maiyang yangwenmai

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

Why I Recommend to Avoid Using the `go-kit` Library

There is a trending 'microservice' library called go-kit. I've been using the go-kit library for a while now. The library provide a lot of convenience integrations that you might need in your service: with service discovery with Consul, distributed tracing with Zipkin, for example, and nice logic utilities such as round robin client side load balancing, and circuit breaking. It is also providing a way to implement communication layer, with support of RPC and REST.

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

linux查看httpd进程数

ps -ef | grep httpd | wc -l

查看Apache的并发请求数及其TCP连接状态

netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

	go test -run=. -bench=. -benchtime=5s -count 5 -benchmem -cpuprofile=cpu.out -memprofile=mem.out -trace=trace.out ./package \| tee bench.txt
	go tool pprof -http :8080 cpu.out
	go tool pprof -http :8081 mem.out
	go tool trace trace.out

	go tool pprof $FILENAME.test cpu.out
	# (pprof) list <func name>

	# go get -u golang.org/x/perf/cmd/benchstat
	benchstat bench.txt

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	#!/bin/bash

	if [ -z "$1" ]; then
	echo "Usage: git pr [clean] [<remote>] <id-or-url>"
	echo ""
	echo "Examples:"
	echo "git pr 42 --> git fetch origin pull/42/head:pr/origin/42"
	echo "git pr upstream 42 --> git fetch upstream pull/42/head:pr/upstream/42"
	echo "git pr https://github.com/peerigon/phridge/pull/1 --> git fetch https://github.com/peerigon/phridge.git pull/1/head:pr/peerigon/phridge/1"
	echo "git pr clean --> Deletes all branches that match pr// and pr///*"

	//
	// _oo0oo_
	// o8888888o
	// 88" . "88
	// (\| -_- \|)
	// 0\ = /0
	// ___/`---'\___
	// .' \\\| \|// '.
	// / \\\|\|\| : \|\|\|// \
	// / _\|\|\|\|\| -:- \|\|\|\|\|- \


	git log --author="Linus Torvalds" --date=iso \| perl -nalE 'if (/^Date:\s+[\d-]{10}\s(\d{2})/) { say $1+0 }' \| sort \| uniq -c\|perl -MList::Util=max -nalE '$h{$F[1]} = $F[0]; }{ $m = max values %h; foreach (0..23) { $h{$_} = 0 if not exists $h{$_} } foreach (sort {$a <=> $b } keys %h) { say sprintf "%02d - %4d %s", $_, $h{$_}, ""x ($h{$_} / $m 50); }'