Tdb is a Trivial Database. In concept, it is very much like GDBM, and BSD's DB except that it allows multiple simultaneous writers and uses locking internally to keep writers from trampling on each other. TDB is also extremely small.
Author: Anton Blanchard <antonb [at] users [dot] sourceforge [dot] net>
Maintainer: Rene Rebe <rene [at] t2-project [dot] org>
Remark: Does cross compile (as setup and patched in T2).
Build time (on reference hardware): 10% (relative to binutils)2
Installed size (on reference hardware): 0.13 MB, 33 files
Installed files (on reference hardware): n.a.
2) Compatible with Linux From Scratch's "Standard Build Unit" (SBU).