将SQL Server tempdb文件分布到整个lun

Question

我已经阅读了很多关于在lun上分布tempdb和数据库文件以优化sql server的知识，我的问题是，如果我只有一个LUN，传播tempdb会产生任何积极的效果，还是最好请求额外的单独磁盘来获得性能好处？

Answer 1

Having more than one database file (no matter which database) on one single physical disk (LUN or not) does not provide improved performance most of the time.

Regarding tempdb, it will improve the performance if there is allocation contention. In that case you should create as many equally sized database files as the number of logical processors.

But if you can request more LUN's why to assign them to tempdb? Is tempdb so overloaded? Typically you will get better overall performance if the new LUN's is assigned to other databases.