Peter Cudhea wrote:
> Thanks, this is helpful. I was definitely misunderstanding the part that
> the ZIL plays in ZFS.
>
> I found Richard Elling's discussion of the FMA response to the failure
> very informative.   I see how the device driver, the fault analysis
> layer and the ZFS layer are all working together.    Though the
> customer's complaint that the change in state from "working" to "not
> working" is taking too long seems pretty valid.
>   

I wish there was a simple answer to the can-of-worms^TM that this
question opens.  But there really isn't.  As Paul Fisher points out,
logging 17,951 e-reports in 9 minutes seems like a lot, but I'm quite
sure that is CPU bound and I could log more with a faster system :-)
The key here is that 9 minutes represents some combination of timeouts
in the sd/scsa2usb/usb stack.  The myth of layered software says that
timeouts compound, so digging around for a better collection might
or might not be generally satisfying.  Since this is not a ZFS timeout,
perhaps the conversation should be continued in a more appropriate
forum?
 -- richard


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