[OpenIndiana-discuss] What happens when a ZIL drive dies?

[Jesus Cea]

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On 07/06/12 17:06, Bob Friesenhahn wrote:
> On Thu, 7 Jun 2012, Jesus Cea wrote:
>> 
>> I always wondered WHY. What is the point of keeping separate ZILs
>> (one per dataset) when having a discrete LOG device.
>> 
>> Any idea?.
> 
> The implementation is obviously very much simplified by using
> discrete contiguous ZILs.  Otherwise there is a lot more complexity
> and activity to track which I/Os have completed.  With the current
> approach, only one write is necessary to record that a batch of
> writes have been committed to the pool.

Uhm.... and how is it done when you don't have a LOG device?. That is,
when the ZILs are in the harddisk?. There moving the disk arm should
be something to avoid/reduce.

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