[Veritas-bu] Newbie to Netbackup using VTL
2007-05-14 15:17:49
Subject: |
[Veritas-bu] Newbie to Netbackup using VTL |
From: |
ssesar at mitre.org (Steven L. Sesar) |
Date: |
Mon, 14 May 2007 15:17:49 -0400 |
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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