On Tue, 18 Jul 2017 16:57:10 +0500
Roman Mamedov wrote:
> if a block written consists of zeroes entirely, instead of writing zeroes to
> the backing storage, converts that into an "unmap" operation
> (FALLOC_FL_PUNCH_HOLE[1]).
BTW I found that it is very easy to "offline" process preexisting fil
Hello,
Qemu/KVM has this nice feature in its storage layer, "detect-zeroes=unmap".
Basically the VM host detects if a block written by the guest consists of
zeroes entirely, and instead of writing zeroes to the backing storage,
converts that into an "unmap" operation (FALLOC_FL_PUNCH_HOLE[1]).
I
