Re: Space issues on older NetApp...

I do remember faintly the Dedupe Metadata bug, that was persistent 
through quite a few 8.1 releases.
It would cause "inexplicable" space loss, because the metadata would 
just grow and grow...

Are all controllers (source & destination) on the same patch release 
(8.1.4P10?)?
Is there a reason not to update them to 8.2.5P5?

IIRC 8.2.5 at the latest had the problem solved...


/Sebastian


On 05.08.2022 16:31, Heino Walther wrote:
>
> Hi there
>
> We have two systems that mirror eachothers volumes via snapmirror.
>
> We are talking 7mode ONTAP 8.1.4
>
> The two systems have the same controller: FAS3240
>
> They have the same disks and aggregate configuration (70TB aggregates)
>
> On the source side we use volumes that are thin-provisioned with LUNs 
> that have space reservation enabled, the LUNs are mostly close to 16TB 
> (which is max)
>
> All volumes are snapmirrored to volumes on the destination system with 
> the same size and placed on the same aggregates that mirror the source 
> aggregates in size…
>
> The aggregates on the source are all below 95% used.
>
> Yet.. we are now at the situation where a few destination aggregates 
> are 100% full, while the source aggregates are still under 95% used…
>
> I have checked almost everything, like aggregate snapshot reserves 
> etc..  but they should be the same…
>
> Can anyone explain why this can happen?
>
> We are of cause at a “deadlock” now.. I don’t think we can add anymore 
> disks to the aggregates as they are max size…
>
> The only think I can think of is either delete a volume from the 
> affected aggregates, and re-sync the volume and hope it doesn’t fill 
> up again…
>
> Another way would be to add disks and build a new aggregate, and move 
> some of the volumes…
>
> Is there something I have missed? 😊
>
> /Heino
>
>
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