ECP Magic

I saw someone recently refer to ECP as magic. It certainly seems so, and there is a lot of very clever engineering to make it work. But the following sequence of diagrams is a simple view of how data is retrieved and used across a distributed architecture.

For more more on ECP including capacity planning follow this link: Data Platforms and Performance - Part 7 ECP for performance, scalability and availability

To start

  • There are three globals on disk ^A, ^B and ^C.
  • Global ^B equals "B"
  • There is one Data server and two or more Application servers.
  • The diagrams show the cache (global buffers) on each server.


A user on Application server 1 requests the contents of ^B, and the sequence starts, see if you can follow along.
















For more more on ECP including capacity planning follow this link: Data Platforms and Performance - Part 7 ECP for performance, scalability and availability