On 06/03/2016 09:50 AM, Andrew Armenia wrote:
This patch adds mount option 'chunk_width_limit=X', which when set forces
the chunk allocator to use only up to X devices when allocating a chunk.
This may help reduce the seek penalties seen in filesystems with large
numbers of devices.

Have you reviewed implementations like device allocation grouping?
Some info is in the btrfs project ideas..

https://btrfs.wiki.kernel.org/index.php/Project_ideas
 Chunk allocation groups
 Limits on number of stripes (stripe width)
 Linear chunk allocation mode

(Device allocation grouping is important for enterprise storage solutions).

Thanks, Anand
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