dnspod_sr.dot

/**
 * dnspod-sr architecture
 * Date: Fri Jan 23 22:44:47 2015 +0800 
 * Author: Yecheng Fu <cofyc.jackson@gmail.com> 
 */
digraph G {
    // graph
    labelloc="t"
    splines=true
    label="dnspod-sr architecture"
    dpi = 100
    rankdir = LR
    node [
        shape=record
    ]
    // nodes
    clients -> sentinel [label="query (udp/tcp)"]
    subgraph cluster_0 {
        label = "dnspod-sr"
        color = blue
        sentinel -> fetchers [label="fetcher queue", style=dotted]
        fetchers [
            shape = record
            label = "{fetchers | {fetcher 0 | fetcher 1 | ... }}"
        ]
        fetchers -> quizzers [label="query queue", style=dotted]
        fetchers -> memory [label="fetch"]
        quizzers -> memory [label="store"]
        memory [
            label = "{datasets|ttl list} | memory"
            color = green
        ]
        { rank=same; fetchers; memory; }
    }
    clients [
    ]
    fetchers -> clients [
        label="response (udp/tcp) if hits in memory"
        constraint=false
    ]
    quizzers [
        label = "{quizzers | {quizzer 0 | quizzer 1 | ... }}"
    ]
    quizzers -> clients [
        label="response (udp/tcp)"
        constraint=false
    ]
    quizzers -> roots [
        dir=both
    ]
}