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From Mario Casola <mario.cas...@gmail.com>
Subject Re: hive to hbase mapping
Date Fri, 14 Jun 2013 16:54:35 GMT
Hi Sanjay,

thanks for the response.

I need Hbase because is perfect for aggregating data through the counters,
and write performance is great.
Now the problem is...Which is the best way for loading periodically (every
hour for example) Hbase data in Hive table?

Mario



2013/6/14 Sanjay Subramanian <Sanjay.Subramanian@wizecommerce.com>

>  6 months back I was tasked with building a Data platform for logs and I
> benchmarked
> Hbase + Hive (queries were 8X slower)
> Hive only
>
>  So I decided for Hive option and am deploying that solution to
> production.
>
>  Couple of things u can think while u design if u really want to go
> HBase+Hive (also look at this http://hadoopstack.com/hive-on-hbase-part-1/
> )
> - Query only todays data in a Hive+Hbase architecture
> - Older data than one day query Hive only
>
>  Hope I am not diverting from your question and problem
>
>  sanjay
>
>   From: Mario Casola <mario.casola@gmail.com>
> Reply-To: "user@hive.apache.org" <user@hive.apache.org>
> Date: Friday, June 14, 2013 8:54 AM
> To: "user@hive.apache.org" <user@hive.apache.org>
> Subject: hive to hbase mapping
>
>    Hi,
>
>  I have a performance issue when I query HBase from Hive.
> My idea is to build the scenario below:
> 1. Collect data in hbase for aggregation purpose
> 2. Create an external table that map Hive to Hbase
> 3. Create a real Hive table
> 4. Periodically transfer data from hbase to Hive through "INSERTO INTO
> <real hive table> SELECT * FROM <external table> WHERE time = 201305212909"
>
>  Currently I'm doing a test on a Hbase table that has 70,000,000 rows and
> I'm trying to query this table with a single column value filter, like the
> query above.
> If I try this type of query directly in Hbase the response time is around
> 80 seconds.
> If I try the query in Hive shell, after 30 minutes, all the tasks (9 in my
> case) are 0,00% complete.
>
>  Which could be the problem?
>
>  thanks
> Mario
>
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