Forum Discussion

swatts7605's avatar
swatts7605
Level 0
9 years ago

Need help with tuning NetBackup data buffers (slow duplication jobs to tape)

Hi, I'm relatively new to NetBackup, but we're seeing slow performance, mostly with duplication jobs to our LTO5 tape library. Here's a summary of our setup: NetBackup v.7.6.0.3 Appliance...
7.6
Backing Up
Backup and Recovery
HP-UX
NetBackup
Troubleshooting
  • Marianne's avatar
    Marianne
    9 years ago

    .... waited for full buffer 49882 times, delayed 145940 times

     

    I don't think any kind of buffer tuning will help here - it seems that read speed from disk is very slow.

    Have you included the 4TB head unit in your de-dupe volume? If so , it will slow down the de-dupe performance.

    Please also have a look at this post :

     Slow Duplication and Replication Issue 
    and this one:
    NBU 5220 Performance 

Marianne's avatar
Marianne
Level 6
9 years ago

.... waited for full buffer 49882 times, delayed 145940 times

 

I don't think any kind of buffer tuning will help here - it seems that read speed from disk is very slow.

Have you included the 4TB head unit in your de-dupe volume? If so , it will slow down the de-dupe performance.

Please also have a look at this post :

 Slow Duplication and Replication Issue 
and this one:
NBU 5220 Performance