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Re: Does HBase supports parallel table scan if I use MapReduce - HBase - [mail # user]
...The scan will be broken up into multiple map tasks, each of which will run over a single split of the table (look at TableInputFormat to see how it is done).  The map tasks will run in ...
   Author: Jeff Kolesky, 2013-08-20, 16:02
Re: initTableMapperJob with a List of Scans - HBase - [mail # user]
...You should be able to get the table name from the split.  Within the map() method:  ((TableSplit)context.getInputSplit()).getTableName()  That will return the name of the tabl...
   Author: Jeff Kolesky, 2013-06-20, 16:38
[expand - 1 more] - Re: Problem with HFile lexical comparison - HBase - [mail # user]
...Last time I wrote directly to an HFile, I instantiated an HFile.Writer using this statement:          HFile.Writer writer = HFile.getWriterFactory(config)   &nb...
   Author: Jeff Kolesky, 2013-06-20, 00:23
[expand - 1 more] - Re: Extending HBase Metrics Framework - HBase - [mail # user]
...I have not written any code against the latest metrics, so I'm just searching around.  Take the advice with a grain of salt until a more experienced developer pipes up.  BaseSource...
   Author: Jeff Kolesky, 2013-06-06, 19:31
Re: Key Value collision - HBase - [mail # user]
...Except in the case of bulk loads; if you import cells with the same timestamp through a bulk load, the "last row" is non-deterministic.  Facebook fixed the issue, and the patch has been...
   Author: Jeff Kolesky, 2013-05-16, 20:05
[HBASE-8358] Add delete permission separate from full write permissions - HBase - [issue]
...Currently there are five permissions checked by HBase: read, write, exec, create, and admin.  An RDBMS allows for more fine-grained control over the operations, and it would be helpful ...
http://issues.apache.org/jira/browse/HBASE-8358    Author: Jeff Kolesky, 2013-04-17, 18:25
Re: Possible to delete a specific cell? - HBase - [mail # user]
...Yes, this behavior would be fantastic.  If you follow the Kiji/Wibi model of using many versioned cells, being able to delete a specific cell without deleting all cells prior to it woul...
   Author: Jeff Kolesky, 2013-03-07, 18:31
Re: how do counters work, client api? - HBase - [mail # user]
...One interesting post to read is from Lars H: http://hadoop-hbase.blogspot.com/2012/11/hbase-mvcc-and-built-in-atomic.html It describes how the atomic counter operations work.  Jeff &nbs...
   Author: Jeff Kolesky, 2013-03-06, 21:20
[AVRO-1209] Include immutable source templates with Maven plugin - Avro - [issue]
...It would be nice to have mostly immutable classes generated by the Maven plugin for the cases when people want to use Avro specific records as their first class model objects and want some a...
http://issues.apache.org/jira/browse/AVRO-1209    Author: Jeff Kolesky, 2012-12-10, 17:57
[expand - 2 more] - Re: Check for schema backwards compatibility - Avro - [mail # dev]
...Schema.java is an unfortunately large file.  Would it be a reasonable refactor (of course done as a separate unit of work) to pull out the nested classes of Schema children (NamedSchema...
   Author: Jeff Kolesky, 2012-11-19, 19:12
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