From: Erwin van Londen <erwin@erwinvanlonden.net>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] move dm-integrity metadata to another PV
Date: Mon, 05 Apr 2021 10:59:46 +1000 [thread overview]
Message-ID: <c9f3d5c03f27e73c11ec6a033d09c49eda26564c.camel@erwinvanlonden.net> (raw)
In-Reply-To: <20210404181856.6hevvwxwyflsm373@helios>
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Maybe an idea to add a cache volume to the LV?? Not 100% sure if this
works but would be nice to try.
On Sun, 2021-04-04 at 20:18 +0200, Sebastian Bachmann wrote:
> Hello,
>
> I played around with the new dm-integrity integration in lvm.
> Unfortunately, it
> is very slow, as the checksums has to be written and read on - which
> is the
> price to pay obviously.
>
> I thought that it might be a good idea to move the metadata to a fast
> disk,
> i.e., a SSD, however that is not possible and I get an error message
> on pvmove:
>
> # pvmove -n r10_int_rimage_0_imeta /dev/sdd /dev/sda2
> Unable to pvmove device used for raid with integrity.
>
> I could not find a reason why this should not be done in theory, thus
> I guess
> that this is simply not supported by LVM right now?
> Or is there another reason why you should keep the metadata always on
> the same
> device?
>
> Best,
> Sebastian
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://listman.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
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next prev parent reply other threads:[~2021-04-06 11:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-04 18:18 [linux-lvm] move dm-integrity metadata to another PV Sebastian Bachmann
2021-04-05 0:59 ` Erwin van Londen [this message]
2021-04-05 15:08 ` David Teigland
2021-04-05 15:40 ` Sebastian Bachmann
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