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Best way to profile a coprocessor - HBase - [mail # user]
...What is the best way to profile some co-processor code (running on the regionserver)? If you have done it successfully, what tips can you offer, and what unexpected problems did you encounte...
   Author: Tom Brown, 2012-05-10, 16:34
Re: terrible! I can't drop the table - HBase - [mail # user]
...I made a very similar mistake myself the other day when trying to reset my cluster.  What finally solved it was deleting the temp directory used by my data nodes (in my case I wanted to...
   Author: Tom Brown, 2012-05-07, 14:01
Re: aggregation performance - HBase - [mail # user]
...For our solution we are doing some aggregation on the server via coprocessors. In general, for each row there are 8 columns: 7 columns that contain numbers (for summation) and 1 column that ...
   Author: Tom Brown, 2012-05-03, 15:01
More tables, or add a prefix to each row key? - HBase - [mail # user]
...All,  I'm writing an OLAP cube database and I can implement the storage in one of two schemas, and I don't know if there's any unexpected performance trade-offs I'm not aware of.  ...
   Author: Tom Brown, 2012-04-19, 01:01
Re: Add client complexity or use a coprocessor? - HBase - [mail # user]
...kisalay,  Are you talking about storing all my data in a non-aggregate format, and just aggregating as needed?  If so, do you have any idea what kind of performance I should expect...
   Author: Tom Brown, 2012-04-11, 17:41
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