> Configure your real disk(s) to be in a mirror set with md. Configure
> the network block device in the mirror set too but mark it bad. In the
> usual situation, then, reads are satisfied from the real disk and
> writes to the mirror set are written to the real disk (and nowhere
> else) so its fast.
We can also add code to the RAID driver which will fine tune the read
balancing algorithm -- instead of uniformally distributing reads over
the mirrors, we can issue write requests to all the mirrors, but issue
read requests only to the local mirrors.
Gadi