[sheepdog-users] device priority by performance and number of accesses

[Valerio Pachera]

When sheep writes on multi device is writes like raid 0.
This should give us very good performance.

I read a bit about http://sourceforge.net/projects/tier/.
The idea behind it is to write the most accessed chunks in the faster devices.

In case we have a server with some mechanical disks and one or more
ssd this approach may raise performance even more.
The idea may be implement in later versions of sheepdog if you think
it worth it.

I was discussing with Alessandro how to get the best out from some ssd
we have and wish to use into the cluster.
Using 250G of disk for cache is even too much  and may lead to trouble
when it's time to flush it.

What do you think about it?