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 <liulei...@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
