# Debian systems

## Build Dependency:

libraft-dev    (>= 0.17.0 required)

```
build-essential libsqlite3-dev libuv1-dev pkg-config shellcheck autoconf libtool
```

## Building Script

```
git clone https://github.com/canonical/dqlite

cd dqlite

autoreconf -i
```

Download configure script [configure_debian](../../../raw/branch/main/configure_debian)

```
bash configure_debian

make
```

## Build debian packages (.deb)

Download build script [build-deb](../../../raw/branch/main/build-deb)

```
bash build-deb 
```

dqlite [![CI Tests](https://github.com/canonical/dqlite/actions/workflows/build-and-test.yml/badge.svg)](https://github.com/canonical/dqlite/actions/workflows/build-and-test.yml) [![codecov](https://codecov.io/gh/canonical/dqlite/branch/master/graph/badge.svg)](https://codecov.io/gh/canonical/dqlite)
======

[dqlite](https://dqlite.io) 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](https://sqlite.org/) 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 highlights
----------------

* Asynchronous single-threaded implementation using [libuv](https://libuv.org/)
  as event loop.
* Custom wire protocol optimized for SQLite primitives and data types.
* Data replication based on the [Raft](https://raft.github.io/) algorithm and its
  efficient [C-raft](https://github.com/canonical/raft) implementation.

License
-------

The dqlite library is released under a slightly modified version of LGPLv3, that
includes a copyright exception allowing users to statically link the library code
in their project and release the final work under their own terms. See the full
[license](https://github.com/canonical/dqlite/blob/master/LICENSE) text.

Compatibility
-------------

dqlite runs on Linux and requires a kernel with support for [native async
I/O](https://man7.org/linux/man-pages/man2/io_setup.2.html) (not to be confused
with [POSIX AIO](https://man7.org/linux/man-pages/man7/aio.7.html)), which is
used by the libuv backend of C-raft.

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](https://github.com/canonical/go-dqlite#demo) in that project.

Media
-----

A talk about dqlite was given at FOSDEM 2020, you can watch it
[here](https://fosdem.org/2020/schedule/event/dqlite/).

[Here](https://gcore.com/blog/comparing-litestream-rqlite-dqlite/) is a blog post from 2022 comparing dqlite with rqlite and Litestream, other replication software for SQLite.

Wire protocol
-------------

If you wish to write a client, please refer to the [wire protocol](https://dqlite.io/docs/protocol)
documentation.

-------------
[Source Code](../../../../dqlite)