Using a 'basic disk' on a dedupe appliance would be fairly simple and limit the
licences required. However check the small print, NetBackup used to require a
higher type of licence to store data on a deduplicating appliance, even if you
were not using AdvancedDisk or other fancy functionality.
The problem if you use any solution that has a 'Storage Server' (e.g.
AdvancedDisk or OST) is that the locations are in the form @aaargh and these
cannot be made to be the same on different master servers, even if they
actually point to the same storage, or a replica. As you note it is now not
easy to go into the image database and edit these settings. Not totally sure
of that as it was a problem Symantec were well aware of ~5 years ago, there
might be tools now.
With a CIFS Basic Disk as you show, the only issue that I have heard of is if
the local and remote appliances are not part of the same AD forest. As I
understand it the replicated files' ACLs have numeric SIDs attached, and if you
go outside the forest, those SIDs either cannot be resolved or resolve to
unintended ACEs. For example Data Domain used to tell you to run the replica
in Workgroup mode. However where they are all in the same AD domain (or at
least forest I think) then the ACLs are fine in the replica.
I'd concur with the comment about compatibility matrices being a minefield as
you get more vendors involved. However the NetBackup appliances cannot also
function as 'ordinary' deduplicating NAS which can have some nice uses.
William Brown
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of
Bahnmiller, Bryan E.
Sent: 16 October 2014 15:06
To: 'Lightner, Jeff'; VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU; 'Martin,
Jonathan'
Subject: Re: [Veritas-bu] Deduplication with OST
We are currently running 10 GbE from our Linux backup servers to the dedupe
appliances. The dedupe appliance vendor does charge a significant price for
their OST compatible license/plugin. It is a one-time license that can be used
with multiple media servers or even multiple NetBackup domains. But also note,
the vendor plugin also offloads most of the dedupe process to the media server
based on the plugin. This significantly reduces the amount of traffic between
the media servers and the dedupe appliance. But if your media server is low on
memory or CPU, the plugin could drive you over the top.
The other nice thing with replication to remote sites is easy, and uses very
little bandwidth. Essentially NetBackup controls the replication but the dedupe
appliance is actually moving the data - in deduplicated form. This can be done
using a remote media server to your local NetBackup domain, or it can be done
with AIR. We do both methods, for various reasons. If you go with AIR and a
dedupe vendor, you may need to go to NBU 7.6.x. AIR with other vendor's dedupe
has some limitations based on NBU version.
I think the NBU appliance solution is also very competitive. All forms of
replication are intrinsically supported. No need to consult the vendor support
matrix every time you upgrade, or to see if new features are supported. The
Deduplication is built in, replication via AIR and/or SLP's is supported. The
appliances have built-in 10 GbE.
Jonathan, as far as your DR solution goes, it should work, other than in your
DR scenario your appliance is going to contain "copy 2" of the backup. And that
is dependent on the name of the remote appliance/path is identical to the name
in your current production setup. If the name has to change in any fashion, you
might actually have to import all the disk images. I would test the DR
configuration to be sure.
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of
Lightner, Jeff
Sent: Thursday, October 16, 2014 8:29 AM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: Re: [Veritas-bu] Deduplication with OST
We never got OST license here but use Deduplication. We do it using 10 GB
Ethernet NFS mounts from the Dedupe appliances on each of our master and media
servers. It may not be cheaper in the long run to buy a 10 GB switch and 10
GB HBAs for every server (although some now come with embedded) than using OST
(especially if you already have a fibre san). Here our solution evolved from
1 GB NFS to the 10 GB with switch so has been done over time. Both the Data
Domain and the Quantum DXi dedupe appliances allow for the 10 GB (which runs at
fibre speeds but does Ethernet instead of SCSi).
My understanding is that most of the Dedupe appliance makers allow you to do a
setup to wherein you have one (or more) unit(s) on site and similar offsite and
do background synchronization from the onsite to offsite to avoid having to
send tapes. Here we are still doing Dedupe onsite but duplicating to tapes to
be sent offsite (again because of evolution - we used to backup directly to
tape).
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Martin,
Jonathan
Sent: Wednesday, October 15, 2014 8:25 PM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] Deduplication with OST
All,
We are currently running 7.5 on Windows and looking to add deduplication
appliances as a backup target. Ideally, we would purchase the DPOO (OST/AIR)
license to keep track of the images as they write locally and then replicate to
DR, but that may not be a possibility based on budgetary concerns. Without
getting into the specifics of which deduplication appliances we are looking at,
I can safely assume that we can use a DSU or DSSU to write to a local CIFS
target (e.g. \\Prod-Appliance\Backup1 replicated behind the scenes to
\\DR-Appliance\Backup1). I am looking at a scenario where we use VM replication
to replicate the master/media servers from Prod to DR. When I bring up this
master/media in DR, could I use a hostname/DNS alias to make \\Prod-Appliance
redirect to \\DR-Appliance?
I realize that this is essentially a "poor man's OST/AIR", but this may be the
path I have to go down due to budgetary constraints. Is anyone doing anything
similar to this? In previous versions of Netbackup I could crack open the
catalog files to modify the fragment locations (e.g. E:\Backup --> F:\Backup)
but it looks like those pointers have all been moved (into the DB?)
Your ideas are appreciated,
-Jonathan
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