> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Bob Friesenhahn
> data formats like
> databases could become internally corrupted due to the data written in
> a zfs transaction group not being representative of a coherent
> database transaction.
Although this is true, it's only true to the extent that "corruption" is a
term applicable to power loss.
If some database application is performing operations all over the place,
unaware of what ZFS or any other filesystem sync policy is in force... Then
ZFS ungracefully crashing with sync disabled and rewinding to some previous
state would be just like ext4 having the power yanked out suddenly. If your
application is able to survive power loss, then it's able to survive
ungraceful crash with zfs sync disabled.
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