“Maximum I/O streams per volume” with Disk Pools

[PD001]

where is the setting for e “Maximum I/O streams per volume” with Disk Pools in Netbackup?

Pat

[chashock]

If you mean the Limit I/O Streams setting, it is under the properties of a Disk Pool.

[PD001]

Thanks, I'm looking at NetBackup 7.5 Best Practice – Using Storage Lifecycle Policies document and see the following. I have one disk pool setup with one volume. the "Mazimum I/O Streams" setting is 95. I have one Storage Unit, which has the "Maximum Concurrent Jobs Count set at "25", so should my  "Mazimum I/O Streams" be set at 25 too?

When you enable the Maximum I/O streams per volume option on the Disk Pool the default number of 
streams is 2. Although the optimal number of streams per volume will vary depending on the disk type, a 
general guide line to minimize contention would be to divide the maximum concurrent jobs count for all 
the storage units using the disk pool by the number of volumes in the disk pool. 

[Mark_Solutions · Accepted solution]

The maximum jobs count does not include duplication, replication of restore operations so keep the I/O streams higher than the jobs count setting in order to have other things possioble during backup times.

So probably a setting of 30 would be fine if your jobs is set to 25

Only time and testing will show what works best for you in your environment for these two values