DAR is available in 7.2.1 since I am using it on that release. From what I
understand from support, it is just not well documented. I believe it was in
one of the release notes.
On Tuesday 01 August 2006 08:39, Krishnan, Ramamurthy wrote:
> BTW, it looks like the DAR support for DSA based backups is available
> only from NetWorker 7.3 on. We found our restores going dead slow (not
> using DAR) when we tested this option on NetWorker 7.2.2.
>
> Rgds, Ram.
>
> -----Original Message-----
> From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT
> EDU]
> On Behalf Of Matthew Huff
> Sent: 01 August 2006 14:32
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: [Networker] Index File Size?
>
> DSA is short for "Data Server Agent". Look in Chapter 12 of the
> Unix/Linux Admin guide for 7.2. It has nice diagrams of the
> configuration. Basically, it packages the NDMP datastream (in NetApp's
> case, the NetApp modified ufsdump) into a legato stream and sends it
> across the network to the Legato server. Local drives are no longer
> required
>
> Pro's for DSA
> --------------
> Support for any Networker device.
> No need for DDS (drives are attached to server/storage node)
> Multiplexing is supported Backup to Disk is supported Variable block
> size (much faster tape performance) No separate storage pool required
> (can be multiplexed with other
> backups)
> Using backups with qtrees, much higher parrallelization can be achieved
>
> Con's for DSA
> --------------
> Can be a load on the network/nics
> Requires custom configuration including tuning
>
>
> I've got all the Solaris tuning if anyone needs. We use a separate VLAN
> with jumbo frames over gigabit ethernet. We tweaked the TCP/IP settings
> on the Sun Server (Sun V490 running Solaris 9), and are getting good
> performance. The client config in Network Admin is kinda tricky (you
> have to use parameters to tell Legato to use a separate NIC for
> example). But once it's setup, it is pretty hands-off.
>
>
> --
> Matthew Huff | One Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA LLC | Phone: 914-460-4039
> mailto:mhuff AT ox DOT com | Fax: 914-460-4139
> -----Original Message-----
> From: John Stoffel [mailto:john.stoffel AT taec.toshiba DOT com]
> Sent: Monday, July 31, 2006 1:12 PM
> To: Legato NetWorker discussion; Matthew Huff
> Subject: Re: Index File Size?
>
>
> Matthew> With Networker 7.1 you should be looking at DSA backups for the
>
> Matthew> NetApps rather than NFS. With DSA, you can keep the drives
> Matthew> attached to your Networker Server and/or Storage Node. The
> Matthew> streams are parallel and are treated like any other NetApp
> Matthew> backup. I would recommend a seperate VLAN and separate
> Matthew> interfaces for the backups including tweaking the backup
> Matthew> servers TCP/IP settings and running Jumbo frames, but even if
> Matthew> you don't, it should be better than NFS backups.
>
> Interesting. Poking around the http://software.emc.com/... stuff, I
> don't see anything explicitly talking about this. I assume this is NDMP
> by another name?
>
> The problem I've seen with NDMP is that it barfs with restores of over a
> million files, and I have users who have directories/qtrees which exceed
> this level. Annoying, yes, but not something I can do anything about.
>
> Matthew> DSA is built-in to Networker (although you have to have NDMP
> Matthew> client licenses).
>
> Interesting. Can you give us more details, such as what DSA really
> stands for? And how you're using it, if you are using it? I'm always
> looking for a better way to backup my NetApps.
>
> Thanks,
> John
> John Stoffel - Senior Staff Systems Administrator - System LSI Group
> Toshiba America Electronic Components, Inc. -
> http://www.toshiba.com/taec
> john.stoffel AT taec.toshiba DOT com - 508-486-1087
>
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