onbar vs. ontape

Hello to all, I'm in the process of testing/configuring onbar. In our prod. env we are currently performing ontape backups on a 250+ gig database. The backup takes aprrox. 3 hrs 45 min. (single drive) to complete. In my test env, a little slower box, the ontape backup takes 4 hrs 6 min. (single tape drive) with a onbar backup to 2 tape drives (Quantam SDLT 320 Drives) taking 4 hrs 21 mins. to complete. Both 320 drives are on a separate scsi controller. I have played around with the onconfig parms but the parallel onbar still takes a little longer than the serial ontape backup. Any ideas why it may be longer? HPUX 11 9.21 FC5 (also performed the test on 9.40 FC2 with same results) onconfig parms: BAR_ACT_LOG /tmp/bar_act.log BAR_MAX_BACKUP 20 BAR_RETRY 5 BAR_NB_XPORT_COUNT 40 BAR_XFER_BUF_SIZE 31

Look at the duration of each individual dbspace. That will indicate the reason why your onbar backup is running as long as it is. I am guessing that you may need to split one or more dbspaces into smaller dbspaces in order to take advantage of onbar's parallel backup strategy. HTH. Clifton "Darren_Jaco...." <Darren_Jacobs@carmax.com> wrote: Hello to all, I'm in the process of testing/configuring onbar. In our prod. env we are currently performing ontape backups on a 250+ gig database. The backup takes aprrox. 3 hrs 45 min. (single drive) to complete. In my test env, a little slower box, the ontape backup takes 4 hrs 6 min. (single tape drive) with a onbar backup to 2 tape drives (Quantam SDLT 320 Drives) taking 4 hrs 21 mins. to complete. Both 320 drives are on a separate scsi controller. I have played around with the onconfig parms but the parallel onbar still takes a little longer than the serial ontape backup. Any ideas why it may be longer? HPUX 11 9.21 FC5 (also performed the test on 9.40 FC2 with same results) onconfig parms: BAR_ACT_LOG /tmp/bar_act.log BAR_MAX_BACKUP 20 BAR_RETRY 5 BAR_NB_XPORT_COUNT 40 BAR_XFER_BUF_SIZE 31