Sitecore Field Experiences

Problem On another Sitecore field experience episode... we performed a Sitecore Upgrade from 8.0.5 to 8.2.5 , after that an issue was raised that Sitecore Analytics data and PathAnalyzer reports are not available (out of date/data missing), so we investigated and to make a long story short, based on log errors we identified some issues and after some Sitecore support tickets and research it was determined that we must Rebuild our Reporting database. That involves a dedicated Processing Server processing xDB (MongoDB) data replicated between 2 geographically separate data centers. Server had 32GB RAM, 8 Core CPU. Here's the problem discovered after running the RebuildReportingDB: Sitecore Processing Server taking an abnormally long time to process data  Projected time to process all data is 120 days (based on the History data in Analytics xDB) Server not optimally using dedicated resources Due to many reasons, we can't wait for 120 days. So... we worked with Siteco