As mentioned in some other replies there are options for doing this.

1) NFS backup           (blows chunks)
2) CIFS backups         (blows chunks)
3) direct NDMP
4) san NDMP
5) remote NDMP          (either to another netapp or a media server)

I'm sure you can tell that I am not a proponent of options 1 and 2.  And
they aren't even options if you do multi-protocol access.  So just
forget those unless you're really into pain.

The rest are all very similar, use NDMP to handle the command data and
have the backup stream(s) go through scsi, fiber, or ethernet.  It seems
that remote NDMP is faster because filers are optimized for Ethernet
traffic, not FC or scsi.  In fact, those 2 protocols actually act as
interrupts to Ethernet and can cause a lot of context switching.  But
any of them work.

San NDMP has the benefit of not requiring a reboot every time something
chodes on the tape drive.  With direct attached drives (scsi) you cannot
re-probe the bus if a drive is replaced.  Basically anything that causes
a drive to fall off the bus even for a few seconds will require a reboot
of the filer to see it again.  Very inconvenient.  Fiber attached drives
do not have that problem since you can re-probe a fiber bus online.

I have heard that remote NDMP to a NBU NDMP media server takes a
performance hit (75% of normal) but I have no empirical evidence of
this.  I hear with products like DynaStor the performance increases
noticeably over FC/scsi attached.  Again, only hearsay.

~JK

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Jennifer
Hooper
Sent: Thursday, December 09, 2004 9:00 AM
To: 'Dan Logcher'; 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: RE: [Veritas-bu] Backing up Netapss

You need to use either straight NDMP or Remote NDMP.  We use Remote NDMP
here, but I have no idea how that works or is configured yet, because
the
previous admins saw fit not to clue me in.  (anyone want to help???)

Thanks!

Jen  

-----Original Message-----
From: Dan Logcher [mailto:dlogcher AT MIT DOT EDU] 
Sent: Thursday, December 09, 2004 8:15 AM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] Backing up Netapss

Does anyone have any experience doing this?

We have a user that wants to start backing up this mess, and it's been
years
since I've even touched a Netapp.

--
Dan

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