Veritas-bu

[Veritas-bu] Newbie to Netbackup using VTL

2007-05-14 14:52:40
Subject: [Veritas-bu] Newbie to Netbackup using VTL
From: cpreston at glasshouse.com (Curtis Preston)
Date: Mon, 14 May 2007 14:52:40 -0400
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.

>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.