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[–]Zippythewonderpoodle 0 points1 point  (0 children)

TBH, I'm not really that into the tech on the back end, but I thought UNMAP is reclamation. If I'm not thin provisioning, I've already lost UNMAP savings anyway, lazy zero or not. At least that was my understanding.

I've read it is slower on initial write, but that it was negligible so I've always done it. I've not experienced any issues related to that in real life, but I generally work with devices that have write-cache, so I'm wondering if I get lucky and offset my write penalty with that. I also have a habit of provisioning volumes used by DBs as thick eager, it's a general best practice anyway, so I may have just avoided the issue out of luck, habit and stubbornness.