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Posted to user@hbase.apache.org by jackie <ja...@126.com> on 2014/12/04 04:00:27 UTC

Help,use the importtsv tools

dear all!
      I used  the importtsv tools trnaslate the txt file to the Hfile (hadoop 2.2.0 ,hbase 0.96.2).Map procedure have many the  concurent progress,but reduce procedure has always 1 progress.How do i improv the reduce the concurent progress?


    Thank u very much!
 
    Best regards!


    from jackie

Re: Help,use the importtsv tools

Posted by Shahab Yunus <sh...@gmail.com>.

You need to pre-split the table into regions as in this tool the number of
reducers are driven by the number of regions in the target table.

Read about it here:
http://hbase.apache.org/book/perf.writing.html
http://hortonworks.com/blog/apache-hbase-region-splitting-and-merging/

Regards,
Shahab


On Wed, Dec 3, 2014 at 10:00 PM, jackie <ja...@126.com> wrote:

> dear all!
>       I used  the importtsv tools trnaslate the txt file to the Hfile
> (hadoop 2.2.0 ,hbase 0.96.2).Map procedure have many the  concurent
> progress,but reduce procedure has always 1 progress.How do i improv the
> reduce the concurent progress?
>
>
>     Thank u very much!
>
>     Best regards!
>
>
>     from jackie