Creating a collaborative app using CRDTs

Pierre Hedkvist
Apr 1 · 8 min read

Commutative: a*b=b*a
Associative: (a*b)*c = a*(b*c)
Idempotent: (a*a) = a

* = binary operation, example: max, union, or

Commutative: max(a,b) = max(b,a)
Associative: max(max(x,y),z) = max(x,max(y,z))
Idempotent: max(x,x) = x

Commutative: (a ∪ b)= (b ∪ a)
Associative: (a ∪ b) ∪ c) = (a ∪ (b ∪ c))
Idempotent: (a ∪ a) = a

Counters

G-Counter (Grow-only)

Sets

2P-Set

Sequences

Pierre Hedkvist

Written by

Software Engineer from Sweden

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