Mertol Ozyoney wrote:
>
> Hi All ;
>
> One of our customer is suffered from FS being corrupted after an 
> unattanded shutdonw due to power problem.
>
> They want to switch to ZFS.
>
> From what I read on, ZFS will most probably not be corrupted from the 
> same event. But I am not sure how will Oracle be affected from a 
> sudden power outage when placed over ZFS ?
>
> Any comments ?
>

Most databases have the ability to recover from unscheduled interruptions
without causing corruption. ZFS works in the same way -- you will recover
to a stable point in time. In-flight transactions will not be completed, as
expected. Upon restart, ZFS recovery will happen first, followed by the
database recovery.

> PS: I am aware of UPS’s and smilar technologies but customer is still 
> asking those if ... questions ...
>


UPS's fail, too. When we design highly available services, we will
expect that unscheduled interruptions will occur -- that is the only way
to design effective solutions.
-- richard

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