Cancelling HSM is really a bad thing. There are some things you can do to minimize the need for doing this.
1) Use automation to hold audit and recycle prior to the start of automatic backup. 2) Make sure you schedule primary and secondary migration to end prior to automatic backup. 3) Schedule automatic backup to start about a half an hour earlier on only one HSM task in the sysplex to give CDS backup a chance to finish before the HSM on the other LPARs kick in with automatic backup. Starting before midnight, say 11:30 would be better. 4) Make sure CDS backup and VTS reclaim do not run at the same time or backup the CDSs to DASD instead. 5) Implement record level sharing and convert the CDSs to using it. You can shrink your windows with concurrent processing at the same time you can spread the workload across the LPARs in the sysplex. Terry Traylor charlesSCHWAB TIS Mainframe Storage Management Remedy Queue: tis-hs-mstg (602) 977-5154 -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Jacky Bright Sent: Wednesday, March 04, 2009 7:47 AM To: [email protected] Subject: Re: DFHSM Issue - Critical But when DFHSM is hanging then even for 2 hours intermittently in response to QUERY ACTIVE command gets status CDS Backup in progress. When DFHSM is cancelled and restarted then backup completes in few minutes. Can CDS Backup run concurrently with other DFHSM operations ? Jacky On 3/4/09, Lizette Koehler <[email protected]> wrote: > > First, > The CDS, OCDS, Journal backups will quiesce DFHSM during that time. > Go back through SYSLOG and see when they start and stop. It just > might be normal processing and you just need to wait until the backups > of the CDS etal complete. > > How long do your backups take? Are you waiting long enough for the > backups to completed? > > You may need to open an issue with IBM on it if your backups are > taking too long. > > Lizette > > > > > > Hello, > > > > Since last 2-3 days observing very strange behaviour of DFHSM. In > > the midnight DFHSM is not responding to any migration and recall > > request. Its started task DFHSM is not taking any CPU. > > > > But it was responding to all DFHSM QUERY commands. Tried cancelling > ACTIVE > > REQUESTS using CANCEL USER and CANCEL DATASET , CANCEL REQUEST > > commands. > > But not a single request got cancelled. But most of the waiting > > requests were cancelled. > > > > Finally we had to CANCEL the DFHSM started task and Restarted and > > then it started working fine. > > > > Also observed that this issue occurred when CDS backup process was > running. > > In the QUERY ACTIVE output could see that ARC0142I CDS BACKUP, > > CURRENTLY > IN > > PROCESS > > > > I am not able to see any error messages. Probably my brain stopped > > working. Any idea on this ? > > > > > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- 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
