Rate download decrease when truncate/prune volume before

[Inazo]

Hi,

I use bareos since one year now, and i'll made some configuration. Last month i try to create one volume per jobs to simplify the data retention and clarify management of the data in my process.

My standard config for all my client is something like this :

Pool {
  Name = myHost-Full
  Pool Type = Backup
  Recycle = yes                      
  AutoPrune = yes                   
  Auto Prune = yes                   
  Action On Purge = Truncate
  Volume Retention = 30 days       
  Maximum Volume Bytes = 50G    
  Maximum Volumes = 31             
  Label Format = "myHost-Full-" 
  Maximum Volume Jobs = 1
  Use Volume Once = yes
  Recycle Oldest Volume = yes
}

So when i have less than 31 volumes no problem my rate is like 2000 KB/s, great for me.

But when i have reach the 31 volumes, my rate decrease to 200 KB/s... But no reason... If i'll upgrade the Maximum Volumes to 32 the next time when it create the next Volumes the rate are again to 2000 KB/s.

So i'll think it's the Truncate/prune and recyle volume action that's disturbed the rate.

But how to avoid it and conserve my Maximum Volumes ? Or it's possible with bconsole to make the Recycle/truncate/prune before the jobs running like using a cron or other things.

Best regards,