Embedded persistence with LevelDB

LevelDB is an embedded database at Google, and inspired by of Google's proprietary BigTable database. It's a log-structured key-value store purposed for fast read/write access of large datasets.

LevelDB has no command-line or server interface; it's intended for use directly as a library. One of the advantages of an embedded database is that we eliminate peer dependencies-we don't have to assume that a database is available at a certain host and port: we simply require a module and use the database directly.

In this recipe, we're going to implement a quotes application on top of LevelDB.

Getting ready

There's no external database to install-all we need to do is create a folder, with an index.js, initialize it as a package, and install some dependencies:

$ mkdir level-app 
$ cd level-app 
$ touch index.js 
$ npm init -y 
$ npm install --save level xxhash end-of-stream-through2

How to do it...

Let's start by loading our dependencies:

const {hash} = require('xxhash...