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From: Dennis Schridde <devurandom@gmx.net>
To: LVM general discussion and development <linux-lvm@redhat.com>
Cc: Zdenek Kabelac <zkabelac@redhat.com>
Subject: Re: [linux-lvm] cache_check --clear-needs-check-flag does not clear needs_check flag?
Date: Wed, 09 Dec 2020 20:06:41 +0100	[thread overview]
Message-ID: <5900102.lOV4Wx5bFT@monk> (raw)
In-Reply-To: <a2927a4a-006e-6b5b-3597-d7b592e21ec7@redhat.com>


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Hello Zdenek!

Thank you for your reply!

On Mittwoch, 9. Dezember 2020 12:05:13 CET Zdenek Kabelac wrote:
> Dne 06. 12. 20 v 22:01 Dennis Schridde napsal(a):
> > The live system I am running these commands from is a Fedora 33:
> >
> > $ uname -a
> > Linux localhost-live 5.8.15-301.fc33.x86_64 #1 SMP Thu Oct 15 16:58:06 UTC
> > 2020 x86_64 x86_64 x86_64 GNU/Linux
> >
> > $ sudo lvm version
> >
> >     LVM version:       2.03.10(2) (2020-08-09)
> >     Library version: 1.02.173 (2020-08-09)
> >     Driver version:   4.42.0
>
> It seems you are using  'cvol' instead of 'cpool' solution which has been
> evolving and you will need a newer lvm2 version.
>
> If you want to using caching with the version of lvm2 you have - you will
> need to use cpools  (which are a bit faster anyway).

2.03.10 is the latest released version of lvm2.  So I would have to use the
Git main branch instead?

A bit confusing is that the lvmcache(7) manpage of lvm2 2.03.10 suggests to
create a cachevol as the first option:
$ lvconvert --type cache --cachevol fast vg/main

Should this be adjusted, if cachevols are not yet fully supported in 2.03.10?

How would you proceed to repair this cache?  I can recreate it as a cachepool,
but first I need to gain back access to the data, i.e. get into a state where
I can --uncache.

--Dennis

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  reply	other threads:[~2020-12-09 19:08 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-06 21:01 Dennis Schridde
2020-12-08 22:19 ` Dennis Schridde
2020-12-09 11:05 ` Zdenek Kabelac
2020-12-09 19:06   ` Dennis Schridde [this message]
2020-12-09 19:30     ` David Teigland
2020-12-09 19:57       ` Dennis Schridde
2020-12-09 20:45         ` David Teigland
2020-12-09 23:52           ` David Teigland
2020-12-09 20:15       ` Dennis Schridde

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