[Gluster-users] Bricks vs LVM

[Mark s2c]

What would you say are the efficiencies of using LVM to upgrade and add capacity to the glusterFS and this increasing the size of the bricks? Does gluster need to do anything when bricks are increased in size suddenly?

Or should I really be not using LVM and adding more bricks explicitly?

Just been thinking about this slide deck
http://rhsummit.files.wordpress.com/2014/04/black_w_1650_red_hat_storage_server_administration_deep_dive1.pdf

And why LVM is optional - I want to simplify my grid as much as poss. 

Cheers Mark