Today we are updating the SharePoint Boundaries and Limits document on TechNet with larger content database size limits and we are clarifying the value in Remote Blob Storage (RBS). With these changes to the SharePoint software boundaries the discussion of scale limits moves to other areas such as appropriate hardware, SQL Server configuration, disk IO bandwidth, planning and pre-production testing.
Full details are on the SharePoint team blog here. Key changes:
As part of the work required to increase these limits we have completed scale lab testing with a SharePoint farm with two content databases with a total of 30 TB of data across 120 million items. A report on this scale lab will be published in the near future.
Feel free to post a comment on this blog if you have any questions about this and I'll answer them.