I'm running an AWS Load Balancer with Web Servers at different Data Centres.
I need to start using PHP Sessions on Elasticache to Centralize Session Management.
I can create an a 2 node Elasticache setup with one node in each data centre but I'm concerned that there will be an impact to speed if cache data needs to be access on a cache server that is in the opposite data center to the requesting web server.
Is this the case? Or is there no or very minimal impact to speed?