I second the use of zilstat - very useful, especially if you don't want to mess 
around with adding a log device and then having to destroy the pool if you 
don't want the log device any longer.

On Nov 18, 2009, at 2:20 AM, Dushyanth wrote:

> Just to clarify : Does iSCSI traffic from a Solaris iSCSI initiator 
> to a third party target go through ZIL ?

It depends on whether the application requires a sync or not. dd does not, but 
databases (in general) do. As Richard said, ZFS treats the iSCSI volume just 
like any other vdev (pool of disks), so the fact that it is an iSCSI volume has 
nothing to do with ZFS' zil usage. 

-Scott
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