I am intending to buy avast for cluster, but I have cluster with 5 node, and I only buy licsence for 1 server, If I install on 1 node, can I use it on all nodes, or is there a way to configure 1 node to use avast other nodes still using clamav ?
The config '/etc/pmg/pmg.conf' is shared with all nodes so if you configure avast only on one node it will still be called on all nodes.
As far as I remember the scanning still works with ClamAV - but you'll get warning and error messages in the logs of the systems where it's not activated
Additionally only a part of your mail traffic will benefit from Avast....