Mailing List Archive

If the development data is on a separate volume from the production data you
can do a volcopy which works quite well. There is an option to turn up the
throttle of the volcopy to 10 (max) on source filer. The destination volume
must be offline when the data is being copied and it will write over
anything on the destination volume.

If the dev and prod data is on the same volume, I've always used tar and
directed the output to a nfs mounted filesystem from another filer.

Marilyn
Next Level Communications

-----Original Message-----
From: Geoff Hardin [mailto:geoff.hardin@dalsemi.com]
Sent: Wednesday, July 24, 2002 7:35 AM
To: toasters
Subject: moving files between filers


What is the preferred method of moving directories between filers?

I was wondering what method the toaster community in general
preferred. In the past I have used tar from my UNIX admin host, rsync,
dump/restore, ndmpcopy, and cp. I have about given up on ndmpcopy
because even across GbE, I see better thruput using tar or
dump/restore. A couple of the admins I've spoken to swear by rsync, but
I have only used it sparingly.

I have a clustered pair of F760s, one filer for a production database
and the second for a development database. Originally, both the
production and development work was on the first filer, but space for
production work began to run low. We are now moving development data
off the production filer onto the development filer and we want to
minimize the impact to the production filer while moving the data in a
timely manner to the development system. The filers are on the same
backup GbE LAN, so the network connection between the two is stable and
fast.

Any thoughts, opinions, or war stories greatly appreciated.

Geoff Hardin
geoff.hardin@dalsemi.com
Difficulty is the excuse history never accepts.

volcopy does work well, the destination volume blocks are copied identically to the source volume. One benefit of using ndmpcopy is that the data is written contiguously which will eliminate any fragmentation.

Mike

-----Original Message-----
From: Caven, Marilyn [mailto:mcaven@nlc.com]
Sent: Wednesday, July 24, 2002 8:20 AM
To: 'Geoff Hardin'; toasters
Subject: RE: moving files between filers


If the development data is on a separate volume from the production data you
can do a volcopy which works quite well. There is an option to turn up the
throttle of the volcopy to 10 (max) on source filer. The destination volume
must be offline when the data is being copied and it will write over
anything on the destination volume.

If the dev and prod data is on the same volume, I've always used tar and
directed the output to a nfs mounted filesystem from another filer.

Marilyn
Next Level Communications

-----Original Message-----
From: Geoff Hardin [mailto:geoff.hardin@dalsemi.com]
Sent: Wednesday, July 24, 2002 7:35 AM
To: toasters
Subject: moving files between filers


What is the preferred method of moving directories between filers?

I was wondering what method the toaster community in general
preferred. In the past I have used tar from my UNIX admin host, rsync,
dump/restore, ndmpcopy, and cp. I have about given up on ndmpcopy
because even across GbE, I see better thruput using tar or
dump/restore. A couple of the admins I've spoken to swear by rsync, but
I have only used it sparingly.

I have a clustered pair of F760s, one filer for a production database
and the second for a development database. Originally, both the
production and development work was on the first filer, but space for
production work began to run low. We are now moving development data
off the production filer onto the development filer and we want to
minimize the impact to the production filer while moving the data in a
timely manner to the development system. The filers are on the same
backup GbE LAN, so the network connection between the two is stable and
fast.

Any thoughts, opinions, or war stories greatly appreciated.

Geoff Hardin
geoff.hardin@dalsemi.com
Difficulty is the excuse history never accepts.

On Wed, Jul 24, 2002 at 08:19:40AM -0700, Caven, Marilyn wrote:
> If the development data is on a separate volume from the production data you
> can do a volcopy which works quite well. There is an option to turn up the
> throttle of the volcopy to 10 (max) on source filer. The destination volume
> must be offline when the data is being copied and it will write over
> anything on the destination volume.
>
> If the dev and prod data is on the same volume, I've always used tar and
> directed the output to a nfs mounted filesystem from another filer.

If, like in my situation, you need to constantly move data between 2
production filers over GB pipe, ndmpcopy is a clear winner speed-wise.

Igor

For more information on how to go about doing it using ndmp see:
http://now.netapp.com/Knowledgebase/solutionarea.asp?id=ntapcs2471

Paul Chan
NOW KB team

-----Original Message-----
From: Igor Schein [mailto:igor@txc.com]
Sent: Wednesday, July 24, 2002 9:56 AM
To: Caven, Marilyn
Cc: 'Geoff Hardin'; toasters
Subject: Re: moving files between filers


On Wed, Jul 24, 2002 at 08:19:40AM -0700, Caven, Marilyn wrote:
> If the development data is on a separate volume from the production data you
> can do a volcopy which works quite well. There is an option to turn up the
> throttle of the volcopy to 10 (max) on source filer. The destination volume
> must be offline when the data is being copied and it will write over
> anything on the destination volume.
>
> If the dev and prod data is on the same volume, I've always used tar and
> directed the output to a nfs mounted filesystem from another filer.

If, like in my situation, you need to constantly move data between 2
production filers over GB pipe, ndmpcopy is a clear winner speed-wise.

Igor