[pve-devel] [PATCH v2 docs] pct: section about suspend mode backups

Dietmar Maurer dietmar at proxmox.com
Wed Apr 13 18:49:14 CEST 2016


# git am thismail.eml
Applying: pct: section about suspend mode backups
error: patch failed: pct.adoc:430
error: pct.adoc: patch does not apply

Please can you rebase?

> On April 13, 2016 at 5:07 PM Wolfgang Bumiller <w.bumiller at proxmox.com> wrote:
> 
> 
> Mostly to point out the importance of the `tmpdir`
> setting...
> ---
>  pct.adoc | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/pct.adoc b/pct.adoc
> index 29c3529..7a38fb0 100644
> --- a/pct.adoc
> +++ b/pct.adoc
> @@ -430,6 +430,33 @@ Note that since with ZFS our storage uses default
> mountpoint paths and mounts
>  them into the container as bind-mounts the `acl` option has no effect on ZFS
>  mountpoints.
>  
> +
> +Suspend mode container backups
> +------------------------------
> +
> +When backing up running containers in suspend mode, take note that a
> temporary
> +storage location will be used, and that this location needs to be both large
> +enough as well as support all the file system related features used in the
> +container, like ACLs or extended attributes.  (Quotas are an exception to
> this,
> +as they use simple files.)
> +
> +Additionally the temporary location should be on a fast enough storage.
> +Preferably a local one as otherwise the container's data may end up being
> +transported over the network up to 4 times for a single backup (see the
> +description of the phases below for an explanation). Therefore it is
> recommended
> +to set the `tmpdir` variable in `/etc/vzdump.conf` to point to a suitable
> +location.
> +
> +- First the data that is to be included in the backup is copied via `rsync`
> +to the temporary location while the container is running.
> +- Then the container is suspended and a second `rsync` pass is performed in
> +order to make sure the backup will be in a consistent state, rather than a
> mix
> +of the states the container was in during the first copy pass. Afterwards the
> +container is resumed.
> +- Finally the contents are archived into a 'tar' file (which involves reading
> in
> +the contents, packing them, and writing them out into a file).
> +
> +
>  Container Advantages
>  --------------------
>  
> -- 
> 2.1.4
> 
> 
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