: Difference between DFS Used and Non-DFS Used > > DFS used is a count of all the space used by the dfs.data.dirs. The > non-dfs used space is whatever space is occupied beyond that (which > the DN does not account for). > > On Thu, Jul 7, 2011 at 3:29 PM, Sagar Shukla > <[email protected]> wrote: >> Hi, >> What is the difference between DFS Used and Non-DFS used ? >> >> Thanks, >> Sagar >> >> DISCLAIMER >> ========== >> This e-mail may contain privileged and confidential information which is the >> property of Persistent Systems Ltd. It is intended only for the use of the >> individual or entity to which it is addressed. If you are not the intended >> recipient, you are not authorized to read, retain, copy, print, distribute >> or use this message. If you have received this communication in error, >> please notify the sender and delete all copies of this message. Persistent >> Systems Ltd. does not accept any liability for virus infected mails. >> >> > > > > -- > Harsh J > > DISCLAIMER > ========== > This e-mail may contain privileged and confidential information which is the > property of Persistent Systems Ltd. It is intended only for the use of the > individual or entity to which it is addressed. If you are not the intended > recipient, you are not authorized to read, retain, copy, print, distribute or > use this message. If you have received this communication in error, please > notify the sender and delete all copies of this message. Persistent Systems > Ltd. does not accept any liability for virus infected mails. > > -- Harsh J
