In a recent interview when the interviewer asked interview that TempDB can be moved to a different drive, the candidate was extremely surprised. For the benefits of the interviewee who did not know the answer, I have written this blog post.
Question: How to move TempDB to another drive?
There are major two reasons why TempDB needs to move from one drive to other drive.
1) TempDB grows big and the existing drive does not have enough space.
2) Moving TempDB to another file group which is on different physical drive helps to improve database disk read, as they can be read simultaneously.
Follow direction below exactly to move database and log from one drive (c:) to another drive (d:) and (e:).
Open Query Analyzer and connect to your server. Run this script to get the names of the files used for TempDB.
USE TempDB GO EXEC sp_helpfile GO
Results will be something like:
name fileid filename filegroup size
——- —— ————————————————————– ———- ——-
tempdev 1 C:Program FilesMicrosoft SQL ServerMSSQLdatatempdb.mdf PRIMARY 16000 KB
templog 2 C:Program FilesMicrosoft SQL ServerMSSQLdatatemplog.ldf NULL 1024 KB
along with other information related to the database. The names of the files are usually tempdev and demplog by default. These names will be used in next statement. Run following code, to move mdf and ldf files.
USE master GO ALTER DATABASE TempDB MODIFY FILE (NAME = tempdev, FILENAME = 'd:\datatempdb.mdf') GO ALTER DATABASE TempDB MODIFY FILE (NAME = templog, FILENAME = 'e:\datatemplog.ldf') GO
The definition of the TempDB is changed. However, no changes are made to TempDB till SQL Server restarts. Please stop and restart SQL Server and it will create TempDB files in new locations.
Reference: Pinal Dave (https://blog.sqlauthority.com)