-
Notifications
You must be signed in to change notification settings - Fork 147
/
Copy pathstructured-streaming-internals.html
172 lines (153 loc) · 8.05 KB
/
structured-streaming-internals.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
<!doctype html>
<!-- Inspired by view-source:https://brookewenig.github.io/SparkOverview.html -->
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<meta name="description" content="Apache Spark 2 Workshop | Structured Streaming | Internals">
<meta name="author" content="Jacek Laskowski">
<title>Apache Spark 2 Workshop | Structured Streaming | Internals</title>
<link rel="stylesheet" href="reveal.js/css/reveal.css">
<link rel="stylesheet" href="revealjs-css/jacek.css">
<link rel="stylesheet" href="reveal.js/css/theme/beige.css">
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="reveal.js/lib/css/zenburn.css">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'reveal.js/css/print/pdf.css' : 'reveal.js/css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
</head>
<body>
<div class="reveal">
<div class="slides">
<section class="intro" data-transition="zoom" id="home">
<span class="menu-title" style="display: none">Home</span>
<p>
<img width="5%" style="background:none; border:none; box-shadow:none;" data-src="images/scala-logo.png">
<img width="17%" style="background:none; border:none; box-shadow:none;" data-src="images/spark-logo.png">
<img width="8%" src="images/jacek_laskowski_20141201_512px.png" style="border: 0">
</p>
<h1 style="font-size: 2.44em;">Structured Streaming</h1>
<h1 style="font-size: 3.55em;">Internals</h1>
<h3>Apache Spark 2.2</h3>
<h4><a href="https://twitter.com/jaceklaskowski">@jaceklaskowski</a> / <a href="http://stackoverflow.com/users/1305344/jacek-laskowski">StackOverflow</a> / <a href="https://github.com/jaceklaskowski">GitHub</a><br />
Books: <a href="http://bit.ly/mastering-apache-spark">Mastering Apache Spark</a> / <a href="http://bit.ly/spark-structured-streaming">Spark Structured Streaming</a></h4>
<footer style="font-size: small;">©<a href="https://medium.com/@jaceklaskowski">Jacek Laskowski</a> 2017 / @jaceklaskowski / [email protected]</footer>
</section>
<section>
<section id="StreamExecution">
<div style="text-align: left">
<h2>StreamExecution <small>(1 of 4)</small></h2>
<hr>
<p><i class="fa fa-arrow-circle-right success"></i>
<b>StreamExecution</b> — execution environment of a single continuous query (aka <b>streaming Dataset</b>)</p>
<p><i class="fa fa-arrow-circle-right success"></i>
StreamExecution has multiple streaming <b>sources</b> but only one streaming <b>sink</b></p>
<p><i class="fa fa-arrow-circle-right success"></i>
Executes every <b>trigger</b> and adds results to the <b>sink</b></p>
<p><i class="fa fa-arrow-circle-right success"></i>
Created exclusively when <b>DataStreamWriter</b> is started.</p>
</div>
<footer style="font-size: small;">©Jacek Laskowski 2017 / @jaceklaskowski / [email protected]</footer>
</section>
<section>
<div style="text-align: left">
<h2>StreamExecution <small>(2 of 4)</small></h2>
<hr>
<div style="text-align: left">
<p><i class="fa fa-arrow-circle-right success"></i>
StreamExecution starts a <b>thread of execution</b> that runs the streaming query continuously and concurrently</p>
</div>
<div style="text-align: center">
<img src="https://jaceklaskowski.gitbooks.io/spark-structured-streaming/images/StreamExecution-start.png">
</div>
</div>
<footer style="font-size: small;">©Jacek Laskowski 2017 / @jaceklaskowski / [email protected]</footer>
</section>
<section>
<div style="text-align: left">
<h2>StreamExecution <small>(3 of 4)</small></h2>
<hr>
<div style="text-align: center">
<img src="https://jaceklaskowski.gitbooks.io/spark-structured-streaming/images/StreamExecution-uniqueSources.png">
</div>
</div>
<footer style="font-size: small;">©Jacek Laskowski 2017 / @jaceklaskowski / [email protected]</footer>
</section>
<section>
<div style="text-align: left">
<h2>StreamExecution <small>(4 of 4)</small></h2>
<hr>
<div style="text-align: left">
<p><i class="fa fa-arrow-circle-right success"></i>
StreamExecution collects <b>duration</b> for the execution units of a streaming batch</p>
<p><i class="fa fa-arrow-circle-right success"></i>
Use <b>StreamingQuery.lastProgress</b> or <b>StreamingQuery.recentProgress</b></p>
</div>
<div style="text-align: center">
<img src="https://jaceklaskowski.gitbooks.io/spark-structured-streaming/images/StreamExecution-durationMs.png">
</div>
</div>
<footer style="font-size: small;">©Jacek Laskowski 2017 / @jaceklaskowski / [email protected]</footer>
</section>
</section>
<section>
<section id="IncrementalExecution">
<div style="text-align: left">
<h2>IncrementalExecution</h2>
<hr>
<p><i class="fa fa-arrow-circle-right success"></i>
<b>IncrementalExecution</b> — QueryExecution of a streaming Dataset</p>
<p><i class="fa fa-arrow-circle-right success"></i>
Created (in <b>queryPlanning</b> Phase) for incremental execution of the logical query plan (every trigger)</p>
</div>
<footer style="font-size: small;">©Jacek Laskowski 2017 / @jaceklaskowski / [email protected]</footer>
</section>
</section>
<section style="text-align: left" data-markdown id="questions">
<script type="text/template">
# Questions?
* Read [Mastering Apache Spark 2](https://bit.ly/mastering-apache-spark)
* [https://bit.ly/mastering-apache-spark](https://bit.ly/mastering-apache-spark)
* Follow [@jaceklaskowski](https://twitter.com/jaceklaskowski) on twitter
* Upvote [my questions and answers on StackOverflow](http://stackoverflow.com/users/1305344/jacek-laskowski)
</script>
</section>
</div>
</div>
<script src="reveal.js/lib/js/head.min.js"></script>
<script src="reveal.js/js/reveal.js"></script>
<script>
// More info about config & dependencies:
// - https://github.com/hakimel/reveal.js#configuration
// - https://github.com/hakimel/reveal.js#dependencies
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
slideNumber: true,
transition: 'slide', // none/fade/slide/convex/concave/zoom
menu: {
markers: true,
openSlideNumber: true
},
dependencies: [
{ src: 'reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'reveal.js/plugin/markdown/marked.js' },
{ src: 'reveal.js/plugin/markdown/markdown.js' },
{ src: 'reveal.js/plugin/zoom-js/zoom.js', async: true },
{ src: 'reveal.js/plugin/notes/notes.js', async: true },
{ src: 'revealjs-plugins/menu/menu.js', async: true },
{ src: 'reveal.js/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }
]
});
</script>
</body>
</html>