distributed-locks-leases

Distributed locking prevents concurrent execution by enforcing cross-node mutual exclusion. This skill implements TTL-based lease management and monotonic fencing tokens to ensure only one process runs your scheduled tasks or background migrations at any given time.

The safest distributed lock strategy uses consensus-backed safety and fencing tokens to mitigate split-brain and mid-work expiry hazards. This approach protects against clock skew and GC pauses by validating lease ownership before executing critical operations.

Yes, you can use Redis or Postgres for distributed mutual exclusion and leader election. This skill provides implementation patterns tailored to these existing infrastructure components to serialize access to shared resources and coordinate active-passive failover.

The best way to implement leader election for active-passive failover is through TTL-based lease management. This ensures consensus-backed safety by granting a temporary, expiring lease to a single node, preventing split-brain scenarios during network interruptions.

Distributed locks fail during GC pauses because a process may hold an expired lease without knowing it. Fencing tokens provide a monotonically increasing identifier that downstream services check to reject stale operations from paused processes.

You need consensus backing to safely manage TTL-based leases because it guarantees mutual exclusion during network partitions. This prevents split-brain scenarios by ensuring no two nodes can simultaneously believe they hold the active lease.