89 lines
1.7 KiB
Markdown
89 lines
1.7 KiB
Markdown
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Welcome
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-------
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This is a presentation about NoSQL for cartographers.
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Why me?
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-------
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- 2008: first paid software job.
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- 2012: graduated Computing Science.
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- 2014-2016: Amazon Web Services.
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- 2016+: Uber.
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- Using SQL and NoSQL at dayjob.
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What is a server?
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-----------------
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SQL
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---
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- Invented > 50 years ago.
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- Technologies differ, concepts are the same.
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Power and limitation of SQL
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---------------------------
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Let's model a house on a piece of land.
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- There will be always a piece of land under a house.
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- SQL says you can enforce this.
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**They must be on the same server to enforce this constraint.**
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If constraint cannot be created, it's not SQL.
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If it's SQL, all houses and all areas must be on the same server.
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Get a big database
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------------------
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$30 to about a $1M. Show graphics.
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Alternatives
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============
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Cat videos do not require topology. But we still need storage -- No SQL!
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Like-SQL
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--------
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Forego some SQL constraints, but use the same (/similar) language:
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- No uniqueness constraints.
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- No foreign keys.
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- ... many more restrictions.
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Hive:
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```
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SELECT a.foo FROM invites a WHERE a.ds='2008-08-15';
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```
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Key-Value: fast & small
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-----------------------
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DynamoDB, Cassandra. Some have their language, some don't.
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DynamoDB:
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```
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table = dynamodb.create_table(
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TableName='users',
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KeySchema=[
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{ 'AttributeName': 'username', 'KeyType': 'HASH' },
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{ 'AttributeName': 'last_name', 'KeyType': 'RANGE' }
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],
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)
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```
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Cassandra:
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```
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INSERT INTO monkeys (type, family, common_name, conservation_status)
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VALUES ('New World Monkey', 'Cebidae', 'white-headed capuchin', 'Least concern');
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```
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Key-Value: slow & big
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---------------------
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S3.
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https://www.youtube.com/watch?v=8vQmTZTq7nw
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