in Go Artsiom Bukhautsou Senior Backend Engineer @Nord SecurityFan-out 🌱 Pipeline 🤔 Fan-in, Fan-out, Pipeline 🦾 Agenda Fan-in 🌱 Tee 🌱 1. 2. 3. 4. 5.Why learn these patterns?Fan-inFan-in (Example)Fan-in, Fan-out, PipelineFan-in, Fan-out, Pipeline Pros - Maximized throughput - Scalable architecture Cons - System complexity Use cases - ETL processes - Multimedia processingFan-in, Fan-out, Pipeline

Kernel bypass when receiving data from the exchange (or other low-latency signals) - Dispatch / fan-out to processes on the same serverUserspace Networking 66 • Solarflare – industry standard low-latency readers don’t affect the writer # Consumers? Many Message Size? Variable length Dispatch? Fan-out Type Support?82 Concurrent Queues Bounded? Yes – simpler & faster Blocking? No – readers don’t don’t affect the writer # Consumers? Many Message Size? Variable length Dispatch? Fan-out Type Support? PODsPrinciple #7: “Choose the right tool for the right task” 83 Source: ChatGPT84 FastQueue

[new] 试试写个 append()？ 2020 © Changkun Ou · Go 夜读 · Go 2 Generics? A (P)review Example 5: Fan-in Fan-out 30 1 // generic fan-in -- by changkun 2 func Fanin(type T)(ins ...<-chan T) <-chan T { 3 buf 17 wg.Wait() 18 close(out) 19 }() 20 return out 21 } [new] 1 // generic fan-out -- by changkun 2 func Fanout(type T)(r func(max int) int, in <-chan T, outs ...chan T) { 3

Managing Deadlines, Cancellation, and Timeouts" 7. "Advanced Channel Patterns in Go: Pipeline, Fan-Out, and Fan-In" 8. "Understanding Go's Package Structure and Module System" 9. "Effective Use of Reflection

choose to send messages to consumers in a round-robin fashion 10 Communication patterns (II) Fan-out Several logical consumers (possibly implemented by several parallel physical processes) can subscribe

and iteration over channels Building channel producers Pipelines Prime numbers with pipeline Fan-out Fan-in Buffered channels Channels are fair Ticker channels Deferred values provide a convenient arbitrary suspension, unlike produce , which is fully asynchronous. Prime numbers with pipeline Fan-out 261 Multiple coroutines may receive from the same channel, distributing work between themselves doing. Also, pay attention to how we explicitly iterate over channel with for loop to perform fan-out in launchProcessor code. Unlike consumeEach , this for loop pattern is perfectly safe to use from

and iteration over channels Building channel producers Pipelines Prime numbers with pipeline Fan-out Fan-in Bu�ered channels Channels are fair Ticker channels Deferred values provide a convenient have several processor coroutines. In this example, they just print their id and received number: Fan-out 493 fun CoroutineScope.launchProcessor(id: Int, channel: ReceiveChannel) = launch { for doing. Also, pay attention to how we explicitly iterate over channel with for loop to perform fan-out in launchProcessor code. Unlike consumeEach , this for loop pattern is perfectly safe to use

and iteration over channels Building channel producers Pipelines Prime numbers with pipeline Fan-out Fan-in Buffered channels Channels are fair Ticker channels Coroutine exceptions handling Exception because they do not allow arbitrary suspension, unlike produce, which is fully asynchronous. Fan-out Multiple coroutines may receive from the same channel, distributing work between themselves. Let are doing. Also, pay attention to how we explicitly iterate over channel with for loop to perform fan-out in launchProcessor code. Unlike consumeEach, this for loop pattern is perfectly safe to use from

last example, we can find that, with the help of aggregators, it is easy to implement fan-in and fan-out for the number of workers for a specified module. In fact, we can use a simple channel to replace

RISC-V rotaciona os bits nos operandos imediatos a partir de um posicionamento natural para reduzir o fan-out do sinal de instrução e o custo de multiplexação imediato por quase um fator de dois, o que simplifica