Sorry for the late jump in, just catching up on email.
We use Quantum/ATL P7000 GigE network attached tape libraries
to backup our NAS filers. In this configuration, I basically
have all my tape drives shared among all my filers. IE: None
of my drives are dedicated to any filer. We use level 9
for file history and we can recover files or directories
without having to restore a huge volume to a spare device.
Today, I restored 4 single files for a user that was buried
6 levels down. Took about 1 hour though, but that will soon
change with the release of DAR (Direct Access Restore), which
is due soon.
We only have about 95TB here, but NDMP has been used reliably
at this site for over 3 years. But I agree with the way NDMP
works, it either does or it doesn't. There is no middle.
If you don't have an ATL GigE library, you can direct attach
a tape drive/s to the filer, then using 3-way NDMP you can
backup other filers over the network using that filer's STU.
This is how I use NDMP in our remote sites with only 2 or 3
filers and a single drive robot.
I'll be glad to help you if you have any NDMP questions.
thanks.
john
Jeff Kennedy wrote:
>
> I concur with everything except the last statement regarding DDS for
> NDMP. NDMP as a protocol supports it as do several vendors. Of the
> major NDMP backup software vendors only Veritas does not support DDS.
>
> ~JK
>
> Steve Curry wrote:
> >
> > Yucel,
> >
> > We backup close to 350TB a week over NDMP. The thing is that it either
> > works or does not, there is no middle ground. It seems to be the most
> > efficient way for us to get the data off our NetApp filers. It puts
> > about a 15% hit cpu wise on our filer and seems to climb about 5% for
> > each additional stream (although I wouldn't recommend more than 2
> > streams on a busy box). The things that I don't like about NDMP include
> > the fact that file history is very difficult to capture and therefore on
> > most of our boxes, we do not capture that data. This means if someone
> > needs to restore a file or directory, I have to restore the whole volume
> > to our spare filer and pull that data off. Filers are very reliable
> > though and because of snapshots that is a rare case. I also wish that
> > you could do dynamic drive sharing with NDMP host, but you can't for
> > now. Veritas does however promise that feature sometime next year I
> > think. We'll see... ;)
> >
> > If there is anything else you want to ask me, please feel free.
> >
> > Steve Curry
> > Guardian of Y! Production Data
> > Yahoo! Inc.
> >
> > (e) scurry AT yahoo-inc DOT com
> >
> >
> > #-----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 erbilgic.ym AT pg DOT
> > com
> > #Sent: Thursday, September 26, 2002 7:43 AM
> > #To: veritas-bu AT mailman.eng.auburn DOT edu
> > #Subject: [Veritas-bu] NDMP expectations
> > #
> > #Hi All,
> > #
> > #I remember reading a lot about NDMP and issues using it. Does anyone
> > have
> > #good/bad experiences using NDMP to backup Solara (EMC) or any other
> > NAS
> > #box?
> > #Especially at a 2+ Terabytes range?
> > #
> > #I would very much be interested in your feedback.
> > #
> > #Have a great day.
> > #
> > #Regards,
> > #
> > #Yucel
> > #
> > #---------------------------------------------------------
> > #Yucel M. Erbilgic
> > #erbilgic.ym AT pg DOT com
> > #(513) 945-1859
> > #
> > #
> > #
> > #
> > #_______________________________________________
> > #Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> > #http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> >
> > _______________________________________________
> > Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
> --
> =====================
> Jeff Kennedy
> Unix Administrator
> AMCC
> jlkennedy AT amcc DOT com
> _______________________________________________
> Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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+ John D Stephens ITS Design Systems +
+ Texas Instruments 12500 TI BLVD, Dallas +
+ jstephens AT ti DOT com 214-480-6229 +
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