28 lines
927 B
Markdown
28 lines
927 B
Markdown
# lec24
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## NoSQL
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Why NoSQL is a thing
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1. Scaling
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Scaling demands more computing power over time.
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Relational databases require more vertical scaling where machines must be upgraded constantly.
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Alternatively horizontal scaling allows for clustering computing style upgrades where computational power can be cheaper for upgrades maintaining support for large userbase.
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2. Data Migration
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If you change a schema then you have to painfully move everything over with the new schema.
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This means downtime in some cases, no matter how small the change.
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3. OOP
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`Rows != Objects`: the key distinction here is that objects can contain other objects while SQL rows can not.
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4. Open Source
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Many of the more popular NoSQL database systems happen to be open source and have permissive licensing.
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Getting started can suck though because you have sometimes have to implement certain features with something like _MySQL_ already have.
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