Scalability
Monday, February 08, 2010
1:20 PM
Scalability
An application is scalable (in some load attribute) if provisioning N servers allows it to handle N times as much load of that kind.
Watch out: not everything is scalable. 
From the time-space diagram: 
We can keep service computing time down by scaling, but
We cannot reduce the base processing time. 
So
Appengine applications are 
not scalable in processing time per request, but
they are scalable in request volume.  