Hello

With classic or 7G Data ONTAP, all of the administration is stored in flat files on each storage system.

Using Clustered Data ONTAP, all of the administrative information is stored in relational databases that are shared by all systems in the cluster.

This feels more elegant to me because it means that if I want to create a user to perform a function such as backup operator, in 7G, I had to do so on every storage system, in cDOT, I create the user once for all the systems.

The same holds true for what we used to call exports and now call export policies. You create them once per cluster even if you have 20 storage systems in a cluster.

And what is really handy and nice is the tab for completion. Once you get used to tabbing through a command line, you want to use that on your 7-Mode systems.

But you might feel like it is necessary when simple command like:

ping nodename

becomes

network ping -node local -destination node name

Ramp up takes some time.

In my opinion, Clustered Data ONTAP is a paradigm shift. You can simple map the commands one to one between 7G and cDOT because the implications are different but once you get used to it, it is very hard to go back. You feel like you are traveling back to the early 90s when you use the 7G systems.

That is my take on it.

--April

On Wednesday, November 6, 2013 1:15 PM, tmac <tmacmd@gmail.com> wrote:

The tool appears to be directed to small installations.

If you have large/complex systems, it would be best to enlist the NetApp PS crew.

I used the the tool that preceeded the 7MTT...the Volume Transition Wizard...which by

the way may panic a destination running 8.2...found out the hard way! The VTW worked

OK prior to 8.2.

It was easy to setup per volume. I have not played much at all with the new tool as now that

I am migrated, I really have no use for it ;)

--tmac

Tim McCarthy

Principal Consultant

Clustered ONTAP Clustered ONTAP

NCDA ID: XK7R3GEKC1QQ2LVD RHCE6 110-107-141 NCSIE ID: C14QPHE21FR4YWD4

Expires: 08 November 2014 Current until Aug 02, 2016 Expires: 08 November 2014

On Wed, Nov 6, 2013 at 4:02 PM, Koji Kabuto <kabutovr6@yahoo.com> wrote:

That must have been a while ago since SAN has been supported in cDOT starting with 8.1.

Regarding migration from 7-mode to cDOT, NetApp has a tool named 7MTT that leverages SnapMirror to migrate data from 7-mode to cDOT filers.

-k

> On Nov 6, 2013, at 12:50 PM, "John Stoffel" <john@stoffel.org> wrote:
>
>
> tmac> It may be a tiny bit more complicated, however, after you
> tmac> administer it for a short while you will find it is very close
> tmac> to 7-mode.
>
> tmac> I now prefer it to 7-mode due to many enhancements (too many to
> tmac> list mind you).
>
> But what about the limitations? We looked at it when we moved up to
> 3220s and 3250 pairs, but in particular the vFilers not being able to
> do SAN FC LUNs was a big turn off for us. I wanted to setup a certain
> group in a vFiler, but since they are FC only mostly, it was a no-go.
>
> We're currently running 8.1.2 in 7-mode and fairly happy. Thinking up
> upgrades, but if it ain't seriously broke, why bother?
>
> Also, how would we migrate from 7-mode to cluster mode with a minimum
> of hassle?

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