Reading “The Practice of Cloud System Administration”

In distributed systems, failure is normal. Hardware failures that are rare, when multiplied by thousands of machines, become common. Therefore failures are assumed, designs work around them, and software anticipates them. Failure is an expected part of the landscape.
— Thomas A. Limoncelli, Strata R. Chalup, Christina J. Hogan, “The Practice of Cloud System Administration”

Reading “The Practice of Cloud System Administration”

It is human nature to look for patterns and to assign them meaning when we find them. Kahneman and Tversky analyzed many of the shortcuts we employ in assessing patterns in data and in making judgments in the face of uncertainty. They dubbed those shortcuts heuristics. In general, heuristics are useful, but just as our manner of processing optical information sometimes leads to optical illusions, so heuristics sometimes lead to systematic error. Kahneman and Tversky called such errors biases. We all use heuristics, and we all suffer from biases. But although optical illusions seldom have much relevance in our everyday world, cognitive biases play an important role in human decision making. And so in the late twentieth century a movement sprang up to study how randomness is perceived by the human mind. Researchers concluded that “people have a very poor conception of randomness; they do not recognize it when they see it and they cannot produce it when they try,” and what’s worse, we routinely misjudge the role of chance in our lives and make decisions that are demonstrably misaligned with our own best interests.
— Thomas A. Limoncelli, Strata R. Chalup, Christina J. Hogan, “The Practice of Cloud System Administration”

Reading “The Practice of Cloud System Administration”

To manage a large distributed system, one must have visibility into the system. The ability to examine internal state—called introspection—is required to operate, debug, tune, and repair large systems.
— Thomas A. Limoncelli, Strata R. Chalup, Christina J. Hogan, “The Practice of Cloud System Administration”

Reading “The Practice of Cloud System Administration”

A typical response to a risky process is to do it as rarely as possible. Thus there is a temptation to do as few releases as possible. The result is “mega-releases” launched only a few times a year. However, by batching up so many changes at once, we actually create more risk. How can we be sure thousands of changes, released simultaneously, will all work on the first try? We can’t. Therefore we become even more recalcitrant toward and fearful of making changes. Soon change becomes nearly impossible and innovation comes to a halt.
— Thomas A. Limoncelli, Strata R. Chalup, Christina J. Hogan, “The Practice of Cloud System Administration”

Seven Habits Reread

Correct maps will infinitely impact our personal and interpersonal effectiveness far more than any amount of effort expended on changing our attitudes and behaviors.
— Steven Covey, “Seven Habits of Highly Effective People”

Seven Habits Reread

In the last analysis, what we are communicates far more eloquently than anything we say or do. We all know it. There are people we trust absolutely because we know their character. Whether they’re eloquent or not, whether they have the human relations techniques or not, we trust them, and we work successfully with them.
— Steven Covey, “Seven Habits of Highly Effective People”

Hi! I’m posting this from TechGirlz and Comcast’s class at Constitution High !!!

Hello everyone!

I’m here at Constitution High School with a terrific class of students learning WordPress with TechGirlz and Comcast.

No matter what you think about Eminent Domain, this sounds wrong

Adam Lang is Philadelphian who has spent years becoming part of a neighborhood, rehabbing his house, investing in the future of his community, is facing a notice that his home is going to get seized for a redevelopment plan. Read his story.

Howard Hall: “All I need to know I learned in Karaoke”

I know quite a few folks who make it a thing to go out to Karaoke more than a few times a year. My good friend Howard Hall (whose birthday is today – Happy Birthday Howard!), posted some thoughts on Karaoke  on a lesson it has for all of us.

Profile of Mark Horvath, creating an online home for the stories of the homeless

Philantropy.com: “After Living on the Streets, a Nonprofit Leader Seeks to Give the Homeless a Voice”.

Check out Mark Horvath’s Invisible People.