diff --git a/src/bin/proxmox-backup-client.rs b/src/bin/proxmox-backup-client.rs
index 7e2fcc2e..7c4a3257 100644
--- a/src/bin/proxmox-backup-client.rs
+++ b/src/bin/proxmox-backup-client.rs
@@ -25,6 +25,7 @@ use xdg::BaseDirectories;
 
 use lazy_static::lazy_static;
 use futures::*;
+use tokio::sync::mpsc;
 
 lazy_static! {
     static ref BACKUPSPEC_REGEX: Regex = Regex::new(r"^([a-zA-Z0-9_-]+\.(?:pxar|raw)):(.+)$").unwrap();
@@ -106,37 +107,34 @@ fn complete_repository(_arg: &str, _param: &HashMap<String, String>) -> Vec<Stri
 }
 
 fn backup_directory<P: AsRef<Path>>(
-    client: &mut HttpClient,
-    repo: &BackupRepository,
+    client: &BackupClient,
     dir_path: P,
     archive_name: &str,
-    backup_id: &str,
-    backup_time: DateTime<Local>,
     chunk_size: Option<u64>,
     all_file_systems: bool,
     verbose: bool,
 ) -> Result<(), Error> {
 
-    let mut param = json!({
-        "archive-name": archive_name,
-        "backup-type": "host",
-        "backup-id": backup_id,
-        "backup-time": backup_time.timestamp(),
-    });
-
-    if let Some(size) = chunk_size {
-        param["chunk-size"] = size.into();
+    if let Some(_size) = chunk_size {
+        unimplemented!();
     }
 
-    let query = tools::json_object_to_query(param)?;
+    let pxar_stream = PxarBackupStream::open(dir_path.as_ref(), all_file_systems, verbose)?;
+    let chunk_stream = ChunkStream::new(pxar_stream);
 
-    let path = format!("api2/json/admin/datastore/{}/pxar?{}", repo.store(), query);
+    let (tx, rx) = mpsc::channel(10); // allow to buffer 10 chunks
 
-    let stream = PxarBackupStream::open(dir_path.as_ref(), all_file_systems, verbose)?;
+    let stream = rx
+        .map_err(Error::from)
+        .and_then(|x| x); // flatten
 
-    let body = Body::wrap_stream(stream);
+    // spawn chunker inside a separate task so that it can run parallel
+    tokio::spawn(
+        tx.send_all(chunk_stream.then(|r| Ok(r)))
+            .map_err(|e| {}).map(|_| ())
+    );
 
-    client.upload("application/x-proxmox-backup-pxar", body, &path).wait()?;
+    client.upload_stream(archive_name, stream, "dynamic", None).wait()?;
 
     Ok(())
 }
@@ -440,20 +438,22 @@ fn create_backup(
 
     let backup_time = Local.timestamp(Local::now().timestamp(), 0);
 
-    let mut client = HttpClient::new(repo.host(), repo.user())?;
-
+    let client = HttpClient::new(repo.host(), repo.user())?;
     record_repository(&repo);
 
     println!("Starting backup");
     println!("Client name: {}", tools::nodename());
     println!("Start Time: {}", backup_time.to_rfc3339());
 
+    let client = client.start_backup(repo.store(), "host", &backup_id).wait()?;
+
     for (filename, target) in upload_list {
         println!("Upload '{}' to '{:?}' as {}", filename, repo, target);
-        backup_directory(&mut client, &repo, &filename, &target, backup_id, backup_time,
-                         chunk_size_opt, all_file_systems, verbose)?;
+        backup_directory(&client, &filename, &target, chunk_size_opt, all_file_systems, verbose)?;
     }
 
+    client.finish().wait()?;
+
     let end_time = Local.timestamp(Local::now().timestamp(), 0);
     let elapsed = end_time.signed_duration_since(backup_time);
     println!("Duration: {}", elapsed);