Why does system manager 2.0r1 set no_i2p on by default?

dejanliuit · ‎2012-01-19

Is there any particular reason why newly created volumes on a Ontap 8.0.1 gets no_i2p set to on by default?

Supposedly i2p helps optimize some operations so I see no reason to disable it.

karthikv · ‎2012-01-19

System Manager does not set or change any Volume options when it is created from the interface. It is just a GUI over ONTAP.

You might want to post your question in the ONTAP community discussion forum to know the behavior in ONTAP

-Karthik

dejanliuit · ‎2012-01-20

Well, neither "vol create" nor Filerview creates volumes with no_i2p on by default.

That is why I assumed there is something with System Manager 2.0 default options.

But I can move the discussion if you still think it has to do with some Ontap defaults.

karthikv · ‎2012-01-20

Just got an update from SM Engineering team.

If the Volume type is selected as NAS in System Manager, the no_i2p option is not set. ONTAP defaults are used.

If the Volume type is selected as SAN, no_i2p option is set by SM. This is keep feature parity with System Manager 1.0 and System Manager 1.1.

We are currently evaluating the implication of not setting no_i2p Volume option from System Manager.

Are you creating a NAS or SAN Volume? If it is a NAS Volume then the option should not be set and it might be a bug and we need to look into it.

Thanks,

Karthik

dejanliuit · ‎2012-01-20

Yes, I was creating a ”SAN” Volume and got the no_i2p option set.

I tested with “NAS” volume and then no_i2p is not set, as you developers told you.

I would argue that I don’t care how System Manager 1.0/1.1 behaved.

Did 1.0/1.1 do the right thing would be the question?

I’m only interested in the current software setting the correct values.

Also, I noticed that “NAS” volumes sets “guarantee=none” when thin provisioning is selected.

I was told (a couple years ago by a Netapp consultant) that “guarantee=file” is the preferred in a CIFS/NFS environment.

Out of your on-the-field techies, is “none” or “file” the preferable one to be set when a NAS volume is created?

Thanks

Dejan