Scaling the Vault databases (good or bad)

We have Centera on the backend.  We have 300,000 messages a day with the potential for much more.  How many messages can a single Vault Store database handle?  That's 675 million messages in a six year retention period.  Can a single database handle that?  Will the performance of CA and DA be impacted by having 675 million messages in one vault store database.  Let's say I have four Exchange mailbox servers with users spead evenly across all four servers.  I think creating four Vault Store databases sounds like a reasonable choice.  The messages would be divided up between the four databases.  If I scale out the mailbox servers, I scale out the Vault Store databases.  A one for one match. 

 

Is there any negative impact to this idea when it comes to CA and DA?

 

Thanks,

 

Mike Niccum