Software Design

Distributed Lock Acquisition Using Redlock

UML Sequence Diagrams · made in Skemio

Sequence diagram tracing Redlock lock acquisition across three independent Redis nodes, verifying quorum and TTL calculation.

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What it shows

Clients request locks sequentially across N independent master nodes.
Acquisition succeeds only if a quorum grants the lock within validity limits.
Total elapsed acquisition time is subtracted from TTL to avoid stale locks.

The takeaway

Distributed locks require quorum across independent nodes and strict clock drift compensation.

#Redis
#DistributedSystems
#SystemDesign
#Database
#Concurrency
#SoftwareEngineering

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