Beware of Windows clusters
Junior colleague in a global trading bank was tasked to patch a Windows server cluster. Howls of outrage erupted when the concluding reboot revealed that the patched node was active, and not the standby he had assumed. Chastened by the deluge of constructive criticism, he promised to take more care in future.
A resolution he put into practice an hour later by carefully patching the node he now knew to be passive. If only the cluster hadn't responded to his first intervention by dutifully failing over. More howls ensued and or SLA was well and truly shot.
Biting the hand that feeds IT
