My brain is no longer able to remember the change, but long ago a change to the management class would result in a recall if the data set was migrated. Yes, the VVDS does contain the management class information when on primary DASD, but once it is migrated, DFHSM stores the information. Again, I've been out of the trenches too long to remember the exact record within DFHSM, but there is a guide on the records. You would still need to create the list, regardless, but the ALTER should not bog the system down with thousands of recalls. Still, I would limit the number of ALTER commands issued.
Michael Spencer BMC Software -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Ted MacNEIL Sent: Tuesday, March 17, 2009 4:52 PM To: [email protected] Subject: Re: changing management class on about 10000 datasets >The ALTER command will not attempt to recall the data set. It does change the >management class in place. How? Please explain. The management class is stored in the VVDS, or in some HSM control block. Laspt I checked, ALTER didn't talk directly to HSM. - Too busy driving to stop for gas! ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
