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vzdump.adoc: use continuations

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Dietmar Maurer 2016-04-14 06:42:05 +02:00
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@ -43,22 +43,23 @@ location (see option `--tmpdir`). Then the container is suspended and a second
rsync copies changed files. After that, the container is started (resumed)
again. This results in minimal downtime, but needs additional space
to hold the container copy.
+
When the container is on a local filesystem and the target storage of the backup
is an NFS server, you should set `--tmpdir` to reside on a local filesystem too,
as this will result in a many fold performance improvement.
Use of a local `tmpdir` is also required if you want to backup in `suspend`
mode a local container using ACLs to an NFS server.
+
For QemuServer, this mode will suspend the VM, start
a live backup, and resume the VM.
a live backup, and resume the VM. This does not require a temporary
storage.
`snapshot` mode::
For containers, this mode uses the snapshotting facilities of the
underlying storage. A snapshot will be made of the container volume,
and the snapshot content will be archived in a tar file.
+
For QemuServer, this mode will do a live backup similar to the
`suspend` mode, but without suspending/resuming the VM.