Resilient User ExperiencesMike Brittain ENGINEERING DIRECTOR, ETSY@mikebrittain

Interfaces and user experiencesthat adapt to technical andarchitectural failure.

Consider the followingtwo situations...

http://www.flickr.com/photos/caffeina/2144044776/

http://www.flickr.com/photos/17793901@N00/106331831/

/** * 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;

}

NavigationLogo

Cute Picture

“Something’s wrong,try again...”

Critical path

Every back-end service is anopportunity for failure.

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Are you showing your visitors to the door?

Adverts SLA: !"" 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.”

Product design doesn’t stopat !""# availability.

OpsDev

Product

OpsDev

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Operability reviews andpost-mortems

Operational Mindset

OpsDev Product

Business Priorities

Operational Mindset

OpsDev Product

!"#$ %&$'( )*+ $++*+ ,$-!.",$

This is hard

... but the benefits are great.

Merci!These slides will be available atmikebrittain.com/talks

Say “Hello!”mike@etsy.com

@ mikebrittain

Resilient User Experiences