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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "Hbase/HbaseArchitecture" by JimKellerman
Date Tue, 06 Feb 2007 08:34:40 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 JimKellerman:
http://wiki.apache.org/lucene-hadoop/Hbase/HbaseArchitecture

The comment on the change is:
Add extra column to conceptual view, citation

------------------------------------------------------------------------------
  
  Conceptually a table may be thought of a collection of rows that
  are located by a row key (and optional timestamp) and where any column
- may not have a value for a particular row key (sparse). For example:
+ may not have a value for a particular row key (sparse). The following example is a slightly
modified form of the one on page 2 of the [http://labs.google.com/papers/bigtable.html Bigtable
Paper].
  
- ||<:|2> '''Row Key''' ||<:|2> '''Time Stamp''' ||<:|2> '''Column''' ''"contents:"''
|||| '''Family''' ''"anchor:"'' ||
+ ||<:|2> '''Row Key''' ||<:|2> '''Time Stamp''' ||<:|2> '''Column''' ''"contents:"''
|||| '''Family''' ''"anchor:"'' ||<:|2> '''Column''' ''"mime:"'' ||
  ||<:> '''key''' ||<:> '''value''' ||
- ||<^|5> "com.cnn.www" ||<:> t9 || ||<)> "cnnsi.com" ||<:> "CNN"
||
+ ||<^|5> "com.cnn.www" ||<:> t9 || ||<)> "cnnsi.com" ||<:> "CNN"
|| ||
- ||<:> t8 || ||<)> "my.look.ca" ||<:> "CNN.com" ||
+ ||<:> t8 || ||<)> "my.look.ca" ||<:> "CNN.com" || ||
- ||<:> t6 ||<:> "<html>..." || || ||
+ ||<:> t6 ||<:> "<html>..." || || ||<:> "text/html" ||
- ||<:> t5 ||<:> `"<html>..."` || || ||
+ ||<:> t5 ||<:> `"<html>..."` || || || ||
- ||<:> t3 ||<:> `"<html>..."` || || ||
+ ||<:> t3 ||<:> `"<html>..."` || || || ||
  
  ''still to come: how tables are physically stored''
  

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