Week 11: Content Delivery

Terms you should know

Paul Krzyzanowski

April 15, 2021

Content Delivery Networks

  • Flash crowd problem, slashdot effect
  • Network edge
  • Caching
  • Caching proxy
  • Benefits of load balancer
  • Multihoming
  • Content Delivery Network (CDN)
  • Push CDN vs. Pull CDN
  • Overlay network
  • Mapping system
  • Dynamic DNS server
  • Akamai domain name lookup
  • Origin server
  • Transport system
  • Parent content servers vs. edge content servers
  • Security benefits of a CDN
  • Load shedding
  • Adaptive bitrate coding (ABR)

Peer-to-Peer Content Delivery

  • Gnutella
    • Gnutella basic architecture
    • Content publishing, search, download
    • Forwarding loops
    • Time to Live (TTL)
    • How does Gnutella provide anonymity?
  • Kazaa
    • Supernodes vs. ordinary nodes
    • Content publishing, search, download
  • BitTorrent
    • Purpose of .torrent file
    • Purpose of seed nodes
    • Purpose of trackers
    • Seeders vs. leechers
    • Content publishing, search, download

Kafka

  • Purpose of Kafka
  • Publishers (producers), subscribers (consumers)
  • Role of message broker
  • Topics
  • Partitions & partitioned logs
  • Durable logs
  • Replicated logs: leaders and followers
  • Consumers and consumer groups
  • Scaling to handle higher message volumes
  • Scaling to handle more processing workloads
  • Queuing vs. publish-subscribe

Distributed Caching as a Service

  • Purpose of a cache
  • Memcached - basic role & deployment
    • How a client locates the correct memcached server
    • Eviction and expiration
    • What servers know about each other
    • You don’t need to know the commands
  • Redis - basic role & deployment
    • Main features added over memcached
    • You don’t need to know data types but know that they are used
    • Expiration and eviction
    • Transactions
    • Message broker service
    • Range vs. hash partitioning
Last modified April 16, 2021.
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