Comments (6)
@ikosyanenko , Scaling up does not loose any data. The data loss is only possible if you scale cluster down and remove shards.
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@alex-zaitsev one more question. How do you move shard? Copying?
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@ikosyanenko , what do you mean by 'move shard', could you elaborate your use case?
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If I am scaling up a cluster. Do you move existed shards?
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No, we don't. New shards are empty. You can manually move data with 'insert select' or using https://clickhouse.yandex/docs/en/operations/utils/clickhouse-copier/
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Ok, thanks
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