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Re: Question on the number of column families - HBase - [mail # user]
...One way to model the data would be to use a composite key that is madeup of the RDMS primary_key + "." + field_name. Then just have a singlecolumn that contains the value of the field.Indivi...
   Author: Alok Singh, 2014-08-05, 22:18
[MAPREDUCE-1776] Hadoop should provide a simplified way of fetching user-logs - MapReduce - [issue]
...Hi,   Currently , in both streaming and normal mode hadoop mapred program, user can't download the logs programatically.jobclient.output.filter=ALL, allows user to print output in ...
http://issues.apache.org/jira/browse/MAPREDUCE-1776    Author: Alok Singh, 2014-07-30, 17:41
Re: Distributed log splitting failing after cluster outage. - HBase - [mail # user]
...We ran into this a few weeks ago when while adding new nodes into anexisting cluster. Due to a misconfiguration, the new nodes were assigned awrong zookeeper quorum, and ended up forming a n...
   Author: Alok Singh, 2014-03-06, 19:33
Re: X3 slow down after moving from HBase 0.90.3 to HBase 0.92.1 - HBase - [mail # user]
...Do your PUTs and GETs have small amounts of data? If yes, then you can increase the number of handlers. We have a 8-node cluster on 0.92.1, and these are some of the setting we changed from ...
   Author: Alok Singh, 2012-11-21, 04:53
Re: 0.92 and Read/writes not scaling - HBase - [mail # user]
...Sorry for jumping on this thread late, but, I have seen very similar behavior in our cluster with hadoop 0.23.2 (CDH4B2 snapshot) and hbase 0.23.1. We have a small, 7 node cluster (48GB/16Co...
   Author: Alok Singh, 2012-04-02, 17:15
Re: What about storing binary data(e.g. images) in HBase? - HBase - [mail # user]
...I built a distributed FS on top of cassandra a while ago, pretty sure the same approach will work on hbase too.  1. Create a two tables: file_info, file_data 2. Break each file into chu...
   Author: Alok Singh, 2012-03-07, 07:35
.logs directory keeps growing - HBase - [mail # user]
...Environment Hbase: 0.92 Hadoop: hadoop-0.20.2-cdh3u3  I am testing hbase 0.92 for a new storage system we are building. In the tests, I insert around 2-3 billion rows and then run some ...
   Author: Alok Singh, 2012-02-22, 23:03
[expand - 1 more] - Re: NotReplicatedYetException when gracefully shutting down a region server. - HBase - [mail # user]
...J-D,  On the regionserver, I see these lines: 2011-12-28 18:56:37,821 - INFO [regionserver7040.cacheFlusher:Store@494] - Renaming flushed file at hdfs://richpush-master-0:7080/richpush/...
   Author: Alok Singh, 2012-01-04, 00:14
[MAPREDUCE-1773] streaming doesn't support jobclient.output.filter - MapReduce - [issue]
...the streaming Jobclient implementation i.e contrib/streaming/src/java/org/apache/hadoop/streaming/StreamJob.java is significantly different than the core hadoop mapred/org/apache/hadoop/mapr...
http://issues.apache.org/jira/browse/MAPREDUCE-1773    Author: Alok Singh, 2011-12-12, 06:20
[MAPREDUCE-1589] Need streaming examples in mapred/src/examples/streaming - MapReduce - [issue]
...The examples directory contains the examples for pipes, java mapred but not for the streaming.We are planning to add the test cases for the streaming in the examples respository...
http://issues.apache.org/jira/browse/MAPREDUCE-1589    Author: Alok Singh, 2011-01-13, 02:29
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