On Thu, Jun 8, 2017 at 1:06 PM, Christian Balzer <ch...@gol.com> wrote:
>
> Hello,
>
> New cluster, Jewel, setting up cache-tiering:
> ---
> Error EPERM: 'readforward' is not a well-supported cache mode and may corrupt 
> your data.  pass --yes-i-really-mean-it to force.
> ---
>
> That's new and certainly wasn't there in Hammer, nor did it whine about
> this when upgrading my test cluster to Jewel.
>
> And speaking of whining, I did that about this and readproxy, but not
> their stability (readforward has been working nearly a year flawlessly in
> the test cluster) but their lack of documentation.
>
> So while of course there is no warranty for anything with OSS, is there
> any real reason for the above scaremongering or is that based solely on
> lack of testing/experience?

https://github.com/ceph/ceph/pull/8210 and
https://github.com/ceph/ceph/pull/8210/commits/90fe8e3d0b1ded6d14a6a43ecbd6c8634f691fbe
may offer some insight.

>
> Christian
> --
> Christian Balzer        Network/Systems Engineer
> ch...@gol.com           Rakuten Communications
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-- 
Cheers,
Brad
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