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  1. Video

    • Host -> YouTube - Private Video -> Udacity -> Vimeo, Wistia -> Self Hosted - nginx
    • Analytics
      • Lot of data
      • 1 user watches for 10 seconds on 100 videos * 10_000
      • Lot of writes
      • Frame by Frame analysis -> 30 FPS -> 120 second -> 3600

  2. Members

    • Sign up
    • Login
    • Remember things
    • Email Validation / Confirmation
    • Payments

AstraDB - Managed NoSQL Cassandra

  • Database name

    • Keyspace name
      • Tables
    • Keyspace name A
      • Table A
      • Table b
      • Table c

  • Database for Testing

    • keyspace -> Project 1
      • tables (correspond to prod)

Create a user via shell

from app import db
from app.users.models import User

db.get_session()
User.objects.create(email='[email protected]', password='abc123')
User.objects.create(email='[email protected]', password='abc123d')
q = User.objects.all()

for user in q:
    print(user.email, user.user_id, user.password)

Bootstrap 101

Common Classes

  • Layout

    • container-fluid or container
      • row
        • col (100% width)
      • row
        • col-6 (50%)
        • col-3 (25%)
        • col-3 (25%)
      • row
        • col-9 (75%)
        • col-3 (25%)
      • row
        • col-md-9 col-12 (75% at medium size screen, 100% below that)
        • col-md-3 col-12 (25% at medium size screen, 100% below that)

  • Buttons

    • btn btn-primary or btn btn-secondary this is a primary or secondary color (basically blue or gray)
    • btn btn-outline-primary this is a clear button with a blue outline
    • btn btn-sm btn-success this is a small button with green

  • Forms

    • form-control on an <input> element makes the form input a bootstrap class

  • Spacing

    • my-5, my-4, ..., my-1 gives a relative margin on top and bottom
    • py-5, py-4, ..., py-1 gives a relative padding on top and bottom
    • mx-5 or px-5 changes the direction of the margin/padding to left and right (due the x) instead of top/bottom (which was due to the y)
    • me-3 or pe-3 changes the direction of the margin/padding to only the end (aka after & due to the e).
    • ms-2 or ps-2 changes the direction of the margin/padding to only the start (aka start due to the s).

  • Video

    • ratio ratio-16x9 or ratio ratio-1x1 in a div above an iframe will resize the video to fit that ratio.