It's a good idea to shuffle the cycles around. What I've done is use my storage management product to execute different schedules of recycles. At 6 AM the recycle is issued for everything that is zero percent full. This takes about 5 to 10 minutes to complete. At 6:30 recycle is issued for that days backups tapes to be recycled, beginning at five percent valid data and then moving up based on an incremental alert system that we've defined. The weekend is when ML2 is recycled along with the Saturday and Sunday daily backup tapes. The whole process is complete before 8 AM and we usually get up to everything with thirty percent valid data. The one item to remember is if you are duplexing your tapes, take into consideration the number of tape drives that will be required to perform the recycle and any other possible DFHSM tape activity such as recalls.
Michael Spencer -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Michael B Smith Sent: Tuesday, March 10, 2009 8:55 AM To: [email protected] Subject: Moving HSM RECYCLE to different LPAR in SYSPLEX I'm considering moving RECYCLE from my primary host to a secondary to offload some cycles from the primary. I'm running z/OS 1.8 on 3/4 LPARS in the prod sysplex and 1.10 on the 4th. Anyone tried this and fell in a ditch or were results as expected? Tips/Tricks? Any redbook,etc info in this area. We do of course, share HSM CDS's across the sysplex. ---------------------------------------------------------------------- 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
