That's a truly open ended question! There are tons of docs available - but the question is - who is not performing well and needs to be tuned to increase performance?
Tuning will vary based on:
- Type of duplication:
i.e. disk to disk, disk to tape, tape to tape
- Type of hardware.
- Type of operating system
- Location of storage being read from and written too
- Sometimes network bandwidth
Start with the basics - try to identify who is the bottleneck - is it read or write? See if you change the source or destination if the issue follows.
Review the buffer settings on your system. See the following for information:
Where are the values for SIZE_DATA_BUFFERS, NUMBER_DATA_BUFFERS and NET_BUFFER_SZ located on Windows NetBackup Servers?
http://www.symantec.com/docs/TECH19206
Check out the NetBackup Backup Planning and Performance Tuning Guide:http://www.symantec.com/docs/DOC4483
If using Advanced disk - see the AdvancedDisk Storage Solutions Guide
http://www.symantec.com/docs/DOC5149
There is a lot of information available and sometimes a little difficult to determine where to start. If in doubt - I would encourage you to open a case and ask the support org to help you identify where the bottle neck is so that you can determine what to tune a bit easier.
Unfortunately tuning normally requires trial and error to find the best values; so please don't expect a one answer fits all sort of thing. It takes a bit of time and patience.
Have a good day!
