##Arbitrary text 2
##arbitrary text
C: Client;
S: Server;
B: Backend;
->C: Hit;
C=>S: Request;
S>>B: Query;
text at B: The backend is 
           very busy here.;
S<<B: Response;
C<=S: Reply;
text at C+: The client now
            finishes.;
C->S [weak]: Next Request;

	