Re: CephFS "move" operation

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On Fri, May 25, 2018 at 6:46 AM, Oliver Freyermuth
<freyermuth@xxxxxxxxxxxxxxxxxx> wrote:
>> It might be possible to allow rename(2) to proceed in cases where
>> nlink==1, but the behavior will probably seem inconsistent (some files get
>> EXDEV, some don't).
>
> I believe even this would be extremely helpful, performance-wise. At least in our case, hardlinks are seldomly used,
> it's more about data movement between user, group and scratch areas.
> For files with nlinks>1, it's more or less expected a copy has to be performed when crossing quota boundaries (I think).

It may be possible to allow the rename in the MDS and check quotas
there. I've filed a tracker ticket here:
http://tracker.ceph.com/issues/24305


-- 
Patrick Donnelly
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