Be careful with orphans find (was Re: Lost TB for Object storage)

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Hi,

On 19/07/18 17:19, CUZA Frédéric wrote:

> After that we tried to remove the orphans :
> 
> radosgw-admin orphans find –pool= default.rgw.buckets.data
> --job-id=ophans_clean
> 
> radosgw-admin orphans finish --job-id=ophans_clean
> 
> It finds some orphans : 85, but the command finish seems not to work, so
> we decided to manually delete those ophans by piping the output of find
> in a log file.

I would advise caution with using the "orphans find" code in
radosgw-admin. On the advice of our vendor, we ran this and
automatically removed the resulting objects. Unfortunately, a small
proportion of the objects found and removed thus were not in fact
orphans - meaning we ended up with some damaged S3 objects; they
appeared in bucket listings, but you'd get 404 if you tried to download
them.

We have asked our vendor to make the wider community aware of the issue,
but they have not (yet) done so.

Regards,

Matthew


-- 
 The Wellcome Sanger Institute is operated by Genome Research 
 Limited, a charity registered in England with number 1021457 and a 
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