Hi,  During the database upgrades or change in hotfixes we need to restart the Pega cluster. Since we have 52 nodes restart takes long time. So here, we try to write a script which can restart the cluster automatically. Normally when we want to stop a node we use kill -15 then we are checking the PegaRULES logs, if the node is closed pass to next step.  So our questions;  1) Have you ever written a script which can restart the whole cluster? If you have can you share with us or give us some hint?  2) After our business unit stops campaigns can we use kill -9 to stop nodes?  3) Can we stop the all nodes in one go? I mean how we can restart as quickly as possible?