Hi, I have a column family with data (metrics) that is never overwritten and only deleted using TTLs, and I am wondering if it would be reasonable to have a very low gc_grace_period (even 0) on that CF. I would like to do that mainly to save space and also to prevent tombstone scanning.
>From what I understand of what I could read online, when an expired TTLed column is compacted, it is replaced by a tombstone, so having gc_grace_period would prevent that. Although this would allow the appearance of ghost/zombie columns. The question I'm trying to answer here is the following: Would those ghost columns be able to appear, and if so, would it be a problem, since they would themselves be marked as "expired"? Thanks, Kévin
