Tiered/cached storage and DragonFlyBSD

[Matthew Dillon]

swapcache can cache NFS data, but it won't accelerate writes.  It's
strictly a passive cache of clean/cleaned data.

The current dragonfly master does have some fixes pushed for Hammer2 which
should improve flush performance some.

-Matt

On Tue, Aug 21, 2018 at 7:40 AM, Aaron LI <aly at aaronly.me> wrote:

> On Tue, 21 Aug 2018 16:12:37 +0200
> "my123 (@never_released)" <securetalk at sbmobilepilot.onmicrosoft.com>
> wrote:
>
> > On my laptop, I use a DragonFlyBSD VM with NFS to use HAMMER2 features.
> > (ZFS for example doesn't support on-demand deduplication).
> >
> > Is there any way to combine a part of my SSD with the comparatively huge
> > HDD to make burst writes better (and have them committed to HDD later,
> > in times of low loads)? Linux supports this usecase better, but it
> > doesn't have a good filesystem for my usecase.
> >
>
> Hi,
>
> Thanks for using DragonFly.
>
> I believe our swapcache(8) is what you need.  Please read the nice
> swapcache(8) man page (http://mdoc.su/d/swapcache ), and you can find
> detailed description and examples.
>
> You're also welcomed to join the IRC (#dragonflybsd on EFNet) to ask more
> questions.
>
>
> Cheers,
> --
> Aaron
>
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