How should we setup STU Pool on Data Domain? How does AIR want to see it? Does it matter?

We have Data Domains setup to replicate (AIR - NBU) from one site to another. When we setup STU Pools on the Data Domain, is there a specific way NetBackup wants to see these STU DD Pools? eg. Separate for Applications, DataBases, Data, NFS, etc. I guess bottom line is we want better performance from a recovery stance. We would want these pools to "orderly" read (perhaps write) to the disk. Please let me know your thoughts. (we need to get out of VTL).