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From Harsh J <ha...@cloudera.com>
Subject Re: HDFS-347 and HDFS-2246 issues different
Date Mon, 08 Oct 2012 12:34:56 GMT
As HDFS-2246 itself states in one comment:

HDFS-347 discusses ways to optimize reads for local clients. A clean
design is fairly involved. A shortcut has been proposed where the
client access the hdfs file blocks directly; this works if the client
is the same user/group as the DN daemon. This is non-invasive and is a
good short term solution till HDFS-347 is completed.

HDFS-347, when done, would not have the user/group limitation (you may
call that a security/permissions problem as well), among other things.
Going over the JIRA's comments should give you more insight :)

On Mon, Oct 8, 2012 at 3:36 PM, jlei liu <liulei412@gmail.com> wrote:
> The two issues both implement  DFSClient to directly open data blocks that
> happen to be on the same machine function.  What are advantage of  HDFS-347?
> Thanks,
> LiuLei

Harsh J

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