By the way, since there’s some probability that this is a GC refcount issue, 
would it be possible and sane to somehow slow the GC down or disable it 
altogether? Is that something we could implement on our end as a stop-gap 
measure to prevent dataloss?

> On 18 Nov 2020, at 10:46, Denis Krienbühl <de...@href.ch> wrote:
> 
> I can now confirm that last night’s missing object was a multi-part file.
> 
>> On 18 Nov 2020, at 10:01, Janek Bevendorff <janek.bevendo...@uni-weimar.de> 
>> wrote:
>> 
>> Sorry, it's radosgw-admin object stat --bucket=BUCKETNAME 
>> --object=OBJECTNAME (forgot the "object" there)
>> 
>> On 18/11/2020 09:58, Janek Bevendorff wrote:
>>>> 
>>>> The object, a Docker layer, that went missing has not been touched in 2 
>>>> months. It worked for a while, but then suddenly went missing.
>>> Was the object a multipart object? You can check by running radosgw-admin 
>>> stat --bucket=BUCKETNAME --object=OBJECTNAME. It should say something "ns": 
>>> "multipart" in the output. If it says "ns": "shadow", it's a single-part 
>>> object.
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