Backup failing - 'System Call Failed (Code 11)'

[mccalia1]

I'm currently backing up a HP Server with 170GB, across an ethernet network to a HP Tape Library which is connected to an HP Server via SCSI. I have been tinkering with the server to improve the performance, following the NetBackup Performance Tips however, it seems that the backups are failing between 40-70GB.

I made the following changes before the backups started to fail:

1) Increased the Communications buffer to 64k (I did have it as 128k)
2) Created the following files: NUMBER_DATA_BUFFERS & NUMBER_DATA_BUFFERS_RESTORE and entered in 64 & 132096 respectively.

I seem to receive the ' System Call Failed (code 11) on failure.

According to the troubleshooting manual, it suggested the following:

1) Set the Initial Cached Size & Maximum Cache size to 0 to allow netbackup to use what is required.
2) Increase the virtual memory size (which is fine)
3) Verify there is enough space on the Veritas Install directory (which is fine)

I have thought about disabling OTM, as the server is not in use when the backup window is open, does anyone have any views if OTM is required if there is no active sessions connected and whether this could be causing my problem?

Also which Logs should I check for more information?

thanks for your help....

 

[Stumpr]

I would go back to your statement:
I made the following changes before the backups started to fail:

Many times while tweaking the
NUMBER_DATA_BUFFERS and SIZE_DATA_BUFFERS
I managed to generate status code = 11

I backed down on my agressive settings and the error code 11's went away.

Bob Stump
Incorrigible punster -- Do not incorrige

 

[mccalia1]

Thanks, I will try this.

However, this was a setting that Veritas Technical Services asked me to try to improve the performance so curious why this could not be used.

 

[Stumpr]

Veritas Technical Services asked me to try ......

It is a game of selecting the best overall servers.
It can get quite involved. But it is fun working it.
Please read the technote:
NET_BUFFER_SZ, SIZE_DATA_BUFFERS and NUMBER_DATA_BUFFERS - how they work and how to configure them

http://seer.support.veritas.com/docs/183702.htm

Check out the formula against the server resources.
You have to have enough resources or else the changes
can be bad.

Bob Stump
Incorrigible punster -- Do not incorrige