03-22-2016 10:23 PM
Hi
I wonder if there is fine tuning option to accalarate export to tape. windows file server with over a milion small files,it is 8 TB size by now, and tape is LTO6
it is taking around 4-5 days to finish export
I have read a little about buffer options etc but too afraid to create new problem after changing default settings
Happy to know about best parctice about it
Media server redhat 7
master server win 2008r2
Regards
Itai
03-22-2016 11:44 PM
03-23-2016 01:13 AM
See my blog on tuning Netbackup tape buffer size:
http://www.mass.dk/netbackup-guides/netbackup-buffer-tuning-2/
It is just two files to edit - the blog tell how to do it.
03-23-2016 03:17 AM
The probalem could be it is over a million small files - each file has to be accessed, opened, closed ...
If you backup a bigger file to the same drive, is this quite fast (a file that is say a few hundred MB)
If I am correct, no amount of tuning will fix ythis, it is a limitation of the operating system, not the backup software - all backup softweare has this problem.
Flashbackup might be better
03-23-2016 03:41 AM
I think I misinterpreted 'export to tape' as 'duplication to tape'.
Are you doing backup straight to tape?
There is very little that can be done to speed up the backup of millions of small files to tape.
The only real solution (without dedupe disk, client side dedupe and Accellerator) is to use FlashBackup option.
You need NetBackup Enterprise Client license for this and sufficient space on the File server for VSS snapshot.
FlashBackup backs up the entire raw partition but allows file-level restore.
03-23-2016 07:39 AM
Windows DFSR? Best bet would be to make that fileserver a NetBackup Media Server (presuming it has an HBA).
03-28-2016 07:32 AM
Martin - I understand what you are saying. But I too many times seen customers complaining over bad backup speed, just because the basic buffer tuning wasn't carried out.
Once tape buffer was tuned backup speed actual rose to a acceptable level.
03-28-2016 11:03 AM