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Re: HBase - number of regionserver used - HBase - [mail # user]
...Hi Andrea  Which version of HBase are u using? I assume you are using HBase 0.94, the default split policy is IncreasingToUpperBoundRegionSplitPolicy, which will split the region when i...
   Author: Jia Wang, 2013-11-22, 07:10
[expand - 1 more] - Re: Uneven write request to regions - HBase - [mail # user]
...Then the case is simple, as i said "check your row key design, you can find the start and end row key for each region, from which you can know why your request with a specific row key doesn'...
   Author: Jia Wang, 2013-11-15, 01:51
Re: Frequent scan time outs in multiple region servers in same time intervals - HBase - [mail # user]
...Is it a Scan for Map/Reduce? Or it's only a regular scan in which case maybe you could consider to set the start and end position of your scan to limit the operation.  Thanks Ramon &nbs...
   Author: Jia Wang, 2013-11-14, 10:54
[expand - 1 more] - Re: Get HBase Read and Write requests per second separately - HBase - [mail # user]
...I don't think so.  Thanks Ramon   On Thu, Nov 14, 2013 at 12:07 PM, Sandeep L wrote:  ...
   Author: Jia Wang, 2013-11-14, 10:15
[expand - 1 more] - Re: 答复: Save the bandwidth usage - HBase - [mail # user]
...Yes, the SNAPPY compression has been enabled already, which i don't think help too much cause we are generating random characters.  The duplication factor is 3 by default in Hadoop, we ...
   Author: Jia Wang, 2013-11-14, 10:15
How to verify your COMPRESSION policy takes work? - HBase - [mail # user]
...Hi Folks  I added COMPRESSION value after creating a table, so here is the table description:  {NAME => 'SPLIT_TEST_BIG', SPLIT_POLICY => 'org.apache.hadoop.hbase.regionserve...
   Author: Jia Wang, 2013-11-13, 10:57
Re: HBase as a transformation engine - HBase - [mail # user]
...Keep a separate Hadoop cluster only focus on analyse is a better way to go, the HBase cluster is only for collecting data. You can use distcp to copy data between the two cluster which is fa...
   Author: Jia Wang, 2013-11-13, 09:17
So where is the store file flushed to? - HBase - [mail # user]
...Hi Folks  "When something is written to HBase, it is first written to an in-memory store (memstore), once this memstore reaches a certain size, it is flushed to disk into a store file."...
   Author: Jia Wang, 2013-11-07, 15:27
Re: HBase Delete - based on non-rowkey columns - HBase - [mail # user]
...1)   In HBASE, is it possible to delete a row  based on a column name &  value.   The column name should not be a row key, because in this scenario we cannot delete  ...
   Author: Jia Wang, 2013-11-06, 09:20
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