Andrew, Here, a snippet of the administrative command line online help "h mig stg" :
This command creates one or more migration processes that can be canceled with the CANCEL PROCESS command. The number of processes is limited by the MIGPROCESS attribute of the storage pool definition. To display information on background processes, use the QUERY PROCESS command. Your instructor should read his books again ... Cheers Arnaud ************************************************************************ ****** Panalpina Management Ltd., Basle, Switzerland, CIT Department Viadukstrasse 42, P.O. Box 4002 Basel/CH Phone: +41 (61) 226 11 11, FAX: +41 (61) 226 17 01 Direct: +41 (61) 226 19 78 e-mail: [EMAIL PROTECTED] ************************************************************************ ****** -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Meadows Andrew Sent: Tuesday, 27 November, 2007 21:01 To: [email protected] Subject: Mig stg question. Hello list. Environment . TSM 5.3.4.1 running on AIX. I have a question about the mig stg command versus the hi/lo parameter on a Disk Storage pool for migration purposes. I was recently in a TSM class and the instructor informed me that the mig stg command runs single threaded as compared to the upd stg command which will run multiple threads. Here is the theoretical situation I gave him. You have a disk pool. That is 10 GB. This disk pool has the Migration Processes parameter set to 2. Theoretically this disk is 50 % full with data from 2 nodes. And tyou have the tape drives available for migration to the Next Storage Pool to tape. Scenario 1. You issue the mig stg diskpool lo=0. This will kick off 2 processes.... 1 per node.... According to the instructor this is running on a single thread and moving the data at a slow rate. Scenario 2 You issue the upd stg diskpool hi=0 lo=0 This will kick off 2 processes .... 1 per node..... According to the instructor this is running one thread per process and moving the data in paralell. Has anyone seen this, or heard this? We are currently using the mig stg command and I wonder if we could be doing this more efficiently. Thanks, Andrew Meadows Storage Services Operations Enterprise Storage Services HCA Information Technology & Services
