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xen-users
Re: [Xen-users] Bad experience in mounting a domU disk
Hi, I am studying XEN for a project and I am trying to answer similar questions. Currently, I think NFS "partition" and/or libvirt based application.
Best regards,
--- En date de : Mer 4.6.08, Alain Barthe <ab266061@xxxxxxxxx> a écrit :
De: Alain Barthe <ab266061@xxxxxxxxx>
Objet: Re: [Xen-users] Bad experience in mounting a domU disk
À: xen-users@xxxxxxxxxxxxxxxxxxx
Date: Mercredi 4 Juin 2008, 17h47
2008/6/4 Rafał Kupka < rkupka+Listy.Xen@xxxxxxxxxxxxx>:
On Wed, Jun 04, 2008 at 11:00:43AM +0200, Alain Barthe wrote:
Many journalled filesystems do replay journal even if mounted with 'ro'
option. XFS has norecovery option to truly read-only disk access.
Similar option has been recently added to ext3.
I think that the best approach is to take LVM snapshot of domU
filesystem and then mount (with journal replayed) that snapshot.
Thanks Rafal and Javier for your explanation, I begin to understand what happened. The ext3 fs has the option "noload" to disable the load of the journal. I looked for something like "nocache" to disable the cache, but it appears not to exist.
My goal in mounting the filesystem of a alive domU is to monitor it (content of key files, free space, etc) in a non intrusive manner. Dealing with LVM snapshot is not obvious as we have no place enough for that.
Does somebody have a similar need ? Thanks again. Alain.
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