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Re: upgrade from primary + secondary NN to active + standby NN - HDFS - [mail # user]
...FWIW, I've seen through a lot of upgrades from 1.x to 2.x and metadata issue's never been a part of it. You should be able to safely upgrade and then to configure HA. Note that you cannot di...
   Author: Harsh J, 2013-05-22, 04:55
Re: Recovering the namenode from failure - HDFS - [mail # user]
...I think he's mentioned the new NN is the same IP and Hostname as the old one, and uses an actual checkpoint. All he has to do is start the DNs back up again and they should report in fine. &...
   Author: Harsh J, 2013-05-22, 03:46
Re: [VOTE] Plan to create release candidate for 0.23.8 - HDFS - [mail # dev]
...+1  On Sat, May 18, 2013 at 2:40 AM, Thomas Graves  wrote:    Harsh J...
   Author: Harsh J, 2013-05-18, 02:19
Re: Question about writing HDFS files - HDFS - [mail # user]
...Thanks for the clarification Rahul. In that case, then the reading is correct (and that a HDFS client behaves the same, in and out of MR - its not really related to MR at all).  A "clie...
   Author: Harsh J, 2013-05-17, 05:12
[HDFS-1804] Add a new block-volume device choosing policy that looks at free space - HDFS - [issue]
...HDFS-1120 introduced pluggable block-volume choosing policies, but still carries the vanilla RoundRobin as its default.An additional implementation that also takes into consideration the fre...
http://issues.apache.org/jira/browse/HDFS-1804    Author: Harsh J, 2013-05-17, 00:30
Re: Map Tasks do not obey data locality principle........ - HDFS - [mail # user]
...Also, does your custom FS report block locations in the exact same format as how HDFS does?  On Tue, May 14, 2013 at 4:25 PM, Agarwal, Nikhil  wrote:    Harsh J...
   Author: Harsh J, 2013-05-15, 21:01
[HDFS-3628] The dfsadmin -setBalancerBandwidth command on branch-1 does not check for superuser privileges - HDFS - [issue]
...The changes from HDFS-2202 for 0.20.x/1.x failed to add in a checkSuperuserPrivilege();, and hence any user (not admins alone) can reset the balancer bandwidth across the cluster if they wis...
http://issues.apache.org/jira/browse/HDFS-3628    Author: Harsh J, 2013-05-15, 06:16
Re: 600s timeout during copy phase of job - HDFS - [mail # user]
...Hi David,  A Reduce task's percentage is a good indicator of the phase it is in: First 33% is the COPY phase, 33-66% is the SORT phase and 66-100% is the user-code-progress phase.  ...
   Author: Harsh J, 2013-05-13, 16:42
Re: Install Hadoop on Linux Pseudo Distributed Mode - Root Required? - HDFS - [mail # user]
...Raj,  Apache Hadoop by itself does not require root privileges to run (assuming a non-secure setup). You can run it out of a tarball from a home directory you have on the server machine...
   Author: Harsh J, 2013-05-13, 16:34
Re: Wrapping around BitSet with the Writable interface - HDFS - [mail # user]
...You can perhaps consider using the experimental JavaSerialization [1] enhancement to skip transforming to Writables/other-serialization-formats. It may be slower but looks like you are looki...
   Author: Harsh J, 2013-05-12, 20:09
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