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From Kihwal Lee <kih...@yahoo-inc.com.INVALID>
Subject Re: HDFS Federation
Date Thu, 28 Apr 2016 14:57:41 GMT

(1) The client-facing counter part of federation is ViewFileSystem, aka client side mount
table.(2) Federation is supported in 2.7. There are test cases bringing up federated mini
cluster, so I assume setting up a pseudo distributed cluster is possible. I am not sure whether
all support scripts will work as is.

      From: Kun Ren <ren.hdfs@gmail.com>
 To: hdfs-dev@hadoop.apache.org 
 Sent: Wednesday, April 27, 2016 7:29 PM
 Subject: HDFS Federation
Hi Genius,

I have two questions about the HDFS Federation:
(1) Since there are multiple namenodes,  there should be some code that
analysis the client request and transfer  the request to the appropriate
namenode, could you please point to me where I can find the related code?

(2) .Also just confirm that the Hadoop 2.7.2 support HDFS Federation, but
in default there is only 1 namenode, is this correct? Meanwhile, do you
think it is possible to configure the HDFS Fderation in the pseudo
distributed mode in one node?

Thanks so much in advance.

Kun Ren

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