Looks to me based on the calculations if it goes over a little more than 2 hours acceptable. What's acceptable to me might not be acceptable to others.
225 GB per hour, or 62.5 MB/s LTO2 drives can writes 70 ~75 MB/s It's difficult to PD without seeing the whole environment where the bottle neck is, but one area I would check woud be how LTO drives are assigned to HBA card(s) on TSM server. If you have fibre LTO drives, I would check how HBAs are assigned to LTO drives. For example, If you have 1 HBA assigned to LTO drive 1 and 2 another HBA assigned to LTO drive 3,4 When backup occurs, if tapes are mounted from each HBA: drive1 and drive 3, would have a greater performance than say you were to use drive1 and drive 2. Sung Y. Lee "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> wrote on 03/16/2006 06:46:40 AM: > Hi, > we use oracle TDP with LTO 2 dirvers for Rman database backup. > Normally, the backup for database (450G) take 2h with 2 channels. > but some time (intermittent) the backup take more than 2h30. > the problem is that in this case only on channel work fine but the > other is very slow, so when we do recovery test , the multiplexing not work. > any idea please ? > Thanks
