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Extend write consistency factor text, reapply on client vs lower factor #1013

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merged 2 commits into from
Jan 28, 2025

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@timvisee timvisee commented Jul 8, 2024

Fixes qdrant/qdrant#4626

Rendered: https://deploy-preview-1013--condescending-goldwasser-91acf0.netlify.app/documentation/guides/distributed_deployment/#write-consistency-factor

This extends the write consistency factor description a bit. It improves on two points.

First, if a high write consistency factor is used an operation might fail to apply if there aren't enough active replicas. It now describes that the user is responsible for sending the operation again, to ensure a consistent state.

Second, this now describes that a lower write consistency factor may be used. In that case the write will be accepted if there are non-active replicas. Unresponsive replicas are marked as dead and are automatically recovered by the cluster to guarantee data consistency once available.

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Thank you @timvisee! 🙌

@timvisee timvisee force-pushed the distributed-write-factor-lower-value branch from c205284 to 7ad4e50 Compare January 28, 2025 15:43
@davidmyriel davidmyriel merged commit 1d0b790 into master Jan 28, 2025
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@davidmyriel davidmyriel deleted the distributed-write-factor-lower-value branch January 28, 2025 16:28
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Upserts partially committed during node restart
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