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From Alex Loddengaard <a...@cloudera.com>
Subject Re: The mechanism of choosing target datanodes
Date Thu, 23 Apr 2009 18:16:15 GMT
I believe the blocks will be distributed across data nodes and not local to
only one data node.  If this wasn't the case, then running a MR job on the
file would only be local to one task tracker.


On Thu, Apr 23, 2009 at 2:14 AM, Xie, Tao <xietao1981@gmail.com> wrote:

> If a cluster has many datanodes and I want to copy a large file into DFS.
> If the replication number is set to 1, does the namenode will put the file
> data on one datanode or several nodes? I wonder if the file will be split
> into blocks then different unique blocks are on different datanodes.
> --
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