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Hey, we've had our blob storage costs spike up +70% for two days (Oct 4th and Oct 5th), across almost all of our storage accounts, regions and hot/cold/archive

Hey, we've had our blob storage costs spike up +70% for two days (Oct 4th and Oct 5th), across almost all of our storage accounts, regions and hot/cold/archive tiers. The spike is a consistent ~70% for each of the affected accounts, and this includes accounts where there have been no writes for months (so why is there an increase), as well as accounts where we never delete (so while an increase would be surprising, the decrease on Oct 6th is impossible). Is this similar to what you're seeing ? I was considering writing to Azure support about that... My last billing issue with them took ~120 days to resolve, so I don't have much hope.

deathanatos 4y ago
Incredible. You've nailed both the amount (the +70%)¹ and the days (yep, Oct 4th & 5th). You are also right that it is across storage accounts, and access tiers: I've now looked at some of our other SAs, including ones in the Hot tier, and yep, they see the same bizarre uptick. Given that Hot tier is experiencing it, that rules out the possibility of "human error" w.r.t. to it not being a Cool-tier early deletion. > Is this similar to what you're seeing ? You've nailed it precisely; it sounds exactly like what we're seeing. (What a small world HN is sometimes!) ¹the numbers on our end wiggle a bit, so I'm not sure about how precise I can estimate the uptick. But 70% is as close as any guess.
- itsdrewmiller 4y ago
  This comment inspired me to check our storage spend and we also have a very unusual spike in storage cost on Oct 4th and 5th. More like 40% increase than 70% though, hot tier.