Re: rgw: strong consistency for (bucket) policy settings?

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On Mon, Sep 11, 2023 at 02:37:59PM -0400, Matt Benjamin wrote:
> Yes, it's also strongly consistent.  It's also last writer wins, though, so
> two clients somehow permitted to contend for updating policy could
> overwrite each other's changes, just as with objects.

Hi, thank you for confirming this!

Matthias
> 
> On Mon, Sep 11, 2023 at 2:21 PM Matthias Ferdinand <mf+ml.ceph@xxxxxxxxx>
> wrote:
> 
> > Hi,
> >
> > while I don't currently use rgw, I still am curious about consistency
> > guarantees.
> >
> > Usually, S3 has strong read-after-write consistency guarantees (for
> > requests that do not overlap). According to
> >     https://docs.ceph.com/en/latest/dev/radosgw/bucket_index/
> > in Ceph this is also true for per-object ACLs.
> >
> > Is there also a strong consistency guarantee for (bucket) policies? The
> > documentation at
> >     https://docs.ceph.com/en/latest/radosgw/bucketpolicy/
> > apparently does not say anything about this.
> >
> > How would multiple rgw instances synchronize a policy change? Is this
> > effective immediate with strong consistency or is there some propagation
> > delay (hopefully on with some upper bound)?
> >
> >
> > Best regards
> > Matthias
> > _______________________________________________
> > ceph-users mailing list -- ceph-users@xxxxxxx
> > To unsubscribe send an email to ceph-users-leave@xxxxxxx
> >
> >
> 
> -- 
> 
> Matt Benjamin
> Red Hat, Inc.
> 315 West Huron Street, Suite 140A
> Ann Arbor, Michigan 48103
> 
> http://www.redhat.com/en/technologies/storage
> 
> tel.  734-821-5101
> fax.  734-769-8938
> cel.  734-216-5309
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