Mailing List Archive

I migrated the majority of the data on our F740 to our F820
this past August. Total data was ~200GB, and a mixture of qtrees
and plain subdirs. I set up a private GigE connection between
the two, and used ndmpcopy across that. Total time to copy over
was just shy of 9 hours. The F740 was still serving data (read-only)
for that time (midnight-9am, so not a very high load).

In the tests I ran from our F810 to the F820 across private GigE
(both machines basically idle), the transfer was about 50% faster.

On Mon, Sep 30, 2002 at 08:26:32AM -0500, Geoff Hardin wrote:
> I am contemplating moving an entire filer from 18 GB drives (many,
> many problems) to 36 GB drives; the reasons are an entirely separate
> posting. My question is, what is the fastest, most reliable way to move
> the data?
> This past weekend, I moved about 100 GB in four different qtrees with
> ndmpcopy, and each qtree averaged about 40 hours to move (between 34 to
> 44 hours). I am looking at moving three times that amount of data on
> this other filer.
> I seem to recall using snapmirror or snaprestore when we migrated
> from an F630 to our F760C, but that was quite some time ago. I was
> wondering if anyone had stories, recommendations, pointers on what is
> the best method to transfer data.
>
> Thanks to all in advance!
>
> Geoff Hardin
> geoff.hardin@dalsemi.com
>
> Gun control is a steady hand!

--
Jeff Bryer bryer@sfu.ca
Systems Administrator (604) 291-4935
Academic Computing, Simon Fraser University

Geoff,

Easiest and fastest is to set up crossover cables
and use snapmirror. If you have multiple interfaces free
(a quad card maybe) interfaces can be trunked with vif;
with a single crossover line I saw a vol with 185 gig of
data mirrored in about 6 1/2 hours.

Syntax is dead easy, source -> destination; waldorf
is the source filer here.

netapp-demo> snapmirror initialize -S waldorf:domain2 netapp-demo:domain2
netapp-demo> rdfile /etc/snapmirror.allow
waldorf
netapp-demo>


--
Dave Toal
Unix Mostly
Thomson & Thomson
N. Quincy, MA




-----Original Message-----
From: Geoff Hardin
To: toasters
Sent: 9/30/02 9:26 AM
Subject: large data move

I am contemplating moving an entire filer from 18 GB drives (many,
many problems) to 36 GB drives; the reasons are an entirely separate
posting. My question is, what is the fastest, most reliable way to move
the data?
This past weekend, I moved about 100 GB in four different qtrees with
ndmpcopy, and each qtree averaged about 40 hours to move (between 34 to
44 hours). I am looking at moving three times that amount of data on
this other filer.
I seem to recall using snapmirror or snaprestore when we migrated
from an F630 to our F760C, but that was quite some time ago. I was
wondering if anyone had stories, recommendations, pointers on what is
the best method to transfer data.

Thanks to all in advance!

Geoff Hardin
geoff.hardin@dalsemi.com

Gun control is a steady hand!