HyperTable is OpenSource Nosql Database.Its a Column based Database.

1. Hypertable
Presented By:-
kaushik v. Bhut
Jignesh M. Parmar

2. OverView
● Hypertable is a high performance, open source,
massively scalable database modeled after Bigtable,
Google's proprietary, massively scalable database.
==>Comparison to a Relational Database
● Hypertable is similar to a relational database in that it
represents data as tables of information, with rows and
columns, but that's about as far as the analogy goes. The
following is a list of some of the main differences

3. cont....
● Row keys are UTF-8 strings
● No support for data types, values are treated as
opaque byte sequences
● No support for joins
● No support for transactions

4. Physical Layout
● A relational database assumes that each column
defined in the table schema will have a value for
each row that is present in the table.
● NULL values are usually represented with a special
marker (e.g. N).
● The primary key and column identifier are implicitly
associated with each cell based on its physical
position within the layout.

5. Cont...
● The following diagram illustrates how a relational
database table might be laid out on disk.

6. Cont...
● Hypertable (and Bigtable) takes its design from the Log Structured
Merge Tree.
● It flattens out the table structure into a sorted list of key/value
pairs, each one representing a cell in the table.
● The key includes the full row and column identifier, which means
each cell is provided complete addressing information.
● Cells that are NULL are simply not included in the list which
makes this design particularly well-suited for sparse data.

7. Cont...
● The following diagram illustrates how Hypertable
stores table data on-disk.