Tree-like Constant Database (tcdb)Tree-like Constant Database, or tcdb, is an extension to D. J. Bernstein's cdb file format. tcdb is a hash table that can contain a tree structure whose edges and nodes can be represented as key/value pairs. tcdb is suitable to represent directory structures or sparse matrices. tcdb is also suitable for storing a large number of key/value pairs that have common prefix. Like an original cdb file, a
