Hi Jonas, I am developing dm-writeboost. Thank you for your interest. I couldn't understand how you try to stack devices. You should share diagram if you want others to know your idea precisely. But this may help you. dm-writeboost can't use zram as the caching device. I thought this is device-mapper's issue so you may confront this when you try the stacking. https://github.com/akiradeveloper/dm-writeboost/issues/60 Akira On 2017/08/03 6:00, Jonas wrote: > > Hi > > I want to write data to dm-dedup device, store that on a zram w lz4 compressed. Then dm-mirror the zram to dm-writeboost that have a Ssd as block device/final destination. > > Is there any guide w examples on how to stack device mappers? Or anyone having instructions or guidlines on how to do? > > /J > > > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel