In cDOT I would recommend against qtrees unless absolutely needed. As for needed, things like hitting volume limits come to mind.

Why?

Because you can’t leverage cool features like volume move effectively. If you have 800 qtrees in a volume and one of those qtrees is causing node-wide perf issues, you can’t move it to another node. You can only move the volume, and thus, you are simply moving the problem.

From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Payne, Richard
Sent: Thursday, January 22, 2015 1:30 PM
To: tmac; Rhodes, Richard L.
Cc: toasters@teaparty.net
Subject: RE: Everything in a qtree?

I’d second that…and obviously if you want any sort of user level quotas, or want to be able to mirror/move the data in the qtree.

--rdp

From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of tmac
Sent: Thursday, January 22, 2015 1:25 PM
To: Rhodes, Richard L.
Cc: toasters@teaparty.net
Subject: Re: Everything in a qtree?

For my customers....I called that: TMAC's rule #1 ;)

Always use qtrees. Always.

In 7-mode, it really did not hurt and when migrations came up, it was trivial to move the qtree piece,

In the first versions of cDOT though, qtrees were really not used.

Migrating was done (via the netapp tools) at the volume level (since cDOT had no use for qtrees)

Personally, I would stick with the qtrees if you plan on sticking with 7-mode.

Snapmirror/vault can be done at a volume, qtree or "all top directories but qtrees" layer.

--tmac

Tim McCarthy

Principal Consultant

On Thu, Jan 22, 2015 at 1:16 PM, Rhodes, Richard L. <rrhodes@firstenergycorp.com> wrote:

Hi,

Back about 7 years ago when we purchased our first NetApp systems we hired a NetApp consultant to help us set them up.  One of the things he told me was to always put everything in a qtree.  Whether it’s a cifs shares, nfs export, or luns . . . put them in a qtree.  I have followed that practice.  I think part of this was that our NetApp systems are for a particular application and we use snapvault for some of the backups (luns and cifs shares).  This is all on OnTap v8 in 7-mode. 

As I’m about to create some CIFS shares for other uses, I’m wondering if this is a good practice.  The new shares would be volume snapmirror’ed to a DR site, but no snapvault. 

Any opinions are appreciated.

Thanks

Rick 

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