abhishekmishragithub

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

abhishekmishragithub

About programms

• Death to the Dialog Box
• Defending Perpetual Intermediacy
• Are your exceptions silent?
• Teaching Users to Read
• You'll Never Have Enough Cheese
• Gold Plating
• Happy Talk Must Die
• The Broken Window Theory

abhishekmishragithub

Workshop: YugabyteDB Multi-Region Deploymnets

The gist includes exercises for the "Mastering Multi-Region Deployments With YugabyteDB" workshop. follow the steps below to get a practical experience.

• Workshop: YugabyteDB Multi-Region Deploymnets
  • Prerequisite
• 1. Start Cluster With Default Configuration

abhishekmishragithub

#Test credit card numbers to use when developing with Stripe

4242424242424242 Visa

4012888888881881 Visa

4000056655665556 Visa (debit)

abhishekmishragithub

The PATH is an important concept when working on the command line. It's a list of directories that tell your operating system where to look for programs, so that you can just write script instead of /home/me/bin/script or C:\Users\Me\bin\script. But different operating systems have different ways to add a new directory to it:

Windows

1. The first step depends which version of Windows you're using:

• If you're using Windows 8 or 10, press the Windows key, then search for and

abhishekmishragithub

Ip Ranges

Sometimes it's useful to know what IP ranges our servers are operating in. Since we run on Heroku, it's a little complicated. However, Heroku runs on AWS, which has this page dedicated to IP Ranges by Region.

Heroku recommends using this to identify which region are bing in use. If dynos are run in common spaces in US region, we can look up information about this region using Heroku's API:

using httpie:

 http https://api.heroku.com/regions/us "Accept:application/vnd.heroku+json; version=3"

abhishekmishragithub

Startup Scripts

Start a database instance within a few seconds on you machine.

PostgreSQL

Start

docker run --name postgresql -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=password \

abhishekmishragithub

git_current_branch () {
        local ref
        ref=$(command git symbolic-ref --quiet HEAD 2> /dev/null) 
        local ret=$? 
        if [[ $ret != 0 ]]
        then
                [[ $ret == 128 ]] && return
                ref=$(command git rev-parse --short HEAD 2> /dev/null)  || return
        fi
        echo ${ref#refs/heads/}

abhishekmishragithub

import datetime
from google.cloud.firestore import Client
import random
import requests

import prefect
from prefect import Flow, Parameter, task
from prefect.client import Secret
from prefect.schedules import CronSchedule

abhishekmishragithub

App Install Plan

Critical

• iTerm2

  • https://iterm2.com/

• Command Line Tools

  • xcode-select –install