Hi all,
> Am 21.03.2019 um 11:24 schrieb Matt Churchyard via freebsd-virtualization
> :
> I'd also be intrigued to know what the logic in FreeNAS is for it. It is
> simply a case of "(arc = total_ram - guest_allocated)"?
> Is there a lower limit based on a percentage or total RAM, and/or a hard
> >
> > > 1. Does ARC actually cache zfs volumes (not files/datasets)?
> >
> > Yes it does.
>
> I find this distinction between volumes/files/etc and what is cached
> causes confusion (as well as "volumes not datasets").
>
> Both ZVOLs and Z file systems are types of dataset. A dataset stores
Matt Churchyard wrote:
> >
> > > 1. Does ARC actually cache zfs volumes (not files/datasets)?
> >
> > Yes it does.
>
> I find this distinction between volumes/files/etc and what is cached
> causes confusion (as well as "volumes not datasets").
>
> Both ZVOLs and Z file systems are types of
On Tue, Mar 19, 2019 at 3:07 AM Patrick M. Hausen wrote:
> Hi!
>
> > Am 19.03.2019 um 03:46 schrieb Victor Sudakov :
> > 1. Does ARC actually cache zfs volumes (not files/datasets)?
>
> Yes it does.
>
> > 2. If ARC does cache volumes, does this cache make sense on a hypervisor,
> > because guest
Hi Matt,
> Am 20.03.2019 um 10:34 schrieb Matt Churchyard :
>>> 2. If ARC does cache volumes, does this cache make sense on a
>>> hypervisor, because guest OSes will probably have their own disk cache
>>> anyway.
>>
>> IMHO not much, because the guest OS is relying on the fact that when
>> it
Hi!
> Am 20.03.2019 um 02:52 schrieb Victor Sudakov :
> Is SLOG also used by zfs volumes?
Yes, but for synchronous writes only, if I’m not mistaken.
So fundamentally yes, but in most cases no.
Patrick
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Patrick M. Hausen wrote:
>
> > 1. Does ARC actually cache zfs volumes (not files/datasets)?
>
> Yes it does.
I find this distinction between volumes/files/etc and what is cached causes
confusion (as well as "volumes not datasets").
Both ZVOLs and Z file systems are types of dataset. A dataset
Patrick M. Hausen wrote:
>
> > 1. Does ARC actually cache zfs volumes (not files/datasets)?
>
> Yes it does.
>
> > 2. If ARC does cache volumes, does this cache make sense on a hypervisor,
> > because guest OSes will probably have their own disk cache anyway.
>
> IMHO not much, because the
Hi!
> Am 19.03.2019 um 03:46 schrieb Victor Sudakov :
> 1. Does ARC actually cache zfs volumes (not files/datasets)?
Yes it does.
> 2. If ARC does cache volumes, does this cache make sense on a hypervisor,
> because guest OSes will probably have their own disk cache anyway.
IMHO not much,
Dear Colleagues,
I have a FreeBSD 11.2 system with 32G RAM which I'm going to use as a
bhyve host with zvols and sparse zvols, with (almost) no
services/daemons of its own.
Could you please clarify some points for me?
1. Does ARC actually cache zfs volumes (not files/datasets)?
2. If ARC does
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