Single-node is fine if:
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You’re in MVP or early growth
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Downtime of a few minutes is acceptable
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Cost efficiency is more important than HA
Clustered makes sense if:
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You need high availability
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You can’t tolerate downtime
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You’re running production workloads with SLAs
Why this matters:
Clusters add redundancy and automatic failover — but also complexity and cost.
Pro tip:
Start single-node, design your app to be cluster-ready, then upgrade when the business demands it.