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index.html
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<!DOCTYPE html>
<html>
<head>
<title>gun - the open source, real-time, fully decentralized, offline-first, graph database</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.3/jquery.easing.min.js"></script>
</head>
<body>
<style>
@import url(https://fonts.googleapis.com/css?family=Dosis|Poiret+One|Oxygen);
html, body {
margin: 0;
padding: 0;
height: 100%;
font-family: 'Oxygen', Candara, Calibri, Segoe, "Segoe UI", Optima, Arial, sans-serif;
}
.center {
text-align: center;
}
.lean {
font-family: 'Poiret One', Candara, Calibri, Segoe, "Segoe UI", Optima, Arial, sans-serif;
}
.clean {
font-family: 'Dosis', Candara, Calibri, Segoe, "Segoe UI", Optima, Arial, sans-serif;
}
.crisp {
font-family: 'Oxygen', Candara, Calibri, Segoe, "Segoe UI", Optima, Arial, sans-serif;
}
.svg {
background: white url('./web/img/devices.svg') no-repeat 50% 50%;
height: 40em;
}
.GUN {
background: transparent url('./web/img/gun.svg') no-repeat 50% 50%;
background-size: 60%;
}
.dull {
background-color: #EEE;
-webkit-transition: background-color 600ms linear;
-moz-transition: background-color 600ms linear;
transition: background-color 600ms linear;
}
.blue {
background-color: skyblue;
-webkit-transition: background-color 600ms linear;
-moz-transition: background-color 600ms linear;
transition: background-color 600ms linear;
}
.red {
background-color: red;
-webkit-transition: background-color 600ms linear;
-moz-transition: background-color 600ms linear;
transition: background-color 600ms linear;
}
.green {
background-color: MediumSpringGreen;
-webkit-transition: background-color 600ms linear;
-moz-transition: background-color 600ms linear;
transition: background-color 600ms linear;
}
.fold {
width: 100%;
position: relative;
overflow: hidden;
}
.behold {
margin-top: 8%;
padding:0;
text-align: center;
}
.grid {
display: inline-block;
}
@media (max-width: 760px) {
body {
font-size: 8pt;
}
}
@media (max-width: 1279px) {
.wide {
display: none;
}
}
.screen {
position: relative;
overflow: hidden;
}
.mouse {
display: block;
position: absolute;
top: 60%;
left: -6%;
}
</style>
<div class="fold">
<div class="behold">
<div class="graphic grid" style="min-width: 300px; max-width: 600px; height: 400px; position: relative; margin:0 auto; padding:0;">
<img src="./web/img/server.png" class="server" style="position: absolute; top: 2%; left: 35%; wid-th: 50%;">
<div class="desktop" style="height: 10em; width: 17em; position: absolute; top: 36%; left: 3%;">
<div class="monitor" style="height: 100%; width: 100%; background: #222; padding: .75em; margin-left: -.75em; border-radius: 1em;">
<div class="dull screen GUN" style="height: 100%; width: 100%;">
<img class="mouse" src="./web/img/mouse.png">
</div>
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<div class="stand" style="margin: 1px auto 0px;
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<div class="dull screen GUN" style="height: 100%; width: 100%;">
</div>
</div>
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</div>
</div>
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<div class="case" style="height: 100%; width: 100%; background: #222; padding: .5em .2em; margin-left: -.2em; border-radius: 0.25em;">
<div class="dull screen GUN" style="height: 100%; width: 100%;">
</div>
</div>
</div>
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</div>
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</div>
<div class="larr" style="position: absolute; bottom: -.55em; left: -.59em;
width: 0;
height: 0;
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border-right: 1em solid FireBrick;
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</div>
</div>
<div class="arrow updown laptop-server" style="height: 50px; border: dashed 0px FireBrick; border-radius: 0;
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<div class="uarr" style="position: absolute; top: -1em; left: -.45em;
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</div>
<div class="darr" style="position: absolute; bottom: -1em; left: -.45em;
width: 0;
height: 0;
border-left: .5em solid transparent;
border-right: .5em solid transparent;
border-top: 1em solid FireBrick;">
</div>
</div>
<span style="color: transparent">Distributed embedded graph database engine. The no pain, no cost, no backend, NoDB database, gun.</span>
</div>
<div class="graphic wide grid" style="min-width: 300px; max-width: 600px; height: 400px;
position: relative; margin:0 auto; padding:0;">
<div class="arrow server-server" style="width: 100px; height: 0px; border: dashed 0px FireBrick; border-radius: 0;
position: absolute; left: -9%; top: 15%; border-width: 3px 0px 0px 0px;">
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height: 0;
border-top: .5em solid transparent;
border-right: 1em solid FireBrick;
border-bottom: .5em solid transparent;">
</div>
<div class="larr" style="position: absolute; top: -.59em; right: -.6em;
width: 0;
height: 0;
border-left: 1em solid FireBrick;
border-bottom: .5em solid transparent;
border-top: .5em solid transparent;">
</div>
</div>
<img src="./web/img/server.png" class="server" style="position: absolute; top: 2%; right: 35%;">
<div class="desktop" style="height: 10em; width: 17em; position: absolute; top: 36%; right: 3%;">
<div class="monitor" style="height: 100%; width: 100%; background: #222; padding: .75em; margin-left: -.75em; border-radius: 1em;">
<div class="dull screen GUN" style="height: 100%; width: 100%;">
</div>
</div>
<div class="stand" style="margin: 1px auto 0px;
border-bottom: 2.75em solid #888;
border-left: .5em solid transparent;
border-right: .5em solid transparent;
height: 0;
width: 3.2em;">
</div>
<div class="stand" style="width: 6em; height: .5em; background: #888; margin: 0px auto"></div>
</div>
<div class="laptop" style="height: 7em; width: 12em; position: absolute; top: 60%; right: 48%;">
<div class="lid" style="height: 100%; width: 100%; background: #222; padding: .6em; margin-left: -.6em; border-radius: .6em .6em 0em 0em;">
<div class="dull screen GUN" style="height: 100%; width: 100%;">
</div>
</div>
<div class="case" style="height: .75em; width: 140%; margin-left: -20%; background: #999; border-radius: 0em 0em 5em 5em;">
</div>
</div>
<div class="phone" style="height: 3.75em; width: 2.25em; position: absolute; top: 35%; right: 70%;">
<div class="case" style="height: 100%; width: 100%; background: #222; padding: .5em .2em; margin-left: -.2em; border-radius: 0.25em;">
<div class="dull screen GUN" style="height: 100%; width: 100%;">
</div>
</div>
</div>
<div class="arrow desktop-server" style="width: 52px; height: 52px; border: dashed 0px FireBrick; border-radius: 0 50px 0 0;
position: absolute; right: 20%; top: 15%; border-width: 3px 3px 0px 0px;">
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</div>
</div>
<div class="arrow phone-server" style="width: 26px; height: 52px; border: dashed 0px FireBrick; border-radius: 0 0 0px 50px;
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</div>
<div class="rarr" style="position: absolute; bottom: -.55em; right: -.7em;
width: 0;
height: 0;
border-top: .5em solid transparent;
border-left: 1em solid FireBrick;
border-bottom: .5em solid transparent;">
</div>
</div>
<div class="arrow updown laptop-server" style="height: 50px; border: dashed 0px FireBrick; border-radius: 0;
position: absolute; right: 60%; top: 40%; border-width: 0px 3px 0px 0px;">
<div class="uarr" style="position: absolute; top: -1em; left: -.45em;
width: 0;
height: 0;
border-left: .5em solid transparent;
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border-bottom: 1em solid FireBrick;">
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<div class="darr" style="position: absolute; bottom: -1em; left: -.45em;
width: 0;
height: 0;
border-left: .5em solid transparent;
border-right: .5em solid transparent;
border-top: 1em solid FireBrick;">
</div>
</div>
<span style="color: transparent">Distributed embedded graph database engine. The no pain, no cost, no backend, NoDB database, gun.</span>
</div>
<script>
$(function(){
var c = ['dull', 'blue', 'green']
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$(".screen").click(function(){
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$('.screen').not(this).each(function(){
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setTimeout(function(){
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if(!(--n)){ to = null }
}, rand(400,700));
});
});
function rand(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
});
</script>
<script>
$(function(){
var mouse = $('.mouse');
function show(i){
function to(){
mouse.animate({top: "60%", left: "55%"}, {
duration: 500,
specialEasing: {top: 'easeInQuad', left: 'easeOutQuad'},
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</script>
<div class="center" style="margin: 2% 0;">
<div class="lean" style="font-size: 400%;">Easiest Database Ever</div>
<div class="lean" style="font-size: 225%;">Sync state in a cinch at a distributed system scale.</div>
</div>
</div>
</div> <!-- END FOLD -->
<a href="https://github.com/amark/gun" target="_blank"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/365986a132ccd6a44c23a9169022c0b5c890c387/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f7265645f6161303030302e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png"></a>
<script type="text/javascript">
window.heap=window.heap||[],heap.load=function(t,e){window.heap.appid=t,window.heap.config=e;var a=document.createElement("script");a.type="text/javascript",a.async=!0,a.src=("https:"===document.location.protocol?"https:":"http:")+"//cdn.heapanalytics.com/js/heap-"+t+".js";var n=document.getElementsByTagName("script")[0];n.parentNode.insertBefore(a,n);for(var o=function(t){return function(){heap.push([t].concat(Array.prototype.slice.call(arguments,0)))}},p=["clearEventProperties","identify","setEventProperties","track","unsetEventProperty"],c=0;c<p.length;c++)heap[p[c]]=o(p[c])};
heap.load("2174172773");
</script>
<!--
<div style="margin: 0 auto;">
<blockquote class="twitter-tweet" lang="en"><p lang="en" dir="ltr">With the proliferation of simple apps that sometimes become huge, it's cool to see projects like GunDB happening. <a href="http://t.co/rgTuZ4LbLR">http://t.co/rgTuZ4LbLR</a></p>— Tom Preston-Werner (@mojombo) <a href="https://twitter.com/mojombo/status/571027932048723969">February 26, 2015</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>
</div>
-->
<!-- BEGIN TUTORIAL -->
<div class="tutorial">
<script src="https://gunjs.herokuapp.com/gun.js"></script>
<link id="style" rel="stylesheet" href="https://yandex.st/highlightjs/8.0/styles/ir_black.min.css">
<script src="https://yandex.st/highlightjs/8.0/highlight.min.js"></script>
<style>
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</style>
<div class="main">
<div style="font-size: 18pt; margin: 0 0 .75em;">Try it now</div>
<div class="step show step1">
<div class="full grid">
<div class="middle unit teft">
<pre style="max-width: 30.1em; margin: 0 1em 1em 0;">var gun = Gun('https://gunjs.herokuapp.com/gun');
gun.put({hello: "world"}).key('<span class="your-key">example/tutorial</span>');</pre>
</div>
<div class="middle unit teft" style="min-width: 20em; max-width: 28em; margin-bottom: 1em;">
<a href="#step2"><button class="left" style="margin-right: 1em;"><big>Run!</big></button></a>
In this <b>1 minute</b> tutorial, we will connect to a gun peer, create an object, and sync data in realtime.
</div>
</div>
</div>
<div class="step hide step2">
<div class="full grid">
<div class="middle unit teft">
<pre style="max-width: 30.1em; margin: 0 1em 1em 0;">var ref = gun.get('<span class="your-key">example/tutorial</span>');
ref.on(function(data){
$('body').text(JSON.stringify(data));
});</pre>
</div>
<div class="middle unit teft" style="min-width: 34em; max-width: 28em; margin-bottom: 1em;">
<a href="#step3"><button class="left" style="margin-right: 1em; background: MediumSpringGreen;"><big>Next</big></button></a>
Congratulations! You just made an object and saved a reference to it.
In two tabs, we'll load that key to open a shared reference.
</div>
</div>
</div>
<div class="step hide step3">
<div class="full grid">
<style>
.browser {
background: white;
border-radius: .25em;
width: 250px;
//height: 300px;
color: #222;
margin: .5em;
overflow: hidden;
}
.b-bar {
background: #EEE;
border-radius: .25em .25em 0 0;
}
.b-but {
float: left;
width: 1em;
height: 1em;
}
.browser a {
text-decoration: none;
background: white;
border-radius: .4em;
padding: 0 1em;
color: #555;
}
.browser iframe { border: none; }
</style>
<div class="browser unit teft">
<div class="b-bar">
<div class="b-but">←</div>
<div class="b-but">→</div>
<div class="b-but"><small>↻</small></div>
<small><small><span>
<a href="https://gunjs.herokuapp.com/" target="_blank">https://gunjs.herokuapp.com/</a>
</span></small></small>
<small class="center" style="position: relative; top: -.14em;">x</small>
<span class="center">≡<span>
</div>
<iframe></iframe>
</div>
<div class="browser unit teft">
<div class="b-bar">
<div class="b-but">←</div>
<div class="b-but">→</div>
<div class="b-but"><small>↻</small></div>
<small><small><span>
<a href="https://gunjs.herokuapp.com/" target="_blank">https://gunjs.herokuapp.com/</a>
</span></small></small>
<small class="center" style="position: relative; top: -.14em;">x</small>
<span class="center">≡<span>
</div>
<iframe></iframe>
</div>
</div>
<form action="#step3" onsubmit="return false;">
<style>
.step3 input {
width: 6em;
}
</style>
<div class="grid">
<div class="middle unit teft">
<pre style="max-width: 40em; margin: 0 1em 1em 0;">ref.path('<input id="try-path" value="hello">').put("<input id="try-sync" value="sync">");</pre>
</div>
<div class="middle unit teft" style="min-width: 20em; max-width: 30em; margin-bottom: 1em;">
<button type="submit" class="left" style="margin-right: 1em;"><big>Update!</big></button>
Let's update the "hello" field with a different value.
We can path into any field, and update it directly.
</div>
</div>
</form>
</div>
<script>
$(function(){
var gun, key = "random/" + Gun.text.random(9),
hili = function(){
$("pre").each(function(){
hljs.highlightBlock(this);
})
}
$(".your-key").text(key);
hili();
location.hash = 'step1';
$(window).on('hashchange', function(){
$('.step').removeClass('show').addClass('hide')
$(location.hash.replace('#','.')).addClass('show');
});
$(".step1").find('button').on('click', function(e){
if(gun){ return }
gun = Gun('https://gunjs.herokuapp.com/gun');
gun.put({hello: "world"}).key(key);
});
$(".step2").find('button').on('click', function(e){
$(".browser").find("iframe").attr("src", "./web/tabs.html?key=" + key);
});
$(".step3").find('form').on('submit', function(e){
var val = $("#try-sync").val() || null;
var path = $("#try-path").val();
gun.get(key).path(path).put(val);
});
})
</script>
</div>
</div>
<!-- END TUTORIAL -->
<! OLD BLOG POST HERE -->
<style>
#main {
min-width: 250px;
max-width: 700px;
width: 75%;
margin: 7% auto;
padding: 2% 5%;
background: white;
background: rgba(100%,100%,100%,.6);
font-family: Arial;
font-size: 18pt;
text-shadow: 0px 0px 7px #DDD;
line-height: 20pt;
}
#main p {
text-indent: 2em;
}
</style>
<div id="main">
<h3>The blog that started it all...</h3>
<p>
Gun is a persisted distributed cache, part of a NoDB movement.
It requires zero maintenance and runs on your own infrastructure.
Think of it as <i>"Dropbox for Databases"</i> or a <i>"Self-hosted Firebase"</i>.
This is an early preview, so check out the <a href="https://github.com/amark/gun" target="_blank">github</a> and read on.
</p>
<p>
Everything gets cached, so your users experience lightning fast response times.
Since gun can be embedded anywhere javascript can run,
that cache can optionally be right inside your user's browser using localstorage fallbacks.
Updates are then pushed up to the servers when the network is available.
</p>
<p>
All conflict resolution happens locally in each peer using a deterministic algorithm.
Such that eventual consistency is guaranteed across all writes within the mesh,
with fault tolerant retries built in at each step for at least once deliveries.
Data integrity is now a breeze.
</p>
<p>
Gun also establishes and repairs server to server communication across geographically separated machines,
with just the help of an initial IP from you.
It bridges the distance with a realtime connection,
so updates propagate at the speed of the raw pipes linking them.
However each server is intelligent enough to only subscribe to the necessary subsection of your data set that is in its working memory,
keeping things nimble for its connected users.
</p>
<p>
Data is then persisted to any S3 like service,
allowing you to save a truly webscale amount of "big data" without breaking your wallet.
Consistency across concurrency is achieved at this layer
by each parallel snapshot going through an idempotent transformation that is agreed upon.
The granularity and frequency of these snapshots can be tweaked by you,
easily tailor fitting it to your data needs and budget concerns.
</p>
<p>
<b>In summary,</b> this marks an important progression in web technologies.
Memory is getting cheap enough that we can now front load each connected user's active data
right into the application layer and manipulate it directly.
Networks are fast enough that if we get too many connected users we can just horizontally
redistribute them across different machines.
Conflict resolution algorithms are sophisticated enough to handle things immediately
in the majority of data cases, with the remaining few as transactions performed ontop.
<p>
This is will be a win for both developers and users,
because it makes things easier to build and faster to respond.
We are excited about this and working hard to finish the first release.
</p>
<p>
or join the <a href="http://groups.google.com/forum/#!forum/g-u-n" target="_blank">Google Group</a>.
Plus we're hiring, so contact us!
</p>
<h2>FAQ</h2>
<h4>Why did you build this thing?</h4>
<p>
1. I love databases, especially new ones that keep the working set in memory.
But I was horrified to realize that if I use a Database as a Service (DaaS)
then I would have to rely on a network call to get that data, which is horribly slow.
I wanted something faster, and if possible, cheaper - because they start charging you
outrageous prices if you get past their incredibly tiny free tier.
</p>
<p>
2. Hosting your own database is a pain because you have to maintain the hard drives.
Even the basic setup and configuration is nasty...
having to create a bunch of EBS volumes, attaching them, then mounting, formatting,
MDADM and LVM, striping, mirroring, and keeping fstab from locking on boot.
This is ignoring having to figure out how to resize them.
Even with SSDs you have problems that they are bound to one instance and
you get charged for the total volume size, not the amount used.
</p>
<p>
I wanted something easy, needing no maintenance and be extremely portable
- allowing me to spin up an ephemeral server anywhere, on any cloud,
and my data "just work" there.
</p>
<h4>How are you different from every other database that is trying to reinvent the wheel?</h4>
<p>
1. Because gun is not a database (NoDB), it is a persisted distributed cache.
The fatal flaw with databases is that they assume some centralized authority.
While this may be the case initially when you are small,
it always ceases to be true when you become large enough that concurrency is unavoidable.
No amount of leader election and consensus algorithms can patch this
without facing an unjustified amount of complexity.
Gun resolves all this by biting the bullet -
it solves the hard problems first, not last.
It gets data synchronization and conflict resolution right from the beginning,
so it never has to rely on vulnerable leader election or consensus locking.
</p>
<p>
2. Plus it embeds directly into your application,
so you can do your own custom queries with just pure programming logic.
Meaning you never have to learn some silly separate query language again.
A query language which just attempts to be some DSL to RPC another machine
into doing the same query you could have already written in half the time
it took to learn the query language. Because face it, any sufficiently capable
query language has to be Turing complete, and at that point -
why aren't you just writing your entire application logic in it?
Your app is nothing without your data.
</p>
</div>
<!-- END OLD BLOG POST -->
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