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Network retries can cause duplicate appends. Snakream supports producer-level deduplication so your application doesn’t have to:
  • Producer-Id: a stable client identifier (e.g. a UUID)
  • Producer-Epoch: incremented each time the client restarts
  • Producer-Seq: a per-epoch sequence number starting at 0
The server tracks these per producer. If a retried append carries the same epoch and sequence, it is silently deduplicated. If there’s a gap or epoch regression, the server rejects the write. This gives you exactly-once semantics without application-level bookkeeping.