What are your specific performance requirements for your end users? For example:
What end user response times are acceptable?
Can you tolerate a possible degradation in performance during peak load times?
What configuration do you plan to use for your deployment? Calendar Server configuration scenarios include:
Single Calendar Server instance
Single front-end server with single back-end database server
Multiple front-end/back-end servers using LDAP CLD plugin
High Availability (HA) configuration
If you plan to configure multiple front-end servers, how do you plan to distribute your end users?
If you plan to configure multiple back-end database servers, how do you plan to distribute your database? For example, you could distribute servers geographically.
What plans do you have for growth? For both front-end and back-end servers?