bojand

Just documenting docs, articles, and discussion related to gRPC and load balancing.

https://github.com/grpc/grpc/blob/master/doc/load-balancing.md

Seems gRPC prefers thin client-side load balancing where a client gets a list of connected clients and a load balancing policy from a "load balancer" and then performs client-side load balancing based on the information. However, this could be useful for traditional load banaling approaches in clound deployments.

https://groups.google.com/forum/#!topic/grpc-io/8s7UHY_Q1po

gRPC "works" in AWS. That is, you can run gRPC services on EC2 nodes and have them connect to other nodes, and everything is fine. If you are using AWS for easy access to hardware then all is fine. What doesn't work is ELB (aka CLB), and ALBs. Neither of these support HTTP/2 (h2c) in a way that gRPC needs.

bojand

package main

import (
	"fmt"
	"strings"
)

type Cap struct {
	message string
}

bojand

Microbenchmarks like this should always be taken with a grain of salt; but it's interesting to do a comparison.

Source code for the server implementations

Using:

• Go 1.10.1
• Node 8.11.0
• grpcannon 0.1.0

Node

bojand

#![allow(unused)]

use std::fmt;

#[derive(Copy, Clone)]
pub struct Type<'a> {
    mime_type: &'a str,
}

impl<'a> Type<'a> {

bojand

package main

import (
	"log"
	"sync"
	"time"
)

const tasksPerSecond = 1

bojand

package main

import (
  "bytes"
  "fmt"
  "io"
  "reflect"
)

func do(w io.Writer) {

bojand

func TestRunReflection(t *testing.T) {
  var cc *grpc.ClientConn
	var opts []grpc.DialOption
	var mtd *desc.MethodDescriptor

	opts = append(opts, grpc.WithInsecure())

	dialCtx := context.Background()
	cc, err = grpc.DialContext(dialCtx, "host", opts...)
	if err != nil {

bojand

package main

import (
	"fmt"
	"time"
)

type Config struct {
	Secure  bool
	Timeout time.Duration

bojand

https://peter.bourgon.org/go-for-industrial-programming/

Futures

future := make(chan int, 1)
go func() { future <- process() }()
result := <- future

bojand

package main

import (
	"fmt"
)

type E struct{}

func (e *E) foo() {
	fmt.Println("E.foo()")