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box Client [line.radius=3, line.corner=bevel, line.width=2];
space;
box Processing [fill.color=aqua+80, line.radius=5] {
chart signalling <<<
background.color=none;
hscale=auto;
Server, LB [show=no], Backend1, Backend2;
->Server;
show LB;
Server->LB;
LB->Backend2;
hide LB;
Backend2--Backend2:Proc;
join <->:external\nreq;
Server<-Backend2;
<-Server;
>>>;
};
space;
box zone: zone nw [line.type=dotted] {
*def.db db [size=40, line.width=2, middle=Client];
*def.db [size=40, line.width=2];
}
below +30 *def.actor op [size=20, color=orange];
below -10 text: \-Operator;
Client<=>Processing<=>db;
op=>zone: config [label.pos=middle];
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