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
On 2017/08/03 6:00, Jonas wrote:
> 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?
> dm-devel mailing list
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