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by viraptor
1587 days ago
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It's few KB per-record. In practice when schemes like that are applied, it means "in total we can remove this key and not rewrite 10M rows across 3 data stores which itself would cost $$$ and make the database and incremental backups cry". |
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We did a similar thing except replacing the values with a UUID and storing the pair in a lookup table somewhere. Delete that row and none of the rest of the data is able to be tied back to a human being.
Bonus, most people didn't need that data, and it was no longer given out to everyone who grabbed the entire dataset.