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Welcome

NoSQL for cartographers.

Motiejus Jakštys

2019-11-08

Why me?

  • 2008: first full-time software job.
  • 2009-2012: graduated Computing Science in Glasgow.
  • 2014-2016: job: Amazon Web Services.
  • 2016-now: job: Uber.

SQL and NoSQL are part of the job.

What is a server?

Demonstration.

  • pi
  • pi-at-home.jpg

SQL

  • Invented > 50 years ago.
  • Technologies change, concepts remain.

Power and limitation of SQL

Let's model a house on a piece of land.

  • There will be always a piece of land under a house.
  • SQL says you can enforce this.

They must be on the same server to enforce this constraint.

What do we do?

Get a big database

$30 to about a $1M.

Alternatives

Split data across many servers!

Topology is not always needed:

  • Pictures/videos.
  • Stock prices.
  • Sensor measurements.

Hey, No SQL!

Sort-of-SQL

Leave the syntax, cut out constraints.

  • familiar syntax.
  • more storage.
  • less features.

Hive:

SELECT a.foo FROM invites a WHERE a.ds='2008-08-15';

Key-Value: fast & small

  • Different syntax
  • Different features

DynamoDB:

table = dynamodb.create_table(
    TableName='users',
    KeySchema=[
        { 'AttributeName': 'username', 'KeyType': 'HASH' },
        { 'AttributeName': 'last_name', 'KeyType': 'RANGE' }
    ],
)

Key-Value: slow & very big

Videos or just large files? S3 is most popular.

Imaginge an infinite disk.

Cloud

"The Cloud" is just someone's servers with software.

  • pi-datacenter.jpg
  • datacenter.jpg
  • snowball-edge.jpg

Storage

Storage in "the cloud" is quite cheap. People start moving.

https://www.youtube.com/watch?v=8vQmTZTq7nw

What next?

  • Create an account in S3.
  • Upload a file there.
  • Share it with everyone under your domain.
  • It's free!

Want to know more?