Re: Understanding Ceph in case of a failure

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Hi,

just for the sake of completeness, here is my decompiled CRUSH map in
case it is needed to further investigate:

> # begin crush map
> tunable choose_local_tries 0
> tunable choose_local_fallback_tries 0
> tunable choose_total_tries 50
> tunable chooseleaf_descend_once 1
> tunable chooseleaf_vary_r 1
> tunable straw_calc_version 1
> 
> # devices
> device 0 osd.0
> device 1 osd.1
> device 2 osd.2
> device 3 osd.3
> device 4 osd.4
> device 5 osd.5
> device 6 osd.6
> device 7 osd.7
> device 8 osd.8
> device 9 osd.9
> device 10 osd.10
> device 11 osd.11
> device 12 osd.12
> device 13 osd.13
> device 14 osd.14
> device 15 osd.15
> device 16 osd.16
> device 17 osd.17
> device 18 osd.18
> device 19 device19
> device 20 osd.20
> device 21 osd.21
> device 22 osd.22
> 
> # types
> type 0 osd
> type 1 host
> type 2 chassis
> type 3 rack
> type 4 row
> type 5 pdu
> type 6 pod
> type 7 room
> type 8 datacenter
> type 9 region
> type 10 root
> 
> # buckets
> host max {
> 	id -2		# do not change unnecessarily
> 	# weight 9.945
> 	alg straw
> 	hash 0	# rjenkins1
> 	item osd.0 weight 0.904
> 	item osd.2 weight 0.904
> 	item osd.3 weight 0.904
> 	item osd.5 weight 0.904
> 	item osd.6 weight 0.904
> 	item osd.7 weight 0.904
> 	item osd.8 weight 0.904
> 	item osd.9 weight 0.904
> 	item osd.10 weight 0.904
> 	item osd.4 weight 0.904
> 	item osd.1 weight 0.904
> }
> host moritz {
> 	id -3		# do not change unnecessarily
> 	# weight 9.934
> 	alg straw
> 	hash 0	# rjenkins1
> 	item osd.12 weight 0.904
> 	item osd.13 weight 0.904
> 	item osd.14 weight 0.904
> 	item osd.15 weight 0.904
> 	item osd.16 weight 0.904
> 	item osd.17 weight 0.904
> 	item osd.18 weight 0.904
> 	item osd.20 weight 0.904
> 	item osd.21 weight 0.904
> 	item osd.11 weight 0.904
> 	item osd.22 weight 0.894
> }
> root default {
> 	id -1		# do not change unnecessarily
> 	# weight 19.879
> 	alg straw
> 	hash 0	# rjenkins1
> 	item max weight 9.945
> 	item moritz weight 9.934
> }
> 
> # rules
> rule replicated_ruleset {
> 	ruleset 0
> 	type replicated
> 	min_size 1
> 	max_size 10
> 	step take default
> 	step chooseleaf firstn 0 type host
> 	step emit
> }

Thank you very much for looking into this ;).

Best regards,
Karol Babioch

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