Update shell-and-data-access.md

docs.it4i/general/shell-and-data-access.md

@@ -172,8 +172,10 @@ local $ rsync -r my-local-dir username@cluster-name.it4i.cz:directory
 ### Parallel Transfer
 
 !!! note
-    The data transfer speed is limited by the single-core ssh encryption speed to about **250 MB/s** (750 MB/s in case of aes256-gcm@openssh.com cipher)
-    Run **multiple** instances for unlimited transfers
+    The data transfer speed is limited by the single TCP stream and single-core ssh encryption speed to about **250 MB/s** (750 MB/s in case of aes256-gcm@openssh.com cipher)
+    Run **multiple** streams for unlimited transfers
+
+#### Many Files
 
 Parallel execution of multiple rsync processes utilizes multiple cores to accelerate encryption and multiple tcp streams for enhanced bandwidth.
 First, set up ssh-agent single sign on:
@@ -194,6 +196,20 @@ local $ ls | xargs -n 2 -P 4 /bin/bash -c 'rsync "$@" username@cluster-name.it4i
 The **-n** argument detemines the number of files to transfer in one rsync call. Set according to file size and count (large for many small files).
 The **-P** argument determines number of parallel rsync processes. Set to number of cores on your local machine.
 
+Alternatively, use HyperQueue. First get HyperQueue binary, then run:
+
+```console
+local $ hq server start &
+local $ hq worker start &
+local $ find my-local-dir -type f | xargs -n 2 > jobfile
+local $ hq submit --log=/dev/null --progress --array --each-line jobfile \
+        bash -c 'rsync -R $HQ_ENTRY username@cluster-name.it4i.cz:mydir'
+```
+
+#### Single Very Large File
+
+### Data Transfer From Windows Clients
+
 On Windows, use the [WinSCP client][c] to transfer data. The [win-sshfs client][d] provides a way to mount the cluster filesystems directly as an external disc.
 
 ## Connection Restrictions