vzdump.adoc: use continuations

[pve-docs.git] / vzdump.adoc

diff --git a/vzdump.adoc b/vzdump.adoc
index fc4246807b900fc5dd51aaa1ead6ab81b867a9a7..67ce1f3f2a35f479d66c229070614b7882d77fa8 100644 (file)
--- a/vzdump.adoc
+++ b/vzdump.adoc
@@ -38,21 +38,28 @@ Stop the VM during backup. This results in a very long downtime.
 
 `suspend` mode::
 
 
 `suspend` mode::
 

-For containers, this mode uses rsync to copy the VM data to a temporary
-location (see option `--tmpdir`). Then the VM is suspended and a second
-rsync copies changed files. After that, the VM is started (resumed)
+For containers, this mode uses rsync to copy the container data to a temporary
+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
 again. This results in minimal downtime, but needs additional space

-to hold the VM copy.
-
+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
 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.
 
 `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.
 
 For QemuServer, this mode will do a live backup similar to the
 `suspend` mode, but without suspending/resuming the VM.