Re: Update to Project_ideas wiki page

[Hugo Mills <hugo-lkml@carfax.org.uk>]

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On Tue, Nov 16, 2010 at 10:19:45PM -0500, Chris Ball wrote:
> Hi,
> 
> Chris Mason has posted a bunch of interesting updates to the
> Project_ideas wiki page.  If you're interested in working on any
> of these, feel free to speak up and ask for more information if
> you need it.  Here are the new sections, for the curious:
> 
> == Block group reclaim ==
> 
> The split between data and metadata block groups means that we
> sometimes have mostly empty block groups dedicated to only data or
> metadata.  As files are deleted, we should be able to reclaim these
> and put the space back into the free space pool.
> 
> We also need rebalancing ioctls that focus only on specific raid
> levels.

> == Changing RAID levels ==
> 
> We need ioctls to change between different raid levels.  Some of these
> are quite easy -- e.g. for RAID0 to RAID1, we just halve the available
> bytes on the fs, then queue a rebalance.

   I would be interested in the rebalancing ioctls, and in RAID level
management. I'm still very much trying to learn the basics, though, so
I may go very slowly at first...

   Hugo.

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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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