TempDB Best Practices For Shared Storage Microsoft recommends separating the SQL Data Files from the Temp Files to limit device contention but what about cases involving shared storage.  I have a shared environment where the data and temp files are located on the same mount point or LUN.  Is it best practice to separate them onto different?  Or will it make a difference from a performance standpoint?
There is no a definitive answer.
Anyway I suggest, if possible, to store tempdb files in different LUN. But it is worth only if tempdb is under pressure.

In my environment I use shared storage also for tempdb for performance reasons: my local disks are slower then shared storage via EMC.