Re: Criteria behind disk scrubbing policy

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Hi Sage,
Thanks for your answers
> 
> In Ceph clusters disks are generally never powered down.  It sounds like 
> Schwarz et al were studying a different type of storage system.  In our 
> case, it's all about how quickly you discover a defect and repair around 
> it.

Indeed, he was studying archival storage. I’m interested in both system types.
> 
> We do let you change the scrub intervals on a per-pool basis as well (see 
> pool_opts in osd/osd_types.h), so you can adjust the policy based on both 
> the pool type (replicated vs erasure coded) or the importance of the data 
> it contains.
> 

That setting is exactly what I was expecting ceph should have. Do you have any study done about choosing scrub intervals policy on replicated/erasured pools?

Best,
Vero--
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