Wilkinson, Alex wrote:
> 
> What is an "OST interface" ?
> 


The OpenSTorage interface, a new way to use your Data Domain boxes (and other 
boxes that support it) with NetBackup.  It's not NFS or CIFS, it is its own 
transport.  It is also not VTL.  Think of it as a more intelligent DSU. 

In the case of DD & Quantum, the data is sent over IP.  With Falconstor, the 
data is sent over Fibre Channel.

With DD boxes (which is what started this conversation), the first improvement 
you'll get simply by switching from NFS/CIFS to OST is a significant increase 
in performance.   With all systems that support OST, you also get what NBU 
calls "optimized deduplication," where NBU tells one OST device to copy a given 
backup to another OST device.  The OST device (in this case, the DD box) will 
use dedupe and replication to get the data there.  Once there, it informs NBU.  
Now NBU knows about both copies, just as if it had duplicated it via 
bpduplicate.  Nice, huh?

The nice thing that OST is supposed to support is tape-out functionality, where 
an OST device can copy it's backup to tapes and tell NBU which tapes got which 
backups.  Again, just as if it NBU did the copy.

Here's my blog post about OST:
http://www.backupcentral.com/content/view/198/47/

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