Re: erasured PG always "peering"

[Loic Dachary <loic@dachary.org>]

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Hi

On 12/03/2014 18:40, Lluís Pàmies i Juárez wrote:
> Hi ceph-devel,
> 
> I have been playing with the new erasure code functionality and I have
> noticed that the erasure coded PG remains in "peering" state forever. Is
> that normal?
> 
> I have a scenario with four servers each with two OSDs (total of eight
> OSDs). Then I define the extra crush rule to get four different OSDs across
> hosts:
> 
> rule reedsol_ruleset {
>     ruleset 1
>     type erasure
>     min_size 4
>     max_size 4
>     step take default
>     step chooseleaf firstn 0 type host

You want to s/firstn/indep/ here. But I don't think it's the source of your problem.

From what version are you running (hash of the last commit) ?

Cheers

>     step emit
> }
> 
> And create a simple pool by:
> sudo ceph osd pool create cauchy 1 1 erasure erasure-code-plugin=jerasure
> erasure-code-k=2 erasure-code-m=2 erasure-code-technique=cauchy_good
> crush_ruleset=reedsol_ruleset
> 
> After that, the PG status jumps from "creating" to "peering" and stays
> there forever. With "sudo ceph pg dump_stuck" I can see:
> 
> pg_stat objects mip degr unf bytes log disklog state state_stamp v reported
> up up_primary acting acting_primary last_scrub scrub_stamp last_deep_scrub
> deep_scrub_stamp
> 5.0 0 0 0 0 0 0 0 peering 2014-03-12 10:30:36.717544 0'0 58:3 [0,6,2,5] 0
> [0,6,2,5] 0 0'0 2014-03-12 10:30:36.715589 0'0 2014-03-12 10:30:36.715589
> 
> I guess that this is not normal and I'm probably doing something wrong. Any
> ideas?
> 
> Thanks,
> Lluís
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-- 
Loïc Dachary, Artisan Logiciel Libre


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