Nicolas Williams wrote:
> It's possible, I suppose, that when the block pointer rewrite feature is
> complete then you'll be able to kick off a rewrite of your pool that
> causes some of these options (e.g., compression) to be applied to old
> data.  Matt Ahrens wrote about the block rewrite feature in his blog:
> 
> http://blogs.sun.com/ahrens/entry/new_scrub_code
> 
> I could a bright future for block pointer rewrite.

Oh wow, I hadn't thought of that connection.  I'd read that post when it came
out, but now I see what you mean.  This could be very exciting if it turns out
to be true (applying new settings to old data).

Thanks!
Eric
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