Propose to YARN

[mrbig]

Hi,

here I propose that you add Apache YARN into the list. In my point of view it's more-on-less a standalone component, but a very fundamental one. Understanding what it does could be crucial in understanding the ecosystem.

And there are a lot's of references to it in the descriptions :)

[javiroman]

For sure, I'm working in a new table with a more accurate classification. Many thanks!