opc.three (1/10/2013)
. Online index rebuilds do not block anything regardless of the isolation level.
Kinda...
Online index rebuilds are mostly online. They take a short-lived IX lock at the beginning (which blocks writers) and a short-lived Sch-M lock at the end (which blocks everything)
I guess "Mostly Online Index Rebuilds" wasn't acceptable to marketting
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability