Restore in DR site is very slow
Production side: TSM Server: 5.3.3 on AIX 5.3 Tape Library: 3584 with 8 LTO3 drives DB2 database: 8.2, 1.2TB with 7 backup drives, backup time 1.2 hour offisite copy, 2 processes, with 4 drives. DR site: TSM Server: 5.3.3 on AIX 5.3 Tape Library: 3584 with 4 LTO3 drives My problem is, when I did twice restore test, the first time it used 4 drives to do restore, used 5 hours to restore. The second test, it only used 2 drives to do restore and it used 12 hours. My question is, how can I ensure the restore can constantly use 4 drives to do restore? TIA.
Fw: Restore in DR site is very slow
Increase the number of processes used for the offsite copy. With only 2 processes, you have 2 target tapes, so the data may only be on 2 tapes in the copypool. If you use more processes, you're more likely to have the data spread across more tapes. Nick Cassimatis - Forwarded by Nicholas Cassimatis/Raleigh/IBM on 07/28/2006 08:31 AM - ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU wrote on 07/28/2006 07:54:05 AM: Production side: TSM Server: 5.3.3 on AIX 5.3 Tape Library: 3584 with 8 LTO3 drives DB2 database: 8.2, 1.2TB with 7 backup drives, backup time 1.2 hour offisite copy, 2 processes, with 4 drives. DR site: TSM Server: 5.3.3 on AIX 5.3 Tape Library: 3584 with 4 LTO3 drives My problem is, when I did twice restore test, the first time it used 4 drives to do restore, used 5 hours to restore. The second test, it only used 2 drives to do restore and it used 12 hours. My question is, how can I ensure the restore can constantly use 4 drives to do restore? TIA.
Re: Fw: Restore in DR site is very slow
Thanks for your reply Nick. That's the good point. I am wondering, I did not change anything, why the first time, it used 4 drives but the second time only used 2 drives. On 7/28/06, Nicholas Cassimatis [EMAIL PROTECTED] wrote: Increase the number of processes used for the offsite copy. With only 2 processes, you have 2 target tapes, so the data may only be on 2 tapes in the copypool. If you use more processes, you're more likely to have the data spread across more tapes. Nick Cassimatis - Forwarded by Nicholas Cassimatis/Raleigh/IBM on 07/28/2006 08:31 AM - ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU wrote on 07/28/2006 07:54:05 AM: Production side: TSM Server: 5.3.3 on AIX 5.3 Tape Library: 3584 with 8 LTO3 drives DB2 database: 8.2, 1.2TB with 7 backup drives, backup time 1.2 hour offisite copy, 2 processes, with 4 drives. DR site: TSM Server: 5.3.3 on AIX 5.3 Tape Library: 3584 with 4 LTO3 drives My problem is, when I did twice restore test, the first time it used 4 drives to do restore, used 5 hours to restore. The second test, it only used 2 drives to do restore and it used 12 hours. My question is, how can I ensure the restore can constantly use 4 drives to do restore? TIA.
