-Re: A question about the namenode's decision on the data placement of a new file
Vivi Lang 2012-08-25, 00:00
Thanks but I found that BlockPlacementPolicy only appear after 0.21.0? Is
there any similar class or function appeared in 0.20.
On Fri, Aug 24, 2012 at 6:03 PM, Andy Isaacson <[EMAIL PROTECTED]> wrote:
> On Fri, Aug 24, 2012 at 3:33 PM, wei xu <[EMAIL PROTECTED]> wrote:
> > I am doing some research on the data placement, but I am not quite
> > with the Hadoop, is there any one who can tell me when a new file be
> > into the HDFS, which function will be called by namenode to make a
> > on the allocation ( I mean, if there has a list of datanodes and the file
> > might be larger than 64MB, that is, several blocks may be included.
> > the function that decide the placement of those blocks to those
> You'll want to read BlockPlacementPolicy and its inheritors.