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multiple copies - file count unequal

verbose5
Level 4
I've begun experimenting with the Multiple Copies option in the Schedules in my NB5.1mp3 environment as an alternative to Vaulting. I write two copies of a job to two different tapes in two different Volume Pools. The Activity Monitor show the pair of jobs plus a third that apparently just positions tapes. The pair finishes successfully and shows equal KB's Written, but different Numbers of Files Written. Is something wrong?
3 REPLIES 3

Ranjith_Kumar
Level 3
Hi,

No need to get confuse abt this 3rd active job. Actually the multiple backup works according to the below

When the backup is initiated thru manually/scheduled. The first active thread starts & this is responsible for initiating the copy 1 & copy 2 of the backup with two differnt volumepool tapes.

Once both the backup copies completed successfully , the initiator active job thread will also shows completed succesfully in the activity monitor.

If one copy fails & other copy completes successfully , the initiator thread will show status 1 " paritially successfull".

Hope it is clear for u , if you have any queries plz post it

Rgds
Ranjith Kumar. J
Veritas Netbackup 5.0 Certified specialist

Stefan_Schmid_2
Level 4
Hi,

We have exactly the same issue (different numbers of files written) in our NB5.1mp3a environment. However, not all backups have the
iusse, only a strong minority.

In one case I did a 'verify` on both of the copies and the result was fine. In addition, I compared the file list of copy 1 and copy 2 as
the verify command logged the file lists to a directory in /usr/openv/logs/user_ops. Result: No difference.

kind regards

Stefan Schmid

Martin_Rohrbach
Level 3
Well, I was told just lately that ITC does not create one stream of data from the client to the media server and that is then split up to go to multiple tapes.

Rather than that, it creates two streams from the client to the media server(s). So from the clients perspective, this probably looks like two simultaneous backups. And if the server is busy enough it is quite possible that the two instances of the client see different numbers of files ...

Martin