Shit, I added this class and now everything start backfilling (10%) How 
is this possible, I only have hdd's?


-----Original Message-----
From: Konstantin Shalygin [mailto:k0...@k0ste.ru] 
Sent: woensdag 13 juni 2018 9:26
To: Marc Roos; ceph-users
Subject: *****SPAM***** Re: [ceph-users] Add ssd's to hdd cluster, crush 
map class hdd update necessary?

On 06/13/2018 09:01 AM, Marc Roos wrote:
> Yes but I already have some sort of test cluster with data in it. I 
> don’t think there are commands to modify existing rules that are 
being 
> used by pools. And the default replicated_ruleset doesn’t have a 
class 
> specified. I also have an erasure code rule without any class 
> definition for the file system.

Yes, before migration from multi-root/classless crush to luminous+ 
classified crush you need to assign classified rulesets to your pools.
This is safe to apply on production clusters, on EC pools too.






k


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