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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 07:53:00 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:
Conceptual table view

------------------------------------------------------------------------------
  [[Anchor(schema)]]
  = Configuration / Schema Definition =
  
+ 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:
+ 
+ ||<:|2> '''Row Key''' ||<:|2> '''Time Stamp''' ||<:|2> '''Column''' ''"contents:"''
|||| '''Family''' ''"anchor:"'' ||
+ ||<:> '''key''' ||<:> '''value''' ||
+ ||<^|5> "com.cnn.www" ||<:> t9 || ||<)> "cnnsi.com" ||<:> "CNN"
||
+ ||<:> t8 || ||<)> "my.look.ca" ||<:> "CNN.com" ||
+ ||<:> t6 ||<:> "<html>..." || || ||
+ ||<:> t5 ||<:> `"<html>..."` || || ||
+ ||<:> t3 ||<:> `"<html>..."` || || ||
+ 
+ ''still to come: how tables are physically stored''
+ 
   * Tablet Size
   * Columns are organized into Locality Groups. Separate SSTable(s) are generated for each
locality group in each table.
    * Access Control

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