RE: Aggr's at 100% with FlexVols

Hi,

don't know if i am right, but i prefer to have a look at "aggr show_space"

There one can see the "Space allocated to volumes in the aggregate".

As long as there are still free blocks i do not worry about performance although "df -Ah" shows >95%. Nevertheless we always try not to go that far, for reasons of security (e.g. strong growth of a volume due to application-traces). If this is wrong, please correct me.

Best Regards

Jochen

-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Borzenkov, Andrey Sent: Friday, February 01, 2008 7:17 AM To: letta@jlab.org; toasters@mathworks.com Subject: RE: Aggr's at 100% with FlexVols

During update from 7.0 to 7.2 we hit the issue of 100% full aggregate - apparently 7.2 requires more space for metadata which suddenly made aggregate overcommitted and turned off space reservation on some of contained FlexVols. As those hosted LUNs it was not exactly the desired result :)

Resolution was to decrease size of overcommitted FlexVols until space reservation was enabled again. So you may want to leave some safety margin on your aggregate anyway.

�� ��ӧѧا֧ߧڧ֧� / With best regards / Mit freundlichen Gr����en

--- Andrey Borzenkov Senior system engineer -----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Paul Letta Sent: Thursday, January 31, 2008 6:25 PM To: toasters@mathworks.com Subject: Aggr's at 100% with FlexVols

Hi, I know when traditional vols are in use, you don't want to let them get too close to full because performance will be affected.

But what about using FlexVols and Aggrs ?

I have a few Aggrs that are at 100%. But the FlexVols in those Aggrs are mostly under 50%.

I had a NetApp support person tell me that its bad to have Aggrs at 100%, even if the FlexVols are not full.

What's the answer here. Does having Aggrs at 100% because the FlexVols contained in them are sized to fill the Aggr present a performance issue ?

I would think that as long as the flexvols are not close to full, its ok to have the aggr's at 100%.

Thanks,

Paul