It depends on what kind of application you are building. Create a representative test scenario, and start hammering away. Then you will know the definitive answer. Besides your use case, it also depends on CPU, memory, front-side bus, operating system, cache settings, etcetera. Seriously, just test your own scenario. If you need some numbers (that … Read more
C/C++ http://sphia.org/ a Key/Value Store, Written in C and BSD-Licensed. https://code.google.com/p/leveldb/ Written in C++, also BSD-Licensed http://luxio.sourceforge.net/ Written in C++, LGPL, faster than Berkeley DB http://symas.com/mdb/ Written in C, License is OpenLDAP Public License (BSD-Like) https://github.com/davidar/sdbm Written in C, Public Domain, Reimplementation of “ndbm” http://repetae.net/computer/vsdb/ Written in C, License unknown, Experimental https://github.com/stevedekorte/skipdb Written in C, … Read more
I participated in the beta evaluation of the BDB SQLite code and one of the things I tried to get a handle on was the performance difference. At this point, I cannot publish exactly what I found until I have at least one other person evaluate my code, run the tests, and confirm the numbers … Read more
Because Subversion’s repository format is entirely internal, they are free to change the representation from one revision to the next. I believe the current revision generally stores reverse deltas (your option 2), but also stores complete snapshots periodically so it doesn’t have to resolve 1000 diffs before returning a result. The Subversion 1.6 release notes … Read more
Use the db_dump program. It is contained in the package core/db (Arch), db-util (Debian, Ubuntu), sys-libs/db (Gentoo, note that here the binary is called db4.8_dump or whatever version you are using). On some systems the man pages are not installed, in that case the documentation can be found here. By default, db_dump outputs some hex … Read more
Have a look at <REPO>/db/format. After upgrading to 1.5 format, my format file shows: 3 layout sharded 1000 Before it used to be: 2