IBM E16RMLL-I Implementation Guide - Page 728
Server quiesce, Backing up important components
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22.2.1 Server quiesce Before upgrading the server, the server instance should be as idle as possible. Consider the following: 1. Perform the scheduled upgrade during a period of little of no activity if possible. 2. Change the migration thresholds on the disk pools so as to move all the data to the tape pools before starting the upgrade. 3. Make a copy or your server options file, dsmserv.opt. 4. Disable the central scheduler (add DISABLESCHEDS YES to dsmserv.opt) 5. Cancel all remaining processes and sessions (issue the disable sessions command). 6. Add to the dsmserv.opt file EXPINTERVAL 0, which keeps expiration from running at startup. 7. Add to the dsmserv.opt file the NOMIGRRECL option, which keeps both migration and reclamation from running on the server at startup. Note that this is an undocumented command. 8. After you complete the upgrade, you can merge the original server options file to the current version, since some default options may have changed. 22.2.2 Backing up important components Now, when the server is idle, you may proceed with the preparation steps, as follows: 1. Back up your primary disk and sequential storage pools. 2. Back up your server database. 3. Back up device configuration file (devconfig). 4. Back up volume history (volhist). 5. Make a copy of the dsmserv.dsk files and keep it in a safe place, since it contains database and recovery log volumes' file names and locations. 6. Make a copy of the dsmserv.opt files and keep in safe place, as it contains all of your server instance options. Note that if you already made the recommended changes to the server options file as described in the previous section, you should already have saved a copy of the file. 7. Halt your server instance. 698 IBM Tivoli Storage Manager Implementation Guide
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