[mylvmbackup] Re: xfs_freeze

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Hi James,

thanks for your message!

James Beal wrote:

> I think it would be better if we use xfs_freeze while making snapshots,
> from the manual.
> 
> "xfs_freeze halts new access to the  filesystem  and  creates  a  stable
> image  on disk.  xfs_freeze is intended to be used with volume managers
> and hardware RAID devices that support the creation of snapshots."
> 
> This is a patch which adds support for xfs_freeze, I wasn't sure how to
> work out the data location from the other options so I added dataroot as
> an option as well although xfs_freeze works if you supply a file on the
> filesystem and not just the mount point, it wouldn't work if mysql was
> spread accross multiple filesystems. Just a sugggestion anyway.

Thanks for the suggestion! I have to read up on this and take a closer
look at your patch before I can comment. As far as I understand it, one
has to run "xfs_freeze -f" prior to creating the snapshot, correct? I
somehow thought that there are kernel hooks between LVM and XFS that
perform this operation automatically - I have to do some research about
this first.

Bye,
        LenZ
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 Lenz Grimmer <lenz@xxxxxxxxxxx>                             -o)
 [ICQ: 160767607 | Jabber: LenZGr@xxxxxxxxxx]                /\\
 http://www.lenzg.org/                                       V_V
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