diff --git a/global_config.yaml b/global_config.yaml
index 025bd60..5bdb6f0 100644
--- a/global_config.yaml
+++ b/global_config.yaml
@@ -4,7 +4,7 @@
 
 # parameters for vm2vm test
 CMP_HOSTS: []
-image_name: "Ubuntu-18.04"
+image_name: "cvp.ubuntu.2004" # Use Ubuntu 20.04 LTS image
 flavor_name: 'spt-test'
 flavor_ram: 1536
 flavor_vcpus: 1
@@ -16,5 +16,6 @@
 internet_at_vms: 'true' # whether Internet is present at OpenStack VMs and iperf can be installed with apt
 iperf_deb_package_dir_path: '/opt/packages/'
 iperf_time: 60 # time in seconds to transmit for (iperf -t option)
+multiple_threads_number: 10
 ssh_timeout: 500
 skipped_nodes: []