If you use a storage unit group (available for a few versions now) or
"any available," any available media server can backup any other media
server's client, or at least any clients that are configured that way.

 

Still don't have an answer to your other question. ;)

 

---

W. Curtis Preston

Author of O'Reilly's Backup & Recovery and Using SANs and NAS

VP Data Protection

GlassHouse Technologies

 

________________________________

From: Steven L. Sesar [mailto:ssesar at mitre.org] 
Sent: Monday, May 14, 2007 12:18 PM
To: Curtis Preston
Cc: Meidal, Knut; VERITAS-BU at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Newbie to Netbackup using VTL

 

Curtis Preston wrote: 

Steven L. Sesar said:
 
  

        The way that CommVault does it with Gridstor is that each media
server 
        shares an index cache (the equivalent of NBU's
catalog/databases) via 
        NFS or CIFS. I call it a "poor man's clustered filesystem". It
affords 
        one the luxury of pooling media servers, such that if one goes
down,
            

any 
  

        other can take over in it's place. Since the index cache is
shared, the
            

 
  

        job just picks up where it left off. It also allow one to load
balance 
        among media servers. 
            

 
NBU's index is already centralized at the master (and therefore shared
amongst media server), so media servers can take over for other media
servers any time.
  


Really? They will automatically failover/load balance? Something new in
6.x? How are the media servers logically grouped? Is this now a function
of STU groups? (pssst! I'm the guy who asked you the question at SNW
about email archiving's potential impact on de-duplication - still
haven't gotten a good answer on that one)




 
  

        The same goes for disk storage targets. If disk 
        storage unit "A" becomes unavailable for any reason, disk STU
"B" can
            

be 
  

        configured to take over in it's place. Massive job and component
            

resiliency!
 
This is where CommVault shines.  They can share a disk device on the SAN
where NBU can't (yet), and backups can span disk devices where NBU can't
(yet).  NBU 6.5 (due next month) is supposed to have both of these.
  






-- 
===================================
 
   Steven L. Sesar
   Lead Operating Systems Programmer/Analyst
   UNIX Application Services R101
   The MITRE Corporation
   202 Burlington Road - MS K101
   Bedford, MA 01730
   tel: (781) 271-7702
   fax: (781) 271-2600
   mobile: (617) 519-8933
   email: ssesar at mitre.org
 
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