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WhiteDB is a lightweight database library operating fully in main memory.
Disk is used only for dumping/restoring database and logging.
Data is persistantly kept in the shared memory area: it is available simultaneously
to all processes and is kept intact even if no processes are currently using the
database.
WhiteDB has no server process. Data is read and written directly from/to memory,
no sockets are used between WhiteDB and the application using WhiteDB.
WhiteDB keeps data as N-tuples: each database record is a tuple of N elements.
Each element (record field) may have an arbitrary type amongst the types provided
by WhiteDB. Each record field contains exactly one integer (4 bytes or 8 bytes).
Datatypes which cannot be fit into one integer are allocated separately
and the record field contains an (encoded) pointer to the real data.
WhiteDB is written in pure C in a portable manner and should compile and function
without additional porting at least under Linux (gcc) and Windows
(native Windows C compiler cl). It has Python and experimental Java bindings.
WhiteDB has several goals:
speed
portability
small footprint and low memory usage
usability as an rdf database
usability as an extended rdf database, xml database and outside these scopes
seamless integration with the Gandalf rule engine (work in progress)
See https://whitedb.org for up-to-date documentation and other information.
This distribution also includes various documentation:
Doc/Install.txt - the installation instructions
Doc/Tutorial.txt - getting started with the database
Doc/Manual.txt - full C API documentation
Doc/Utilities.txt - command line utilities and other programs
Doc/python.txt - Python API documentation
WhiteDB is licenced under GPL version 3.
Note
if you’re looking for release packages, please don’t use the ones Github
generates automatically. Get them from https://whitedb.org/download.html
instead.