EV design thoughts
I'm looking for a couple of design thoughts on an EV solution exchange 2010 archiving across three sites.
Firstly these sites are global (UK, US and New Zealand) with a total of 15,000 mailboxes (two thirds in US and the remaining one third split evenly between UK and NZ.
A single EVsite with directory database in US?...... what would be the pros and cons of having an EVsite per territory?
The US has 10000 mailboxes so I'm thinking 3 x mailbox servers as opposed to 2? Plus 1 for journaling (approx 100,000 emails per day). Client also looking for e-discovery so a seperate server for DA? would an indexing server be suitable here??
UK and NZ have circa 2500 mailboxes each so only 1 mailbox server, 1 for journaling at each location and 1 for DA
Each site has local SQL clusters already so I'm planning a single VSG per territory with SIS sharing at group level. Is there a 'rule of thumb' on number of vault stores for 10000 mailboxes (US location) perhaps based on number of DAG members\databses? seperate vault store for Journal but still within the same VSG?
Any thoughts and ideas greatfully accepted.