Glossary

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Glossary / Evaluation and implementation guide

Event Replay

Event replay is the ability to reprocess the raw event stream after fixing a broken automation or changing logic such as lead scoring.

It differs from rerunning a workflow instance: replay starts from stored raw events, so what you can recover depends entirely on how long the platform retains the stream and whether the events are stored in replayable form.

When a misconfigured trigger suppresses thousands of leads, replay capability determines whether the damage is recoverable or permanent. Retention windows and replay scope are therefore real buying criteria for event-driven platforms.

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A practical example

Example: a scoring rule bug silently drops two weeks of behavioral events.

The team fixes the rule, then replays the stored event stream for that window so scores rebuild from the original data instead of staying frozen at the failure point.

What to evaluate before investing

  • Ask vendors for the exact retention window of the raw event stream and whether it can be extended.
  • Confirm replay can be scoped by event type, time range, or segment rather than only all-or-nothing.
  • Check whether replayed events are marked as replays downstream, so attribution and reporting can exclude or flag duplicates.

Limitations and tradeoffs

Replay re-creates downstream effects, so replaying into live systems can double-send emails or duplicate records unless targets are idempotent or replay mode isolates output. Plan the replay target as carefully as the fix itself.

Plan your next step with MeshLine

Connect this decision to your automation, organic marketing and customer lifecycle management. In a MeshLine demo, discuss your existing tools, the scope you need and how to measure the result.

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