[linux-lvm] Why doesn't the lvmcache support the discard (trim) command?

Zdenek Kabelac zkabelac at redhat.com
Fri Oct 19 09:49:53 UTC 2018

Dne 19. 10. 18 v 11:42 Gionatan Danti napsal(a):
> On 19/10/2018 11:12, Zdenek Kabelac wrote:
>> And final note - there is upcoming support for accelerating writes with new 
>> dm-writecache target.
> Hi, should not it be already possible with current dm-cache and writeback 
> caching?


dm-cache targets different goal - new  dm-writeback cache has way more optimal 
write-pattern to accelerate writes - compared even with 'writeback' mode.

Another point is - dm-writecache is written with 'NVDIMMs' in mind and it's 
also simpler.


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