I'm working with a new netbackup installation, and I'm having difficulties understanding how the accelerator works in the specific case I have.
The client system is an AIX 7.1 server, and we are backing up only a file system that contains Oracle dump files. Oracle is dumping the database every day at 6 a.m., and before that, all previous dump files are deleted.
In my eyes, every day the files are new, and I can see that from the timestamp. The [dump files are 5TB total
The initial backup took 15 hours. The second backup took 3 minutes with 99% acceleration. I know that the files are almost the same as the previous ones, but I cannot understand how Accelerator knows that.
Info bpbkar (pid=27330030) accelerator sent 1024 bytes out of 5421600012288 bytes to server, optimization 100.0%
Does anyone can explain this behavior ?
PS: We are using media server deduplication. Client-side deduplication cannot be used because the deduplication ports are closed. We will open them later.
We are using a flex appliance with master, media, and worm storage roles. The Netbackup version is 10.1.1.
I agreee it is strange - I assume that the file dumped by Oracle each day (in question) all have the same size and file name - do you know if the contents would be similar?
Anyway if you want to determine the cause I would log a support case as the behaviour seems wrong. Otherwise, if the backup is just the Oracle dumps, modify the policy to remove the accelerator flag.