The watermark analogy
Thursday, February 18, 2010
9:05 AM
The watermark analogy
Think of pending requests as water in a basin. 
Requests flow in by being made. 
Requests flow out by being serviced. 
The top lip of the basin is the SLA.
Key is to keep the basin at a "comfortable state": neither empty nor full. 
The fullness of the basin is called load!