lua-tinycdb

A binding to the tinycdb library by Michael Tokarev, which is a public domain implementation of Daniel J. Bernstein's Constant Database (cdb). A cdb is a key-value store (much like BDB/gdbm), but it cannot be updated at runtime (only rebuilt). Reading is very fast, and rebuilding is done atomically by building the new database and then renaming. lua-tinycdb includes the tinycdb source so there are no external dependencies.

Features

I include below the list some of the features of the cdb database structure, stolen (and slightly modified) from D.J. Bernstein's cdb page:

• Fast lookups: A successful lookup in a large database normally takes just two disk accesses. An unsuccessful lookup takes only one.
• Low overhead: A database uses 2048 bytes, plus 24 bytes per record, plus the space for keys and data.
• Fast atomic database replacement

Project links

• Home
• Download
• Documentation
• Source

Release history

• lua-tinycdb-0.2 (2008-11-07)
  • documentation
  • db:iter() is now db:pairs(), though for this release iter is available as an alias.
  • bugfix: __tostring on a cdb maker returned no results
  • small internal refactoring
• lua-tinycdb-0.1 (2008-01-23)
  • first public release

See also

• tinycdb
• cdb DJ Bernstein's original implementation
• cdb format specification
• luacdb Taj Khattra's binding to the original cdb library. lua-tinycdb was developed independently.

License

lua-tinycdb is distributed under the MIT license.

Copyright (c) 2008 A.S. Bradbury

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Contact

Author: A.S. Bradbury
Email: [email protected]
Homepage: http://asbradbury.org/