I built a new crush map using crushtool with the following settings:
crushtool --outfn testcrush --build --num-osds 10 host straw 2 rack straw 2
default straw 0
This results in the following crushmap, to which I added a custom replication
rule "myrtle".
When I run crushtool to test my new crush map and rule I anticipate output
similar to this:
crushtool -i crushmap --test --show-statistics --rule 1 --min-x 1 --max-x 2
--num-rep 2
rule 1 (myrule), x = 1..2, numrep = 2..2
CRUSH rule 1 x 1 [0,2]
CRUSH rule 1 x 2 [7,4]
rule 1 (myrule) num_rep 2 result size == 2: 2/2
However the output I am getting is the following:
rule 1 (myrule), x = 1..2, numrep = 2..2
rule 1 (myrule) num_rep 2 result size == 2: 2/2
I was expecting to see the placement groups for my test rule however I see only
the summary in my output. Am I missing crushtool parameters or environment
configuration settings?
Any guidance would be greatly appreciated.
Thanks,
Fred Merlo
# 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 straw_calc_version 1
# devices
device 0 device0
device 1 device1
device 2 device2
device 3 device3
device 4 device4
device 5 device5
device 6 device6
device 7 device7
device 8 device8
device 9 device9
# types
type 0 device
type 1 host
type 2 rack
type 3 default
# buckets
host host0 {
id -1 # do not change unnecessarily
# weight 2.000
alg straw
hash 0 # rjenkins1
item device0 weight 1.000
item device1 weight 1.000
}
host host1 {
id -2 # do not change unnecessarily
# weight 2.000
alg straw
hash 0 # rjenkins1
item device2 weight 1.000
item device3 weight 1.000
}
host host2 {
id -3 # do not change unnecessarily
# weight 2.000
alg straw
hash 0 # rjenkins1
item device4 weight 1.000
item device5 weight 1.000
}
host host3 {
id -4 # do not change unnecessarily
# weight 2.000
alg straw
hash 0 # rjenkins1
item device6 weight 1.000
item device7 weight 1.000
}
host host4 {
id -5 # do not change unnecessarily
# weight 2.000
alg straw
hash 0 # rjenkins1
item device8 weight 1.000
item device9 weight 1.000
}
rack rack0 {
id -6 # do not change unnecessarily
# weight 4.000
alg straw
hash 0 # rjenkins1
item host0 weight 2.000
item host1 weight 2.000
}
rack rack1 {
id -7 # do not change unnecessarily
# weight 4.000
alg straw
hash 0 # rjenkins1
item host2 weight 2.000
item host3 weight 2.000
}
rack rack2 {
id -8 # do not change unnecessarily
# weight 2.000
alg straw
hash 0 # rjenkins1
item host4 weight 2.000
}
default default {
id -9 # do not change unnecessarily
# weight 10.000
alg straw
hash 0 # rjenkins1
item rack0 weight 4.000
item rack1 weight 4.000
item rack2 weight 2.000
}
# 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
}
rule myrule {
ruleset 1
type replicated
min_size 1
max_size 10
step take default
step choose firstn 2 type rack
step chooseleaf firstn 2 type host
step emit
}
# end crush map
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