On Wed, Feb 27, 2013 at 03:30:47PM -0300, Leo Antonio wrote: > Thanks for answers. > > > I take a look in dm-cache-target, I really dont knew this project. > > Joe, what is the best way to continue this discussion? > > Do you have some documentation besides what is into kernel source, like > Papers, Architecture Projects etc? > What is the best way to start to understand this? The best place to start is by reading Documentation/device-mapper/cache.txt and trying it out a bit. Then read drivers/md/dm-cache-policy.h which defines the interface that policies use. Finally look at dm-cache-policy-mq.c (multiqueue policy). This should give you a good idea of the responsibilities of a policy. An alternative project would be creating a framework for assessing cache policies. Not just providing a range of different cache loads (though that is a big important part), but also providing feedback to the policy developer as to how their policy could be improved. I'd like to see a tool that calculates the optimimum series of promotions/demotions for a given io load and so comes up with a theoretical 'best' performance. - Joe _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
