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Netapp Question

Posted on 2012-03-10
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Last Modified: 2012-03-10
Can someone please explain what is mean by the snapshot being 96% full on the aggregate?  The aggregate snapshot reserver is almost full.  Does this further snapshots may not be able to be captured?  

A Warning event at 09 Mar 12:07 Pacific Standard Time on Aggregate aggr2 on Active/Active Controller heraklesa.pcmt.local:
The snapshot is 96.00% full (using 176 GB of 184 GB).

Click below to see the source of this event.
http://HRKNAOM.PCMT.LOCAL:8080/dfm/report/view/aggregate-details/191?group=0

Click below to see details of this event.
http://HRKNAOM.PCMT.LOCAL:8080/dfm/report/view/event-details/17559?group=0

Click below to see all events.
http://HRKNAOM.PCMT.LOCAL:8080/dfm/report/view/events?group=0

Click below to see the source of this event in the DataFabric Manager server and access the related management page in FilerView.
http://HRKNAOM.PCMT.LOCAL:8080/dfm/report/view/aggregate-details/191?group=0&autoload-fv=21

*** Event details follow.***

General Information
-------------------
DataFabric Manager Serial Number: 1-50-014650
Alarm Identifier: 1

Event Fields
-------------
Event Identifier: 17559
Event Name: Aggregate Snapshot Reserve Almost Full
Event Description: Space utilization of aggregate snap reserve
Event Severity: Warning
Event Timestamp: 09 Mar 12:07

Source of Event
---------------
Source Identifier: 191
Source Name: heraklesa:aggr2
Source Type: Aggregate
Name of the host: heraklesa.pcmt.local
Type of the host: Active/Active Controller
Host identifier: 80

Event Arguments
---------------
dfKBytesTotal: 192604952
dfKBytesPercent: 96
dfMountedOn: aggr2
dfKBytesUsed: 184277668

--NetApp DataFabric Manager
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Question by:amigan_99
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Accepted Solution

by:
paulsolov earned 2000 total points
ID: 37705933
Snapshot reserve is used for accounting purposes, it allows you to know how much space int the volume is a part of the volume that is showign that is in the snapshot reserve and will not be seen by the user.  

Best example I can give is that let's say you have a 500GB CIFS volume and assign 20% for your snapshot reserve.  The users would see a 400GB volume and 100GB would be seen on the system for the snapshot reserve.

As snapshots are being taken they can extend out of the snapshot reserve, at this point you don't if the storage increase in the CIFS volume is based on users adding data or snapshots are growing into the non snapshot reserve area.

At this point let's say you have 95GB in snapshots, your snapshot reserve will show 95% full.  

Netapp requires snapshot clean-up, especially if you're using SMVI, SME, or SMESQL and change backup jobs, the old snapshots become orphaned and will remain until you clean up manually. I have seen customers inadvertently use 30% of their total storage in old snapshots.

As you're using DFM (Operations Manager) it is reporting that one of the volumes or aggr snapshot reserve is almost full.  Please review and see if there are snapshots to clean up or make your snapshot schedule less agressive.

Hope this helps.
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LVL 1

Author Closing Comment

by:amigan_99
ID: 37705965
Thank you so much.  Our storage guy left the company a few weeks ago and his replacement will not be on board for a few more weeks.  So I appreciate the insight!
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LVL 42

Expert Comment

by:paulsolov
ID: 37705991
No problem.  Did you figure out the .Net issue with the VI client?
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