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Brendan McAdams10gen, Inc.

brendan@10gen.com@rit

The Care & Feeding of Software

Tuesday, November 27, 12

Open Source Scales

25,000

50,000

75,000

100,000

125,000

150,000

May ‘10Jul ‘10Sep ‘10Nov ‘10

Jan ‘11Mar ‘11

May ‘11Jul ‘11

Sep ‘11Nov ‘11

Jan ‘12Mar ‘12

"In short, software is eating the world."- Marc Andreesen Wall Street Journal, Aug. 2011 http://on.wsj.com/XLwnmo

Software is Eating the World

• Amazon.com (and .uk, .es, etc) started as a bookstore• Today, they sell just about everything - bicycles, appliances, computers, TVs, etc.• In some cities in America, they even do home grocery delivery• No longer as much of a physical goods company - becoming fixated and surrounded by software• Pioneering the eBook revolution with Kindle• EC2 is running a huge percentage of the public internet

• Netflix started as a company to deliver DVDs to the home...

• Netflix started as a company to deliver DVDs to the home...• But as they’ve grown, business has shifted to an online streaming service• They are now rolling out rapidly in many countries including Ireland, the UK, Canada and the Nordics• No need for physical inventory or postal distribution ... just servers and digital copies

Disney Found Itself Forced To Transform...

From This...

Disney Found Itself Forced To Transform...

... To This

But What Does All This Software Do?

• Software always eats data – be it text files, user form input, emails, etc

• All things that eat, must eventually excrete...

Ingestion = Excretion

Yeast Ingests Sugars,

and Excretes Ethanol

Ingestion = Excretion

Cows, er...

well, you get the point.

So What Does Software Eat?

• Software always eats data – be it text files, user form input, emails, etc

• But what does software excrete?• More Data, of course...• This data gets bigger and bigger• The solutions become narrower for storing & processing this data• Data Fertilizes Software, in an endless cycle...

Feed & Cultivate Your Software

• If we think of Software & Data this way, cultivation, care & feeding become crucial

• The way we cultivate good software and data?• Good Practices• Good Skills• Hard Work

Don’t Tilt At Windmills...

... Or Shave Too Many Yaks

Don’t Tilt At Windmills...

• It is easy to get distracted in today’s environment

• Keep it simple• Use tools you (and your team) can understand• Use tools and techniques that can scale• Try not to reinvent the wheel

... And Definitely Don’t Bite Off More Than You Can Chew

• Break work into smaller pieces• You can’t fit a whole pig into your mouth... • ... slice it into small parts that you can consume.

My Beginning...

Learn. Constantly.

Would You Go To a Doctor Who

Doesn’t Learn New Things?

Lack of Planning != Agile

Let’s Remember The Rules

This Includes Default Settings

https://jeffpeachey.wordpress.com/2010/07/19/measure-twice-cut-once/

The Rule is “Measure Twice, Cut Once”

Lead From The Front

Community Matters

Eat Your Own Dog Food

• 15 years as a developer taught me this: “Tests seem like a really good idea... I’m tired of fixing my broken crap in production”

for (i <- 1 to ∞) println(“Tests. Matter.”)

Eating Your Own Dog Food

Bugs... and how to avoid them.

Continuous Integration Testing

Learn To Relax

¿QUESTIONS?

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