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Re: Logic of isSplittable() of class FileInputFormat - Hadoop - [mail # user]
...Hi Sugandha,Take gz file as an example, It is not splittable because of the compressionalgorithm it is used.  It can not guarantee that one record is located inone block, if one record ...
   Author: Jeff Zhang, 2014-02-26, 08:37
Unmanaged application issue on YARN - Hadoop - [mail # user]
...Hi all,I build an ummanaged application and submit it to yarn ( hadoop 2.2). Butencounter the following exception:Caused by:org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.A...
   Author: Jeff Zhang, 2014-02-26, 05:38
[expand - 1 more] - Re: question about hadoop dfs - Hadoop - [mail # user]
...you can use the fsck command to find the block locations, here's one examplehadoop fsck /user/hadoop/graph_data.txt -blocks -locations -filesOn Sun, Jan 26, 2014 at 2:48 PM, EdwardKing  ...
   Author: Jeff Zhang, 2014-01-28, 02:10
[expand - 1 more] - Re: [YARN] TestDistributedShell failed in eclipse but successful in maven - Hadoop - [mail # user]
...Thanks, Vinod. It works.  Could you point me which part needs the JAVA_HOME env ?   On Thu, Jan 23, 2014 at 2:17 AM, Vinod Kumar Vavilapalli  wrote:  ...
   Author: Jeff Zhang, 2014-01-23, 01:23
Re: issue about total input byte of MR job - Hadoop - [mail # user]
...It depend on your input data.  E.g. your input consists of 10 files, each is 65M, then each file will take 2 mappers, overall it would cost 20 mappers, but the input size is actually 65...
   Author: Jeff Zhang, 2013-12-03, 08:41
Re: How can I remote debug application master - Hadoop - [mail # user]
...Thanks for the tips   On Tue, Nov 26, 2013 at 6:17 PM, Harsh J  wrote:  ...
   Author: Jeff Zhang, 2013-11-27, 01:30
Is there any design document for YARN - Hadoop - [mail # user]
...Hi ,  I am reading the yarn code, so wondering whether there's any design document for the yarn. I found the blog post on hortonworks is very useful. But more details document would be ...
   Author: Jeff Zhang, 2013-11-26, 05:34
Re: hadoop File loading - Hadoop - [mail # user]
...It will work as long as you consider the xml tag boundary in your RecordReader.  On Tue, Nov 22, 2011 at 9:20 AM, hari708  wrote:    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2011-11-22, 08:20
[expand - 2 more] - Re: Can not access hadoop cluster from outside - Hadoop - [mail # user]
...I find the reason. This is because I use different version of hadoop between server side and client. Seems CDH is not compatible with apache release version   On Fri, Jun 3, 2011 at 1:1...
   Author: Jeff Zhang, 2011-06-03, 01:13
[expand - 3 more] - Re: Is there any way to add jar when invoking hadoop command - Hadoop - [mail # user]
...Thanks, it works   On Wed, Mar 23, 2011 at 10:04 AM, James Seigel  wrote:    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2011-03-23, 02:37
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB