dqlite 
dqlite is a C library that implements an embeddable and replicated SQL database
engine with high-availability and automatic failover.
The acronym "dqlite" stands for "distributed SQLite", meaning that dqlite extends
SQLite with a network protocol that can connect together
various instances of your application and have them act as a highly-available
cluster, with no dependency on external databases.
Design higlights
- Asynchronous single-threaded implementation using libuv
as event loop.
- Custom wire protocol optimized for SQLite primitives and data types.
- Data replication based on the Raft algorithm and its
efficient C-raft implementation.
Licence
The dqlite library is released under a slightly modified version of LGPLv3, that
includes a copyright exception letting users to statically link the library code
in their project and release the final work under their own terms. See the full
license text.
Try it
The simplest way to see dqlite in action is to use the demo program that comes
with the Go dqlite bindings. Please see the relevant
documentation in that project.
Wire protocol
If you wish to write a client, please refer to the wire protocol
documentation.
Install
If you are on a Debian-based system, you can the latest stable release from
dqlite's stable PPA:
sudo add-apt-repository ppa:dqlite/stable
sudo apt-get update
sudo apt-get install libdqlite-dev
Build
To build libdqlite from source you'll need:
Your distribution should already provide you a pre-built libuv shared
library.
To build the other libraries:
git clone --depth 100 https://github.com/canonical/sqlite.git
cd sqlite
./configure --enable-replication
make
sudo make install
cd ..
git clone https://github.com/canonical/libco.git
cd libco
make
sudo make install
cd ..
git clone https://github.com/canonical/raft.git
cd raft
autoreconf -i
./configure
make
sudo make install
cd ..
Once all required libraries are installed, to in order to build the dqlite
shared library itself you can run:
autoreconf -i
./configure
make
sudo make install
