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Re: HDFS 1.1.0 - File Append - Hadoop - [mail # user]
...HBase does not use append(…) anywhere. It only syncs(…) over its WAL stream and although sync(…) was an API. Append on 1.x is pretty much broken for various edge cases and therefore also mar...
   Author: Harsh J, 2013-08-06, 15:59
Re: Hadoop Source - Hadoop - [mail # user]
...Hi Sathwik,  You only need hadoop-common today. The other two are maintained for historic purposes when the repositories were split across projects.  We have some docs on this at h...
   Author: Harsh J, 2013-08-06, 08:27
[HADOOP-7659] fs -getmerge isn't guaranteed to work well over non-HDFS filesystems - Hadoop - [issue]
...When you use fs -getmerge with HDFS, you are guaranteed file list sorting (part-00000, part-00001, onwards). When you use the same with other FSes we bundle, the ordering of listing is not g...
http://issues.apache.org/jira/browse/HADOOP-7659    Author: Harsh J, 2013-08-06, 06:49
Re: DataBlockScanner's rate limit - Hadoop - [mail # user]
...Hi,  The DataBlockScanner isn't responsible for the DN block reports at startup, which is a wholly different thread/process - it is a NN independent operation that merely verifies block...
   Author: Harsh J, 2013-08-02, 03:27
[expand - 2 more] - Re: Hang when add/remove a datanode into/from a 2 datanode cluster - Hadoop - [mail # user]
...As I said before, it is a per-file property and the config can be bypassed by clients that do not read the configs, place a manual API override, etc..  If you want to really define a ha...
   Author: Harsh J, 2013-08-01, 03:11
Re: can kerberos cause performance impack on hadoop cluster? - Hadoop - [mail # user]
...No it wouldn't, given it applies additional work only at the auth levels.  On Tue, Jul 30, 2013 at 8:26 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-31, 02:33
Re: Can a mapper forward its input text or does it have to copy it? - Hadoop - [mail # user]
...You can simply do the latter (example#2). The example#1 would work too, but seems unnecessary.  On Wed, Jul 31, 2013 at 1:38 AM, Matthieu Labour  wrote:    Harsh J...
   Author: Harsh J, 2013-07-31, 02:25
Re: Cannot write the output of the reducer to a sequence file - Hadoop - [mail # user]
...Hi,  Can you explain the problem you actually face in trying to run the above setup? Do you also set your reducer output types?  On Mon, Jul 29, 2013 at 4:48 PM, Pavan Sudheendra &...
   Author: Harsh J, 2013-07-29, 16:04
Re: HDFS block placement - Hadoop - [mail # user]
...Your thought is correct. If space is available locally, then it is automatically stored locally.  On Fri, Jul 26, 2013 at 5:14 PM, Lukas Kairies  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 13:32
Re: Types and SequenceFiles - Hadoop - [mail # user]
...There is a solution discussed in the mail you've quoted. Did you do that? Share your code snippets please?  On Fri, Jul 26, 2013 at 5:07 AM, qwerty  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 02:15
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