Typically, a site will completely drain their cachepool before nightly backups run. To do this, create an admin schedule that lowers the thresholds to highmig=0 lowmig=0. This will fire migration processes and continue to run them until all of the data has been migrated. If caching is enabled on the pool the end result will show via a q stg operation cachepool with %Utilized 99% and %migratable 0%. Once migration has finished be sure to set the thresholds back to 90 and 70 or data will go directly to tape. So either script this so that one script does both (while waiting for migration to complete), or have another admin schedule that runs sometime later to reset the thresholds.
An even better way is to lower to 0 0, then immediately update again to 90 0 (migration will continue since it started) and then sometime later set low back to 70. Update stg cachepool highmig=0 lowmig=0 migproc=4 (number of tape drives you want to use) Update stg cachepool highmig=90 lowmig=0 Sometime later Update stg cachepool highmig=90 lowmig=70 After doing this, if you are still having migration run during your backups you need to make your pool larger by adding volumes to it. Kelly J. Lipp VP Manufacturing & CTO STORServer, Inc. 485-B Elkton Drive Colorado Springs, CO 80907 719-266-8777 [EMAIL PROTECTED] -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Gregory Lynch Sent: Tuesday, April 10, 2007 1:43 PM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Migration process Hello All, I have noticed that migration has been kicking off during the backup window and is slowing down the nightly backups. We have migration running during the day via an admin schedule for a hour, but the diskpool never seems to get below 70%. I checked the properties of the diskpool and the thresholds were 90 and 70, which right off the bat I think is too high. What is the best practice for running migration. If it runs longer, will it interfere with other processes like reclamation during the day? Thanks Greg *************************************************************** Gregory Lynch Lead Programmer Analyst IT Infrastructure/Systems Administration Stony Brook University Medical Center HSC Level 3, Room 121 ZIP 8037 Phone: 631-444-9783 [EMAIL PROTECTED] This e- mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by e-mail and destroy all copies of the original.
