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Two master, two VTL, one physical library

Created: 28 Feb 2013 | 7 comments

Hey all,

I am facing an interesting situation brought about to me.  Currently we are getting ready to standup a new VTL which will provide much needed storage allocation, deduplication, and OST protocol privelages.  However, for at least a time, we want to have both VTL's stood up in order to accomodate backup needs while our transition period persists and testing can be conducted.  The issue I am percieving is the fact that both VTL's will be connected to one physical tape library.  My fears are that SCSI operations from multiple devices may cause situational problems. 

Just curious if anyone has had any experience in this type of scenario?  Budget limitations of course prevent the purchase of a new physical library so that solution is out the door.  I believe there may be potential if the physical library can be partitioned in a sense to allow for two devices to utilize its features but wanted to at least drop this on the table and get some ideas from other backup admins. 

Operating Systems:

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Nagalla's picture

why would need to connect VTLs to physical library?

you need to connect VTL and Physical libray to media server.. that is more then enough.,  and netbackup does not know if its physical or VLT, so its does not make any issues...

if you are connecting both each VTL to different master server and and trying to share the phycial library for both master server.then check your Physical libary have ability to make logical partitions.

what is your Library hardware info

 

Marianne's picture

We need ALL relevant info.

You mention VTL as well as OST. Which one? OST or VTL?

What is your Appliance make/model? 
You would normally config appliances as either VTL or OST, not both. 

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

epsilon22222's picture

Ah yes, good point, I am still in the habit of calling it a VTL as that was its original intended purpose.  We are going to be standing up a Quantum Dxi 8500 along side a NetApp VTL 700(currently used), and connect it up to a Quantum iScalar 2000 physical tape library.  Our current environment of course, entails the 700 being connected to the iScalar2000 for physical tape writing.  With OST, we hope to enforce the same procedure by utilizing built in SLP's within the Quantum or Netbackup's depending on testing results.

We are simply trying to test the new 8500's features before completely eliminating our old 700 from the environment.  Unforunately, we do not have a test environment to conduct this type of experimentation otherwise.

Marianne's picture

Apologies - missed your reply in Feb.

You can partition the i2000 and assign each partition to each of the masters.

OST works great with Dxi 8500.

Let us know how this is working for you!

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

epsilon22222's picture

Not a problem Marianne, looks like I missed your response in March.  :)

We are still preparing this and I am conflicted with NDMP setup.

Do you or anyone else have any experience with NDMP OST backups? I understand that it will more than likely be a three-way NDMP backup which in my opinion doesn't seem ideal...

Marianne's picture

More like a normal client backup where NDMP is backed up over the network to Media server with OST plugin.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

epsilon22222's picture

That would be called "Remote NDMP", correct? Sorry for the incorrect terminology.  The 3 step process still occurs though as the media server serves as the middleman in this instance?