[Nbd] BCache with NBD is it possible?

[Juan Antonio Martinez <jantonio@...1345...>]

Hi all:
I have 250+ ubuntu 13.10 ltsp fat clients. As client hardware is a "bit
obsolete" and don't want to buy extra memory for those computers, we are
studying some configurations to improve performance.

As on 13.10 BCache comes in the kernel mainline we'll want to use local
client's disk as cache for nbd device.

Is it possible? BCache documentation suggest it, but didn't find any
tutorial/guide. Everything I got is a message like "Device /dev/nbd0 is
not a partition, a logical volume or a LUKS volume" when using "blocks
to-cache" commannd

Thanks in advance
Juan Antonio