Terry, Ignoring the obvious of assigning the correct SC and MC in the first place <grin>, IDCAMS is definitely faster and I have done "lots" before.
Another thought: Do you have any of the catalog recovery products from the ISVs? Some are 10 times faster than IDCAMS in doing the same function. CR+ from Mainstar/Rocket is one. Bob Richards -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Terry Bruns Sent: Wednesday, September 06, 2006 2:51 PM To: [email protected] Subject: Too many ALTERs? Hi All, Here's a weird one. The Storage folks where I work run batches of ALTERs to change Storage and Management classes for SMS managed data sets. Their current procedure calls for saving a list of data sets in ISPF 3.4, then editing the resultant list into ALTER control cards. One of them asked me to come up with a REXX exec to help create the control cards, because it was hard when the list was thousands of data sets long. But then she told me I had to keep each job down to 30 or less ALTERs because any more would bog the system down. Upon further investigation, I found that the batch job they use is actually batch TSO, not IDCAMS. I'm suspecting that using the ALTER TSO command under batch TSO may be the reason for the bogging and that using IDCAMS would produce different results as far as performance is concerned. Does anyone have any thoughts on this? Have any of you run into performance degradation when running too many ALTERs? LEGAL DISCLAIMER The information transmitted is intended solely for the individual or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this email in error please contact the sender and delete the material from any computer. Seeing Beyond Money is a service mark of SunTrust Banks, Inc. [ST:XCL] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
