jbarham / cdb

Pure Go implementation of D. J. Bernstein's cdb constant database library.

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cdb

This is a Go package to read and write cdb ("constant database") files.

The cdb file format is a machine-independent format with the following features:

  • 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.
  • No random limits: cdb can handle any database up to 4 gigabytes. There are no other restrictions; records don't even have to fit into memory.

See the original cdb specification and C implementation by D. J. Bernstein at http://cr.yp.to/cdb.html.

Installation

Assuming you have a working Go environment, installation is simply:

go get github.com/jbarham/cdb

The package documentation can be viewed online at https://pkg.go.dev/github.com/jbarham/cdb or on the command line by running go doc github.com/jbarham/cdb.

The included self-test program cdb_test.go illustrates usage of the package.

Utilities

The cdb package includes ports of the programs cdbdump and cdbmake from the original implementation.

About

Pure Go implementation of D. J. Bernstein's cdb constant database library.

License:BSD 2-Clause "Simplified" License


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