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working on new page for event streams
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‎content/pages/04-web-development/15-web-design.markdown‎

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@@ -83,6 +83,11 @@ this short list as my absolute favorites that help developers become
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design principles for building user experiences. Highly recommended even
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if just to see how the information is presented.
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* [Building your color palette](https://refactoringui.com/previews/building-your-color-palette/)
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explains why color pickers are not useful for most user interfaces
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and how you should actually go about selecting your color palette
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for a real world application.
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* [How I Work with Color](https://medium.com/@JustinMezzell/how-i-work-with-color-8439c98ae5ed)
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is a fantastic article from a professional designer on how he thinks
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about color and uses it for certain effects in his designs.

‎content/pages/10-working/01-event-streams.markdown‎

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title: Event Streams
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category: page
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slug: event-streams
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sortorder: 1002
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toc: False
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sidebartitle: Event Streams
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meta: An event stream is a log of one or more events.
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Event streams are a log of one or more "things that happen", which are
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usually referred to as events. Event streams are
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conceptually focused around things that happen rather than objects,
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which are the typical storage unit for
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[relational databases](/databases.html).
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Apache Kafka and Gazette are a popular open source implementations of event
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streams. Amazon Web Services' Kinesis and
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[Azure Event-Hubs](https://azure.microsoft.com/en-us/services/event-hubs/)
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are proprietary hosted implementations.
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## How are event streams stored?
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Some applications, such as aggregating millions of sensors, or thousands
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of constantly streaming cameras, throw off large amounts of data. It's
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difficult to process those large volumes of data in traditional data stores,
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so event streams are built off of a simpler data structure: logs.
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Logs are ordered sequences of events and they typically have less constraints
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than a database. Logs can handle the high throughput writes needed to keep
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up with the constant flood of data from the source of an event stream.
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## Event stream resources
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* [What is Apache Kafka?](https://www.youtube.com/watch?v=FKgi3n-FyNU) sounds
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like it just focuses on Kafka but it actually covers the fundamental
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concepts behind event streams and how they fit into
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[microservices](/microservices.html) architectures.
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‎theme/templates/choices/event-streams.html‎

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<h3>What topic do you want to learn next?</h3>
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<div class="row">
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<div class="c4">
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<div class="well select-next">
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{% include "choices/buttons/databases.html" %}
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</div>
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</div>
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<div class="c4">
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<div class="well select-next">
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{% include "choices/buttons/application-dependencies.html" %}
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</div>
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</div>
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<div class="c4">
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<div class="well select-next">
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{% include "choices/buttons/development-environments.html" %}
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</div>
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</div>
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</div>

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