ENTRIES TAGGED "ops"

The case for continuous delivery

Building functionality that really delivers the expected customer value

By now, many of us are aware of the wide adoption of continuous delivery within companies that treat software development as a strategic capability that provides competitive advantage. Amazon is on record as making changes to production every 11.6 seconds on average in May of 2011. Facebook releases to production twice a day. Many Google services see releases multiple times a week, and almost everything in Google is developed on mainline. Still, many managers and executives remain unconvinced as to the benefits, and would like to know more about the economic drivers behind CD.

First, let’s define continuous delivery. Martin Fowler provides a comprehensive definition on his website, but here’s my one sentence version: Continuous delivery is a set of principles and practices to reduce the cost, time, and risk of delivering incremental changes to users.

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Why Feedback?

Maintaining a desired behavior

In two previous posts (Part 1 and Part 2) we introduced the idea of feedback control. The basic idea is that we can keep a system (any system!) on track, by constantly monitoring its actual behavior, so that we can apply corrective actions to the system’s input, to “nudge” it back on target, if it ever begins to go astray.

This begs the question: Why should we, as programmers, software engineers, and system administrator care? What’s in it for us?

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Velocity 2011 retrospective

Velocity 2011 retrospective

Resilience engineering and data's role in performance are key trends in web ops.

A number of emerging themes are defining the web operations world, including: resilience engineering, new approaches to failure, and the role data plays in boosting performance.

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Velocity 2011

Velocity 2011

A tribe of web performance and operations pros is pushing the web forward.

As we approach the fourth Velocity conference, here's a look at how the web performance and operations communities came together, what they've done to improve the web experience, and the work that lies ahead.

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The state of speed and the quirks of mobile optimization

The state of speed and the quirks of mobile optimization

Steve Souders on browser wars, site speed, and the HTTP Archive.

In this interview, Google performance evangelist and Velocity co-chair Steve Souders discusses browser competition, the differences between mobile and desktop optimization, and his hopes for the HTTP Archive.

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How resilience engineering applies to the web world

John Allspaw on resilience engineering's role in web development and operations.

Certain high risk industries — aviation, space travel,healthcare — use resilience engineering to investigate failures. Etsy vice president John Allspaw says the same concepts have a place in web engineering.

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How the cloud helps Netflix

How the cloud helps Netflix

Netflix's Adrian Cockcroft on the benefits of a cloud infrastructure.

Netflix moved some of its services into Amazon's cloud last year. In this interview, Netflix cloud architect Adrian Cockcroft says the move was about building a scalable product and paying down technical debt.

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