The original title is: "GBase 8a 9.5.3 New Feature: Event‑Based Data Node Replacement (eventMode)"

Short summary

GBase 8a 9.5.3 introduces eventMode, an event-driven method for replacing failed data nodes that synchronizes change events instead of triggering full redistribution. The feature decouples node recovery from long-running rebalancing tasks, reducing downtime at the cost of temporary resource spikes. The article includes command-line usage, prerequisites, and log output from a real 3-node cluster.

• •eventMode replaces failed data nodes by syncing change events, avoiding full redistribution
• •Requires pausing ongoing rebalancing before invocation; script auto-checks prerequisites
• •Faster recovery but generates many internal events, causing brief performance fluctuations

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