Twice already this year a friend has tipped me about Linux Format (the magazine; different friend each time). I have Christmas 2014 and now I guess I gotta get February 2015.
James Trumbull reaps good press this go-round, pushing his book like an author on Letterman. (Matt Hanson starring as DL in this episode.) Containers are cool. I'm a purist, so I'm slow to use them. But I have used them. Most of the interview is good info. A few objections worth noting:
+ dismissing Unix is wrong (tho GKH, Mayer, MacMillan, Poettering, Walsh, Smalley, and even Sievers are doing that full throttle)
+ AS/400 is not a mainframe, neither is a VAX
+ virtual machines can be spun up as fast as containers
I also have to question the numbers cited from IBM. Insertion loss for my favorite hypervisor is way less than 20 or 10%. It's easily under 5% and has been shown to improve guest performance above unity for some cases. We're talking about different kinds of hardware, and Trumbull wasn't clear which hardware IBM's numbers relate to.
Don't get me wrong. Zones, jails, and containers are all great for a lot of workloads. And James makes it clear that they're not virtual machines.
The Docker playing field is slanted steeply in favor of one company. You don't hear that in the buzz. It's not illegal, not even unethical or imoral, but it does go against the grain of "community aspect". The rest of the containers world is not so unbalanced.
-- R; <><