For DFHSM to be hung for so long, would lead me to suspect a problem with allocating the CDS Backup files.
Jacky, Are you backing up to tape? If YES, Is there a lot of concurrent tape activity? Are you submitting a Backvol CDS command separately from normal HSM operations? Is the time you submit the CDS Backup command in conflict with Backups or Space Mgt.? Allan, I find that CDS Backups run before my Incremental Backups but then I've always scheduled Backups before Secondary Space Mgt. Is it possible that HSM automatically backs up the CDS datasets before the first major automated process after midnight whether it is Primary or Secondary Space Mgt. or Incremental Backups if the CDSVERSIONBACKUP parameter is coded in Parmlib? I haven't found a clear description in the FMs. Dave O'Brien NIH Contractor ________________________________________ From: IBM Mainframe Discussion List [ibm-m...@bama.ua.edu] On Behalf Of Staller, Allan [allan.stal...@kbm1.com] Sent: Wednesday, March 04, 2009 10:04 AM To: IBM-MAIN@bama.ua.edu Subject: Re: DFHSM Issue - Critical BTDTGTTS, This is what has been colloquially known as a 'fatal embrace' and is not just limited to DFHSM. In my experience this has been caused by multiple HSM functions running in parallel with w/DFHSM CDS backup. The CDS backup enqueues exclusively and seperately on all three CDS's and the journal. If both (typically) backup and migrgration are running concurrently with the CDS backup, CDS backup can't get all of the datasets needed to complete. CDS backup is, however, designed to run concurrently with normal HSM operation. The simplest solution is to move the CDS backup to some other time of day. Note: Secondary space management will always take a CDS backup at the beginning of its cycle. HTH, <snip> 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 ? </snip> ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
