[linux-lvm] Why doesn't the lvmcache support the discard (trim) command?
g.danti at assyoma.it
Fri Oct 19 12:45:02 UTC 2018
On 19/10/2018 12:58, Zdenek Kabelac wrote:
> Writecache simply doesn't care about caching your reads at all.
> Your RAM with it's page caching mechanism keeps read data as long as
> there is free RAM for this - the less RAM goes to page cache - less read
> operations remains cached.
Hi, does it mean that to have *both* fast write cache *and* read cache
one should use a dm-writeback target + a dm-cache writethrough target
(possibly pointing to different devices)?
Can you quantify/explain why and how faster is dm-writeback for heavy
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