November 2019
Intermediate to advanced
38 pages
52m
English
Content preview from Case Studies in Infrastructure Change Management
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Chapter 2. Case Study 1: Moonshot
In this chapter, we discuss a large-scale project called Moonshot. We share several examples of tools, processes, and techniques that pushed the project forward and conclude with a postmortem of lessons learned from the project.
Overview
In 2010, the senior Storage SRE leadership declared that the Moonshot project would soon be underway. This project required teams to migrate all of the company’s systems from GFS1 to its successor, Colossus, by the end of 2011. At the time, Colossus was still in prototype, and this migration was the largest data migration in the history of Google. This mandate was so ambitious that people dubbed the project Moonshot. As an internal newsletter to engineers put it:
If migrating all of our data in 2010 still sounds like a pretty aggressive schedule, well, yes it is! Will there be problems such as minor outages? Probably. However, the Storage teams and our senior VPs believe that it’s worth the effort and occasional hiccup, and there are plenty of incentives for early adopters, including reduced quota costs, better performance, and lots of friendly SRE support.
The initial communication completely undersold the effort, complexity, and difficulty of this project. In reality, it took a full two years to migrate all of Google’s services from GFS to Colossus.
GFS was designed in 2001 as Google’s first cluster-level file system. It supported many petabytes of storage and allowed thousands of servers to interact ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.