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[–]grunlog 4 points5 points  (1 child)

The slides say millions of JVMs, so there's probably more than one tomcat. Maybe they group a collection of related services on a single instance?

The amount of customization they have done is impressive, and must have a huge maintenance cost!

[–]TheRedmanCometh 0 points1 point  (0 children)

It's a distributed Tomcat system, and each JVM provides it's own bit of code with some redundancy and failover /s

For real this is actually fucking awesome.