Netbackup Tapes Written Report vs Opscenter Client Data size report

[Sid1987]

Hi Team,

  I am trying to understand which report to rely on. There is a discrepancy in what I get when I select a date range of 1 month in Reports-->Tape Reports--> Tapes Written it gives me a report when I sum it up it is different from what I get when a run a custom report for Client Backup Size Summary (Job wise). Which one would tell me how much data I have backed up for entire month? Because I believe Tape Written report will give me less data as if one media is used twice in the same month then if would report only once in the report with latest data written size. Moreover it will be retention depended by that I mean if a media is expired and then used for some other backup the report won't give me preivious expired data. Am I correct in my understanding?

[Sid1987]

Any reply to support my understanding?

[Marianne · Accepted solution]

Seems our OpsCenter experts are no longer visiting here on a regular basis.

My 2c: 

I would run both reports from the same interface. Either OpsCenter or NBU reports - not using one for a particular report and another interface for the other report. 

I am not an OpsCenter expert, but my understanding is that information in OpsCenter db does not expire the way image expiration works on NBU master server. 

Both Client Backups and Tapes Written report in NBU master will run bpimagelist command in the background and therefore rely on valid, unexpired images. 

Reports in OpsCenter will probably report expired and unexpired images. 

[Will_Restore]

Not an expert either but that is my understanding - Netbackup reports are current where OpsCenter data is aggregate.