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Resilient User Experiences
Mike Brittain
ENGINEERING DIRECTOR, ETSY
@mikebrittain
Interfaces and user experiences
that adapt to technical and
architectural failure.
Consider the following
two situations...
Resilient User Experiences
Resilient User Experiences
http://www.flickr.com/photos/caffeina/2144044776/
http://www.flickr.com/photos/17793901@N00/106331831/
Resilient User Experiences
/**
* Creates a database connection.
*/
public function __construct($host, $user, $pass, $db) {
parent::__construct($host, $user, $pass, $db);
if (mysqli_connect_error()) {
throw new DBConnection_Exception(
sprintf("Error: %s, %s",
mysqli_connect_errno(),
mysqli_connect_error()));
}
}
try {
$conn = new DBConnection('viewsdb.host', 'db_read_user',
'ssssshh!', 'views_db');
} catch (DBConnection_Exception $e) {
// TODO: Someone should figure out what to do if
// we can't connect to the views db.
throw $e;
}
Resilient User Experiences
Resilient User Experiences
NavigationLogo
Cute Picture
“Something’s wrong,
try again...”
Resilient User Experiences
Critical path
Every back-end service is an
opportunity for failure.
Resilient User Experiences
Resilient User Experiences
Resilient User Experiences
Resilient User Experiences
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Resilient User Experiences
Resilient User Experiences
Resilient User Experiences
Resilient User Experiences
Are you showing your
visitors to the door?
Adverts SLA: 400 ms
Non-blocking Ajax
Google Docs
Google Calendar
GMail
“Oops, we aren’t able to access
click metrics right now, do not
worry — your data is safe.”
Resilient User Experiences
Resilient User Experiences
Product design doesn’t stop
at 100% availability.
OpsDev
Product
OpsDev
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2 3
4
5 6
10
8
9
4
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147
Operability reviews and
post-mortems
Operational Mindset
OpsDev Product
Business Priorities
Operational Mindset
OpsDev Product
page views for error template
This is hard
... but the benefits are great.
Merci!
These slides will be available at
mikebrittain.com/talks
Say “Hello!”
mike@etsy.com
@ mikebrittain
Resilient User Experiences

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Resilient User Experiences