Point for today
Monday, February 14, 2011
2:06 PM
The safe operating bounds of the edge nodes of the cloud are based upon: 
how demand changes over time
how quickly you can re-allocate server power to the edge nodes. 
key tool: virtualization. 
Assumptions for today's discussion
Flowless switching between edge nodes. 
Response time P = tserver + tnetwork + tcloud.
tnetwork is just client-to-edge and edge-to client. 
tcloud includes networking inside the cloud. 
Both of these are subject to their own SLAs. 
So we concentrate on keeping tserver within reasonable bounds. 