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Re: New Hadoop Eclipse functionality - HDFS - [mail # user]
...Hi Srimanth,  This is great, I just went over the pages - many thanks for sharing! Does this support hadoop-2 as well?  Note though that the Apache Incubator also hosts a project w...
   Author: Harsh J, 2013-06-11, 07:36
Re: Why my tests shows Yarn is worse than MRv1 for terasort? - HDFS - [mail # user]
...Not tuning configurations at all is wrong. YARN uses memory resource based scheduling and hence MR2 would be requesting 1 GB minimum by default, causing, on base configs, to max out at 8 (du...
   Author: Harsh J, 2013-06-07, 03:58
[HDFS-2936] File close()-ing hangs indefinitely if the number of live blocks does not match the minimum replication - HDFS - [issue]
...If an admin wishes to enforce replication today for all the users of their cluster, he may set dfs.namenode.replication.min. This property prevents users from creating files with < expect...
http://issues.apache.org/jira/browse/HDFS-2936    Author: Harsh J, 2013-06-06, 14:34
Re: Hadoop JARs and Eclipse - HDFS - [mail # user]
...If your goal is to simply build an application, then you can use a Maven project. Why do you require the whole of Hadoop's projects itself on Eclipse when you can simply have the dependencie...
   Author: Harsh J, 2013-06-05, 17:43
Re: YARN servers and ports - HDFS - [mail # user]
...If you're asking in terms of discovering where to communicate at, then basically just the RM scheduler address and port (yarn.resourcemanager.scheduler.address).  The NodeManager addres...
   Author: Harsh J, 2013-06-05, 17:18
Re: Recover dfs/name - HDFS - [mail # user]
...If /tmp/hadoop-user/dfs/namesecondary doesn't exist now, then yes, you need to start over. Try keeping multiple copies and on a location thats off-/tmp (use dfs.name.dir config).  On We...
   Author: Harsh J, 2013-06-05, 10:51
Re: possible to change replication factor at file creation time (with copyFromLocal)? - HDFS - [mail # user]
...Hi Julian,  Yes, "dfs" subcommand accepts config overrides via -D. Just do "hadoop dfs -Ddfs.replication=X -copyFromLocal …".  On Fri, May 31, 2013 at 10:27 PM, Julian Bui  wr...
   Author: Harsh J, 2013-05-31, 17:03
Re: splittable vs seekable compressed formats - HDFS - [mail # user]
...SequenceFiles should be seekable provided you know/manage their sync points during writes I think. With LZO this may be non-trivial.  On Thu, May 23, 2013 at 11:01 PM, John Lilley  ...
   Author: Harsh J, 2013-05-24, 06:52
Re: Is there a way to limit # of hadoop tasks per user at runtime? - HDFS - [mail # user]
...The only pain point I'd find with CS in a multi-user environment is its limitation of using queue configs. Its non-trivial to configure a queue per user as CS doesn't provide any user level ...
   Author: Harsh J, 2013-05-23, 18:24
[HDFS-4224] The dncp_block_verification log can be compressed - HDFS - [issue]
...On some systems, I noticed that when the scanner runs, the dncp_block_verification.log.curr file under the block pool gets quite large (several GBs). Although this is rolled away, we could a...
http://issues.apache.org/jira/browse/HDFS-4224    Author: Harsh J, 2013-05-23, 18:02
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