Tests Database Mirroring...
One of the areas improved for SQL 2008 is database mirroring. Two of the improvements listed in Books Online that caught my eye are compression of data sent across the network (at least 12.5 % compression ratio according to books online), and "Write-ahead on the incoming log stream" on the mirror server. I decided to do some simple testing to see if these changes made a noticeable difference.
the full article is here : https://www.sqlservercentral.com/articles/Mirroring./65034/