Free Indexes, queries and scale lessonsIndexes, queries and scale · Stage 3 · Scaling out · Step 3
Choosing a data store
The families of non-relational stores, what each is good at, and a way to decide between them and a relational database. About 12 minutes.
Which is the strongest reason to choose a document store over a relational database?
- AThe data is read and written as whole, flexibly shaped objects, with few cross-object queries
- BIt is newer and faster for everything
- CIt provides stronger transactions across many records
Show the answer
The data is read and written as whole, flexibly shaped objects, with few cross-object queries. One read per object, with no schema migrations.
4 questions on this idea
Short questions that apply the idea to new cases: trace it, work out a number, put steps in order. A wrong answer explains itself.
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