Good day to you all,

 

Those of you who are thinking of using VTL's I would urge to re think
that technology. There are so many issues, the main being you are still
bound by SCSI rules. Another fact is that you need to delete tapes that
have been expired to claim back the "Disk" space. Have you heard of poor
media on VTL? Yes you get it and it is serious.

 

As far as backing up to VTL and then to tape, it is best to do an
in-line backup, where you backup to both VTL and real tape at the same
time.

 

NetBackup has released their Disk to Disk API to the public Domain and
we will soon be out of this interim phase of VTL's.

 

I am current investigating DataDomain which works extremely well with
NetBackup. I find the amount of space being saved is quite phenomenal.
The speed of backups is exceptional. There is also a wonderful
replication facility which guarantees your data to you off sire storage
in no time at all.

 

I have attached a PDF document for all y'all to look at, for more go to
http://www.datadomain.com/ where you will find more detail.

 

Good luck and may the force be with you :)

 

 

 

Kind Regards,

Clem Kruger

 

-----Original Message-----

From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Robin
Small

Sent: 12 May 2007 00:28 AM

To: VERITAS-BU at mailman.eng.auburn.edu

Subject: Re: [Veritas-bu] Newbie to Netbackup using VTL

 

Not sure if you've picked your VTL unit yet..

 

We're using the ADIC (now Quantum) Pathlight VX for our VTL. Mostly,
it's sharing out virtual LTO3s to our four NetWare cluster servers (with
some nifty linux master scripting to track the mounted volumes) and two
Oracle 9i RAC servers.

 

The Pathlight handles the virtual-to-physical connection automatically
and the barcodes are consistent between the virtual and physical, so I
can plug it into a physical autoloader and it'd be the same). 

 

We're not doing multiplexing on ours as it's primarily there to handle
data off of our SAN. I do have just a bunch of locally attached disk
(and a fc-attached jbod with linux software raid) set up as a dssu for
our slower 100meg lan-bound boxes.

 

I think the way you've described your clients-to-drives setup, I'd go
with fewer virtual drives unless you need all of these clients to act as
their own media server (and back themselves up), or if you *have to
have* them all writing at the same time.

 

-----Original Message-----
From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Robin
Small
Sent: 12 May 2007 00:28 AM
To: VERITAS-BU at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Newbie to Netbackup using VTL

 

Not sure if you've picked your VTL unit yet..

 

We're using the ADIC (now Quantum) Pathlight VX for our VTL. Mostly,
it's sharing out virtual LTO3s to our four NetWare cluster servers (with
some nifty linux master scripting to track the mounted volumes) and two
Oracle 9i RAC servers.

 

The Pathlight handles the virtual-to-physical connection automatically
and the barcodes are consistent between the virtual and physical, so I
can plug it into a physical autoloader and it'd be the same). 

 

We're not doing multiplexing on ours as it's primarily there to handle
data off of our SAN. I do have just a bunch of locally attached disk
(and a fc-attached jbod with linux software raid) set up as a dssu for
our slower 100meg lan-bound boxes.

 

I think the way you've described your clients-to-drives setup, I'd go
with fewer virtual drives unless you need all of these clients to act as
their own media server (and back themselves up), or if you *have to
have* them all writing at the same time.

 

-----Original Message-----

> 

> Hi everyone,

> 

> I'm new using VTL with netbackup.

> 

> I was hoping anyone here already implemented such a setup in their
current

> environment and hope share your general setup plan? I'm now planing
for

such

> a setup and only have experience using normal tape libraries.

> 

> I understand that VTL able to create multiple tape libraries and tape

drives.

> If i'm cloning data that already backup in VTL to the actual tape
library,

> what is the common practice? script? netbackup? 

> 

> Let's say if i have 100 clients and i do not use multiplexing and
instead

> creating 100 virtual tape drives, does it mean that i need 100 LTO3
tape

when

> i do cloning? Will the activity monitor display backup failure from
VTL to

> the normal tape library?

> 

> Any help is much appreciated. Thank you in advance

 

 

 

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