ernado

CREATE DATABASE `tera_site` CHARACTER SET utf8 COLLATE utf8_general_ci;

ernado

(admin)➜  tera-online.ru git:(master) pip install django-redis==3.5
Downloading/unpacking django-redis==3.5
  Downloading django-redis-3.5.0.tar.gz
  Running setup.py (path:/env/admin/build/django-redis/setup.py) egg_info for package django-redis
    
    warning: no files found matching 'redis_cache/stats/templates/redis_cache/*.html'
    warning: no files found matching 'redis_cache/stats/static/redis_cache/*'
Downloading/unpacking redis>=2.7.0 (from django-redis==3.5)
  Downloading redis-2.10.3.tar.gz (86kB): 86kB downloaded
  Running setup.py (path:/env/admin/build/redis/setup.py) egg_info for package redis

ernado

package main

import (
	"database/sql"
	"fmt"
	"log"
	"net/http"
	"strconv"
	"time"

ernado

export GOPATH := $(shell gb env | grep GB_SRC_PATH | sed -r "s/\/(\w+)\/src/\/\1/g" | sed -r "s:GB_SRC_PATH=|\"::g")
all: format check build test info
test:
	gb test
format:
	go fmt .
	goimports -w .
build:
	gb build
check: format

ernado

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

ernado

kernel.shmmax = 8000234752  // Это для PostgreSQL, чтоб можно было выставлять большой shared_buffers (6 - 8GB)
fs.file-max = 99999999  // Это для Nginx, без него можно получить "Too many open files"
net.ipv4.tcp_max_syn_backlog=524288  // Максимальное число запоминаемых запросов на соединение
net.ipv4.tcp_max_orphans=262144  // Максимальное число допустимых в системе сокетов TCP
net.core.somaxconn=65535  // Максимальное число открытых сокетов
net.ipv4.tcp_mem=1572864 1835008 2097152  // Потребление памяти для протокола TCP
net.ipv4.tcp_rmem=4096 16384 16777216  // Размер приемного буфера сокетов TCP
net.ipv4.tcp_wmem=4096 32768 16777216  // Количество памяти, резервируемой для буферов передачи сокета TCP

ernado

#!/bin/bash
# sets envs for golang
if [ -z "$GOPATH" ]; then
    export GOROOT="/usr/local/go"
    export GOPATH="/go"
    export PATH="$PATH:$GOPATH/bin:$GOROOT/bin"
fi

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Server install handbook

First of all

sudo apt install htop nano bash-completion man software-properties-common

Adding user

adduser ernado

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Keybase proof

I hereby claim:

• I am ernado on github.
• I am ernado (https://keybase.io/ernado) on keybase.
• I have a public key ASARBP3wjIuhAayj8vgiZl44cadDoOyB13zemBnIVs9Mywo

To claim this, I am signing this object:

ernado

// Expiration wraps month and year of card expiration.
type Expiration struct {
	Month time.Month
	Year  int
}

// LocalDate returns LocalDate that is equal to expiration date.
func (e Expiration) LocalDate() LocalDate {
	return Date(e.Year, e.Month, 1)
}