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tell me your experience using zfs/btrfs
(programming.dev)
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My only complaint with btrfs when I used to run it, is that kvm disk performance was abysmal on it. Otherwise I had no issues with the fs.
Most of the tools now should be setting nocow for virtual drives, performance these days isn't bad.
nodatacow is a hack and will disable any and all consistency mechanisms for that file's contents. Tools should not be setting nodatacow for virtual drives, certainly not by default.
Default libvirt behavior since 2020. Pretty sure some database tools turn it on too.
They do. Otherwise they run like Oracle when auditd is configured and running.
Yikes.
Really? Were the virtual disks running ext4?
Yes.