If you are using NTFS then you size must be less than about 50GB.  NTFS
files larger than that would error in Netbackup on my original testing.
I'm currently using 10GB for my fragment sizes but I haven't done any
performance testing related to other fragment sizes.

-Jonathan

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Justin
Piszcz
Sent: Monday, March 03, 2008 4:25 PM
To: Mohre, Oliver
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Fragment Size



On Mon, 3 Mar 2008, Mohre, Oliver wrote:

> Dear NetBackup community,
>
>
>
> i have a question about the "Fragment Size" option in NetBackup 6.5 
> Windows Server 2003 environment.
>
> Are there any good known values for? Actually I set for all storage 
> units (diskstaging and mediamanagers) a value of 2048 MB - is this a 
> good option or is this fragment size to small?
It depends on your dataset, I use 32 GiB personally, back in the day I
used to use 2048 MiB but with drive backup speeds > 100 MiB/s the drive
barely spins up for a few seconds before it has to take a moment and
write a marker every
2 gigabytes, I recommend a higher value.

Obviously the higher the value means the longer it will take to seek for
an individual file so its up to you to pick a good value.

>
>
>
> I would be pleased about some experienced data from same environments 
> (Windows NTFS Filesystem).
>
>
>
> thanks in advance and greetings,
>
> Oliver Mohre
>
>
>
>
>
>
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