What version of OS X is installed on this drive?

It may occur to some to have a bunch of old disks laying in closets and them suddenly having the need to attach them to a running machine to restore some old data. Or you could have the need to boot up it’s System.

How to know which OS X operating system is installed on that drive? Well, all you have to do is a simple:

more /System/Library/CoreServices/SystemVersion.plist

over the Terminal.app. I’m writing this as a reminder for an eventual future need.

Powering big data at Pinterest

We currently log 20 terabytes of new data each day, and have around 10 petabytes of data in S3. We use Hadoop to process this data, which enables us to put the most relevant and recent content in front of Pinners through features such as Related Pins, Guided Search, and image processing. It also powers thousands of daily metrics and allows us to put every user-facing change through rigorous experimentation and analysis.

In order to build big data applications quickly, we’ve evolved our single cluster Hadoop infrastructure into a ubiquitous self-serving platform.
making Pinterest