Mainframe, MVS and zOS Discussion

We have a COBOL + DB2 setup and performance is mostly fine, but during peak hours, some jobs slow down drastically. How do you normally go about isolating DB2 performance issues in such cases? Is it usually access path-related or can something else be impacting it?

Thanks for the DITTO's link. You are very humble.

The only time I've used DITTO was many years ago, to copy a multi-reel unlabelled tape

What is " unlabelled tape"? I have searched for it on google but did not find some good references. Got this one:


Tape labeling with FATS

FATS can label up ...

Happy Diwali!

For me both light and clikcing on photo works. I'm using IE7 and Windows 7.

Thanks. But I did not get these two statements -

In order to rename that tape data set, the data set header would have to be rewritten. Since physically there may be a slight overlap with the data (no two tape drives are going to align one tape EXACTLY the same every time), that means the data ...

Hi,

Can we rename a tape dataset? I have been told that we can not rename a tape dataset, but why can't we do it?