zfs discuss - May 2007 - Force rewriting of all data, to push stripes onto newly added devices?

I''m just in sort of a scenario, where I''ve added devices to a
pool and would now like the existing data to be spread across the new drives, to
increase the performance. Is there a way to do it, like a scrub? Or would I have
to have all files to copy over themselves, or similar hacks?

Thanks,
-mg
 
 
This message posted from opensolaris.org

Mario Goebbels wrote:
> I''m just in sort of a scenario, where I''ve added devices 
> to a pool and would now like the existing data to be spread 
> across the new drives, to increase the performance. Is 
> there a way to do it, like a scrub? Or would I have to 
> have all files to copy over themselves, or similar hacks?
> 
> Thanks,
> -mg
>  

This requires rewriting the block pointers; it''s the same
problem as supporting vdev removal.  I would guess that
they''ll be solved at the same time.

- Bart


-- 
Bart Smaalders			Solaris Kernel Performance
barts at cyber.eng.sun.com		http://blogs.sun.com/barts

Mario Goebbels wrote:
> I''m just in sort of a scenario, where I''ve added devices
to a pool and would now like the existing data to be spread across the new
drives, to increase the performance. Is there a way to do it, like a scrub? Or
would I have to have all files to copy over themselves, or similar hacks?
for the short term, cp works (or any other process which would result in a new
write
of the files).
  -- richard