Forum Discussion

sshagent's avatar
sshagent
Level 4
12 years ago

backups hanging

Is anyone experiencing lots of hung backups?   We're not using anything fancy, just regular backups to tape(or disk), no advanced features and such.  Linux master, media and clients.  Running 7.5.0...
7.5
Backup and Recovery
NetBackup
  • Mark_Solutions's avatar
    Mark_Solutions
    12 years ago

    There is a slight performance hit using CPR, but not huge.

    Every x(180) minutes it will want to perform a checkpoint and will prepare itself for that, but can only actually do it at file/folder boundaries - so it must finish backing up the file it is on before it can actually save the checkpoint.

    That is the reason i asked about the size / possible time that last listed file may take to back up.

    Assuming there are no firewalls etc. the only thing the 2 hours can be put down to, as far as i can see, is the keep alive timeout. The settings i gave earlier may well overcome that for you allowing you to maintain the 180 CPR. By default CPR is 15 minutes and most of my customers use 30 to 60 minutes.

    Perhaps having the CPR in excess of the 2 hour keep alive is the issue so it may be worth having at less that 120.

    Hope this helps

Mark_Solutions's avatar
Mark_Solutions
Level 6
12 years ago

There is a slight performance hit using CPR, but not huge.

Every x(180) minutes it will want to perform a checkpoint and will prepare itself for that, but can only actually do it at file/folder boundaries - so it must finish backing up the file it is on before it can actually save the checkpoint.

That is the reason i asked about the size / possible time that last listed file may take to back up.

Assuming there are no firewalls etc. the only thing the 2 hours can be put down to, as far as i can see, is the keep alive timeout. The settings i gave earlier may well overcome that for you allowing you to maintain the 180 CPR. By default CPR is 15 minutes and most of my customers use 30 to 60 minutes.

Perhaps having the CPR in excess of the 2 hour keep alive is the issue so it may be worth having at less that 120.

Hope this helps