From: Nicholas Geovanis <nickgeovanis@gmail.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] swap on thin-provisioning
Date: Sun, 29 Nov 2020 10:19:40 -0600 [thread overview]
Message-ID: <CAJmb-Y=7djEwLUHO--ecLi0wenE9TznM4g+201XaOuH=g9tWrQ@mail.gmail.com> (raw)
In-Reply-To: <608365664c2a18db4e756f524c0e76da@assyoma.it>
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IIRC at VMWare vSphere 5 and before, swap could not be located on their
type of thin logical volume. Nor could it swap to a linux LVM volume on top
of that.
It just couldnt perform well. That later changed.
On Sun, Nov 29, 2020, 6:53 AM Gionatan Danti <g.danti@assyoma.it> wrote:
> Il 2020-11-29 01:18 Chris Murphy ha scritto:
> > What about a swapfile (on ext4 or XFS) onr a thin volume? In this
> > case, I'd expect fallocate would set the LE to PE mapping, and it
> > should work. But does it work for both paging and hibernation files?
>
> If things did not change, fallocate does *not* allocate PE space (ie:
> they are not passed down to the underlying thin pool).
>
> Moreover, I expect for a memory-starved machine to page out pool
> metadata (right?) so I would not use a thin volume for swap.
>
> Regards.
>
> --
> Danti Gionatan
> Supporto Tecnico
> Assyoma S.r.l. - www.assyoma.it
> email: g.danti@assyoma.it - info@assyoma.it
> GPG public key ID: FF5F32A8
>
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>
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prev parent reply other threads:[~2020-11-30 7:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-29 0:18 [linux-lvm] swap on thin-provisioning Chris Murphy
2020-11-29 12:52 ` Gionatan Danti
2020-11-29 15:12 ` Sreyan Chakravarty
2020-11-30 8:39 ` Gionatan Danti
2020-11-29 16:19 ` Nicholas Geovanis [this message]
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