I am looking to rebuild the current webfarm setup where I work. Currently we have 4 regions. Each region has 3 WFE's on a ViP. Each of the three has a separate implementation of IIS 7.5 and ColdFusion 9.
Whenever a change needs to be made in IIS, we have to make it on all three servers (we are not currently using shared config). Additionally, we use DFS to replicate from the share to the WFE's (hub and spoke), which uses an enormous amount of storage.
I am tasked with rebuilding the environment in a way that is easier to manage and maintain. I am thinking of doing a shared config on the WFE's with virtual directories tied back to a single content share. While this saves on storage, it provides a single point of failure which is a problem.
Does anyone have any advice on IIS best practices in a large environment like this?