History[07][04][08][09][10]

Hypertable software was originally developed at the company Zvents before 2008. Doug Judd was a promoter of Hypertable. In January 2009, Baidu, the Chinese language search engine, became a project sponsor. A version 0.9.2.1 was described in a blog in February 2009. Development ended in March 2016.

Checkpoints[11][12]

Hypertable backup by output table data in random order.

Compression[13][14][15]

Over time, the RangeServers will write in-memory CellCaches to on-disk files, called CellStores. CellStores contain a series of sorted blocks of compressed sorted key/value pairs. These blocks are the minimum unit of data transfer from disk. User can choose the compressor used to compress CellStore blocks in each access group. The compressor option includes zlib, lzo, quicklz, snappy, bmz, none. The default compressor is quicklz.

Concurrency Control[16]

The system uses Multi-Version Concurrency Control (MVCC) and by default will auto-assign revision numbers using a timestamp.

Data Model[05]

Hypertable uses a set of related columns known as a column family. Users may supply an optional column qualifier and specify the qualified column as family:qualifier.

Isolation Levels[14]

Timestamp is used internally to provide snapshot isolation for queries.

System Architecture[14]