manhdaovan

Description: (SO0062) - Distributed Load Testing on AWS is a reference architecture to perform application load testing at scale. Version v3.2.3
AWSTemplateFormatVersion: "2010-09-09"
Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: Console access
        Parameters:
          - AdminName
          - AdminEmail

manhdaovan

FROM alpine:latest

WORKDIR /app

COPY . /app

ENTRYPOINT [ "ash", "entry.sh" ]

manhdaovan

manhdaovan

var goroutineID uint64

// Go is a simple replacement for `go` keyword, but returns its ID.
// Go also passes the goroutine ID to function `f`.
// Only use it when you want to use the ID attached with function `f` executed by a goroutine.
// Otherwise, just use nornal `go` keyword.
func Go(f func(goroutineID uint64)) uint64 {
  id := atomic.AddUint64(&goroutineID, 1)
  go f(id)
  return id

manhdaovan

- Algorithmic complexity / Big-O / Asymptotic analysis
- Data Structures
  - Arrays
  - Linked Lists
  - Stack
  - Queue
  - Hash table
- More Knowledge
  - Binary search
- Sorting

manhdaovan

#!/bin/bash

# Simple tool to check probation of given URL
# using cURL with HTTP GET method.

url=$1
TXT_RED='\033[0;31m'
TXT_GREEN='\033[0;32m'

# check until pressing Ctr+C

manhdaovan

##Working configuration to accomplish 0-downtime deploy with unicorn 5.x and systemd on centos 7

The scope is to accomplish a 0-downtime reload of a unicorn service managed by Systemd on a Centos 7 distro.

The examples and assumptions that i found on the bogomips's unicorn repo seems not working for centos 7.

Below a working configuration tested on Centos 7 and unicorn 5.1

Any advice/remark will be appreciated

manhdaovan

• install xcode command line:
  • xcode-select --install
• install mysql
  • brew install [email protected] (i dont want to install mysql 8)
• export some compiling flag: (as show in brew info [email protected]
  • export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
  • export CPPFLAGS="-I/usr/local/opt/[email protected]/include"
  • export PKG_CONFIG_PATH="/usr/local/opt/[email protected]/lib/pkgconfig"
• bundle install again
• bundle install

manhdaovan

package main

import (
	"fmt"
)

type A struct {
	val int
}

manhdaovan

type sequenceIDGenerator struct {
	idMgrClient IDManagerClient // client for getting IDPrefix
	preGenerateIDs chan string // pre-generated ids
}

// Pre-generate id and send to channel.
// This method should be called once and only once when init generator
func (g *sequenceIDGenerator) preGenIDs() {
	var idBase, id string
	var seq uint64