PubNub ❤ D3

D3 Bubble Chart with PubNub Data Stream!

data center:

Select a data center location:

So what does this chart indicates? It shows message volume per country from an each PubNub data center.
The size of each bubble corresponds with volume. To simplify the tutorial, the country names are not labeled, however, you can take a look at the generated source code in dev console to see abbriviated country codes as class name!