How do you arrange a book shelf?
By Color?
Alphabetically?
By Genre?
There are tonnes of ways to arrange a bookshelf, aye?
Letâs take a bookshelf to
understand High Cardinality.
The explosion of unique data combinations in a time series data base is
Cardinality.
Letâs take just 4 âgenresâ to explain Cardinality.
Letâs add Paperback vs Hardbound into the mix.
Letâs add another variation: Aliens
Aliens? Does the book have alien civilizations or not?
Think carefully about your answer!
*Hint: It's not 16.
The Alien label applies only to the Sci-Fi genre, so the answer is⌠10
Imagine increasing the number of
variables in this list, such asâŚ
Length: Under 300 pages
Weight: Under 200, True Story, etcâŚ
Suddenly, the dimensions explode.
This is High Cardinality.
High Cardinality is why systems break, your Uber cabs donât arrive on time, and your food order vanishes every once in a while. đ
These are complex problems that need unique solutions.
