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From Imran M Yousuf <imyou...@gmail.com>
Subject Re: Porting SQL DB into HBASE
Date Wed, 14 Apr 2010 06:03:56 GMT
On Mon, Apr 12, 2010 at 2:55 PM, kranthi reddy <kranthili2020@gmail.com> wrote:
>
> <snip />
> The problem is denormalising these 20% tables is also extremely difficult
> and we are planning to port them directly into hbase. And also denormalising
> these tables would lead to a lot of redundant data.
>

When denormalisation is been mentioned, it is implied having redundant
data. The idea is as there is no join instead of doing N lookups (to
replace N joins) keeping redundant data will allow you to do a single
lookup and furthermore, HBase is great in scaling huge data sets.

When I started reading http://wiki.apache.org/hadoop/Hbase/FAQ#A20 it
helped me understand it further.

Hope this helps.

Best regards,

--
Imran M Yousuf
Entrepreneur & Software Engineer
Smart IT Engineering
Dhaka, Bangladesh
Email: imran@smartitengineering.com
Blog: http://imyousuf-tech.blogs.smartitengineering.com/
Mobile: +880-1711402557

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