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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "Bigtable&Sawzall" by udanax
Date Mon, 12 Feb 2007 10:12:59 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Lucene-hadoop Wiki" for change notification.

The following page has been changed by udanax:
http://wiki.apache.org/lucene-hadoop/Bigtable%26Sawzall

------------------------------------------------------------------------------
- 
  == BigTable Overview ==
  
  '''What is a BigTable?'''
@@ -20, +19 @@

  
  To help make a business decision, to find a way to meet the need of each customer, or to
find a product or a market that will bring big profits, we group together action logs of users
and create a User Table like the one below.  
  
- row [ user ], attribute columns [ search history, item buying log, post scrap log, Page
Viewing log, User neighborhood (blog), User active part (cafe) ]
+ ''row [ user ], attribute columns [ search history, item buying log, post scrap log, Page
Viewing log, User neighborhood (blog), User active part (cafe) ]''
  
  If we select two columns, the fact table in the above schema can be represented in a two-dimensional
table.
  
  [http://mirror.udanax.org/~udanax/rsync1/download/NB_BoardData_006002/Figure1.jpg]
  
-  'Who referred to document A?' 'What other documents do they also like?' 'What does a user
who actively participates in a online community X like to search?' 'Who are the neighbors
of this blog’s author?' 'What are social distances between them?' 
+ Who referred to document A?. What other documents do they also like?. What does a user who
actively participates in a online community X like to search?. Who are the neighbors of this
blog’s author?. What are social distances between them? 
  
  By finding out where new markets are being formed by managing and analyzing those user-related
data, we can analyze the evolution of services faster and more economically. 
  

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