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03_parallel-pipeline.js
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03_parallel-pipeline.js
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// http://zguide.zeromq.org/page:all#header-15
// supercomputer architecture
const nano = require('nanomsg')
const addr1 = 'tcp://127.0.0.1:5556'
const addr2 = 'tcp://127.0.0.1:5557'
sink()
var i = 0
while (i < 100) {
worker(i)
i++
}
setTimeout(function () {
ventilator()
}, 5000)
// create a data creator
function ventilator () {
// send 100 tasks
var i = 0
var msecTotal = 0
const push = nano.socket('push')
push.bind(addr1)
while (i < 100) {
var workload = Math.abs(Math.round(Math.random() * 100)) + 1
msecTotal += workload
push.send(workload.toString())
i += 1
}
console.log('Total expected:', msecTotal, 'msec')
}
// create a data transform
function worker (num) {
const pull = nano.socket('pull')
pull.connect(addr1)
pull.on('data', function (data) {
const push = nano.socket('push')
push.bind(addr2)
push.send(String(data))
})
}
// create a data aggregator
function sink () {
var i = 0
var start = Date.now()
const pull = nano.socket('pull')
pull.connect(addr2)
pull.on('data', function (data) {
console.log('data', String(data))
i += 1
process.stdout.write(i % 10 === 0 ? ':' : '.')
if (i === 100) {
console.log('closed')
pull.close()
const elapsed = Date.now - start
console.log('Total elapsed: ' + elapsed)
}
})
}