Windows is a piece of cake.
Install the client.
Select Policy Type: Flashbackup-Windows
Setup Selection List: \\.\R: (change
drive letter as required)
Run Policy
Enjoy monumentally faster backups (on compressed volumes)
You cannot backup the system drive (C:) or System State with
Flashbackup. I normally run these in a 2nd “OS” policy.
Be sure to test a restore. You can do “entire volume” restores,
which are just as fast as backups. Or, you can restore individual files.
-Jonathan
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of WEAVER,
Simon (external)
Sent: Thursday, September 16, 2010 9:08 AM
To: William Brown; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Real World NBU Buffer settings Win2k3
Hi William
Well it wont accept the settings, so I am going to look at:
1) Flash Backups
2) Try backup to disk
3) Use NTBackup
have a comparison to work with. I also have an Eval License of all
features! Hooray!
Quesiton: Can anyone confirm the best way to setup Flash Backups.
Running through the Beginners Guide now (Quick Start Guide), but need to know
of any "gotchas"! - Just learned it cannot do system volumes.
S.
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of William
Brown
Sent: Thursday, September 16, 2010 11:33 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Real World NBU Buffer settings Win2k3
We use 262144 buffer size everywhere for both NET_BUFFER_SZ and
tape SIZE_DATA_BUFFERS (or Windows equivalent). What I did find made a
very large difference when I was benchmarking an LTO4 drive (which has a 4Gb FC
interface) was switching between a 2Gb HBA and a 4Gb HBA – the throughput
nearly doubled. That was testing with ‘dd’ not NetBackup, but was going
through the (Solaris) OS. So I would see if there is any way that you can
up the speed, even if you go point-to-point and not via a SAN switch to avoid
having to upgrade your fabric [no use if you share the drives with SSO!]
For Windows on FC you should find any modern FC driver will use
the tape buffer size that you set. 64k was with the Windows scsi driver,
and for some SCSI cards you might have to adjust the MaximumSGList in the
registry – (http://mailman.eng.auburn.edu/pipermail/veritas-bu/2006-February/083653.html)
and (http://h20195.www2.hp.com/v2/GetPDF.aspx/5982-9971EN.pdf). More
recent Adaptec driver install kits I have noticed do this for you. You
should be able to see in the bptm log what size is being used. The fact
you say the tape would not mount if you change settings *is*
suspicious. Make sure you have the latest drive/robot settings files so
your drives are properly set to variable block size. Again bptm log
should help.
If the data is compressed on disk then I assume the Windows OS
is having to decompress on the fly as it reads the disk which is going to hit
the client quite hard on the CPU. Not much you can do about that, but
FlashBackup would not have to do that so I’d say was worth trying. Bear
in mind it will back up the entire volume, so you don’t want to be backing up a
lot of empty space (though paradoxically that empty space would compress nicely
when it hits the LTO drive’s h/w compression, provided Windows is zeroing the
blocks on file deletion…not sure if it does this or even can be made
to…otherwise you have a great disk scavenger ;-) ).
William
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of WEAVER,
Simon (external)
Sent: 15 September 2010 19:00
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Real World NBU Buffer settings Win2k3
Hi All
Anyone got any real world experience on buffer settings:
scenarion:
Win2k3 San Media, connected to 2GB Fabric attached 8 LTO4 Drives.
Due to drive availability, Multiplexing onto one drive.
Main problem: One volume (1,7tb in size) takes over 4 days to fully
complete.
Got the Tuning Guide and Technote 244602, but I tried some settings,
only to find the backup would not even mount tape correctly.
So back to "no" settings at the mo.
Volume are generic files/folders, mixture of large and small sizes.
But 1.7TB's in my view should be done quicker. Also Data is compressed.
Regards
Simon
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