A fast database for constant data with memory sharing across processes

CHDB (constant hash database) is a fast key-value database for constant data,
realized by using a memory-mapped file and thus providing the following
- Extremely fast initial load, regardless of the size of the database.
- Only the pages of the file which are actually used are loaded from the disk.
- Once a page is loaded it is shared across multiple processes.
- Loaded pages are cached across multiple requests and even process recycling.
A typical use of CHDB is as a faster alternative to defining many PHP
CHDB is internally implemented as a hash-table using a perfect hashing function,
thus guaranteeing worst case O(1) lookup time.

License: BSD

This package is not maintained, if you would like to take over please go to this page.

Latest releases

Version Release Download
1.0.3 2013-04-07 chdb-1.0.3.tgz
1.0.2 2012-04-18 chdb-1.0.2.tgz
1.0.1 2011-03-19 chdb-1.0.1.tgz
1.0.0 2011-03-10 chdb-1.0.0.tgz
0.2.0 2010-07-21 chdb-0.2.0.tgz
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Version Message
1.0.3 - Use the right variable when adding the library path for CMPH (thanks to Jille Timmermans).
1.0.2 - Fix compilation for PHP 5.4 (thanks to Sebastian Volland).
- Use RuntimeException instead of Exception for runtime errors.
- Generate slightly better error in case of input size of 1.
1.0.1 - Fix bug #22600: possible crash when throwing an exception on 64-bit systems.
- Fix decoding of error messages in some cases.
1.0.0 Bump version number to reflect stable state.
0.2.0 Allow unloading of chdb files.
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