On Fri, May 18, 2012 at 04:18:12PM +1000, Daniel Carosone wrote:
> When doing a scrub, you start at the root bp and walk the tree, doing
> reads for everything, verifying checksums, and letting repair happen
> for any errors. That traversal is either a breadth-first or
> depth-first traversal of the tree (I'm not sure which) done in TXG
> order.  
> [..]
> Note that there can be a lot of fanout in the tree;

Given the latter point, I'm going to guess depth-first.  Yes, I should
look at the code instead of posting speculation. 


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