TSM system migration We're in the beginning planning stages for a major transition in our TSM configuration. We've purchased all new hardware, Host and tape libraries and disk sub-system; so, I'm looking into the best practices for making the transition with as little disruption to ongoing production operations as possible. Any and all experiences from fellow TSM'ers is appreciated.
Backup window runs from 6pm to 6am. Daily TSM Administration jobs, expiration / migration / dbbackups / prepare runs from 6am-4pm. Data to migrate totals about 25TBytes. ======EXISTING CONFIGURATION All tapes are in libraries at all times - we have no tapes offline. TSM Host: One AIX p650 with 32G memory hosting a number of heavily used Oracle databases, TSM server and disk pools, and all tape libraries connected via SAN fabric. TSM Server version 5.3.1 2G fibre channel to Disks via SAN switch (zoned) is used for storage pools and large raw logical volumes for the Oracle databases. 1G fibre channel to 4 Tape Libraries via SAN switch (zoned) Onsite tapes libraries IBM 3583 with 4 SCSI LTO-1 drives and 40 tapes used for only AIX and Oracle node data. IBM 3583 with 6 fibre channel LTO-2 drives and 60 LTO-2 tapes only Windows and Lotus node data. Remote tapes libraries IBM 3583 with 4 SCSI LTO-1 drives and 40 tapes used for only AIX and Oracle node data. IBM 3583 with 6 fibre channel LTO-2 drives and 60 LTO-2 tapes used for only Windows and Lotus node data. Once per day each Onsite tape stgpool is copied to the remote tape stgpool via 'backup stgpool' process. Each library is a single stgpool. Clients: 95 Windows NT and 2000 servers with TSM 5.0, 5.02, 5.03 data access via 100M ethernet and some Gb-ethernet. 10 TDP for Lotus Notes via Gb-ethernet 12 IBM AIX 5.3 MR4 with TSM 5.3.x via 1Gb-fibre channel 1 IBM AIX 4.3.3.x server with TSM 4.3.x via 100Mb ethernet 15 user managed Oracle Database backups via 1Gb-fibre channel (not using TDP for Oracle nor RMAN) ======NEW CONFIGURATION TSM Host: AIX P520 with 8G memory only used for TSM backup server and disk pools and all tape libraries connected via new dedicated SAN fabric. SAN disks available for storage pool is 4.3T TSM Server version: 5.3.most recent 4G Fibre Channel to storage pool Disks via SAN switch (zoned) 4G Fibre Channel to 2 Tape Libraries via SAN switch (zoned) Onsite tape library IBM 3584 with 10 Fibre Channel LTO-2 drives and 140 tapes Offsite tape library IBM 3584 with 10 Fibre Channel LTO-2 drives and 140 tapes Clients all stay the same with two major exceptions; 12 IBM AIX 5.3 MR4 nodes with TSM 5.3.x via Gb-Ethernet rather then 1Gb-Fibre Channel 15 user managed Oracle Database backups via Gb-Ethernet rather then 1Gb-Fibre Channel (not using TDP for Oracle nor RMAN) Turn on Collocation? Since we want to maintain tape separation for AIX/Oracle and Windows/Lotus data it seems like at least 2 collocation groups are need for the primary sequential stgpool. ===============QUESTIONS What is the easiest, fastest, least disruptive method to move data from the 2 onsite tape libraries to the 1 new onsite library? One goal is to NOT disrupt the nightly backup window. Deferring the administrative window would be ok. The migration process could be done during 1 8-hour work window or it could be done over any number of days as long as daily backup and recovery is still available. It would be possible to connect one new 3584 with a few of its tape drives active without salvaging nics and Gbics from the existing configuration and thereby have both old and part of the new system active in parallel. Moving all onsite LTO-1 and LTO-2 tapes to the new 3584 library is another option; and then aging out the LTO-1's via 'move data' perhaps. Any methods and trade-offs for this would be appreciated. And then there is the issue of getting our data from the primary sequential storage pools to the copy storage pools in the offsite library. I figure to just use 'backup storage pool' to make that happen. The 2 libraries are connected via 2 4Gb-Fibre Channel SAN switches. The question is how will collocation on the primary affect this and will using many processes help or hurt future recovery processing from the copy pools? Thanks for your time, Larry Peifer AIX / Oracle / TSM System Administrator San Clemente, California
