[Btrfs-devel] Device concatenation pushed out to the (really really) unstable tree

[Chris Mason]

Ok, I've just pushed out raid0 as well.  The current code stripes across all 
the devices present in the FS all the time.  Even though tuning has been very 
limited, the performance in my limited testing is the same as building on top 
of an LVM or hardware stripe set.

The next step is to implement mirroring, that will take a little longer 
because it is slightly more complex.

After that comes the harder work of making sure everything gets mirrored 
properly, and making policies for which bytes get put on which type of 
extents.

-chris