November 2014
Beginner to intermediate
326 pages
7h 4m
English
Content preview from Learning Hbase
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Storing data in HBase – logical view versus actual physical view
At a conceptual level, an HBase table can be seen as a sparse set of rows, but in actual storage, it is stored as per a column family. While defining a table, columns can be added or specified on the run in a column family. We must decide the number and name of the column family at the time of table creation, but columns can be added as required at any point in time while storing the data, and this is the beauty of schema-free when we use HBase.
The following is the logical view of how data is stored in HBase, but in actual these are stored separately with column families:
|
Row keys |
Time_Stamp |
Column family 1 (CF1) |
Column family 2 (CF2) | |||
|---|---|---|---|---|---|---|
|
CF1:Col 1 |
CF1:Col 2 |
CF2:Col 3 | ||||
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