Am 04.09.2013 11:24, schrieb Jens-Christian Fischer:
And that is the problem: The SSDs are in the same physical servers as the SATA drives. Adding them to the hosts adds them into the hierarchy. Adding them to "virtual hosts" (a host name that doesn't exist) breaks the startup scripts.
Can I add the SSD OSDs directly to a new root without having them in the host hierarchy?
If you have a solution that solves either of these problems, I'm all ears :)
What about this? Each host (server) has 2 hdds and 1 ssd. Data is always
replicated over hosts, so if a complete host goes down, everything still works.
Works great for me :-)
*******************
# id weight type name up/down reweight
-4 2.25 root ssd
-2 0.45 host h102-ssd
0 0.45 osd.0 up 1
-5 0.45 host h103-ssd
3 0.45 osd.3 up 1
-6 0.45 host h104-ssd
6 0.45 osd.6 up 1
-7 0.45 host h105-ssd
9 0.45 osd.9 up 1
-8 0.45 host h106-ssd
12 0.45 osd.12 up 1
-1 26.1 root hdd
-3 5.8 host h102-hdd
1 2.9 osd.1 up 1
2 2.9 osd.2 up 1
-9 5.8 host h103-hdd
4 2.9 osd.4 up 1
5 2.9 osd.5 up 1
-10 5.8 host h104-hdd
7 2.9 osd.7 up 1
8 2.9 osd.8 up 1
-11 5.8 host h105-hdd
10 2.9 osd.10 up 1
11 2.9 osd.11 up 1
-12 2.9 host h106-hdd
13 2.9 osd.13 up 1
14 2.9 osd.14 up 1
*******************
host h102-hdd {
id -3 # do not change unnecessarily
# weight 5.800
alg straw
hash 0 # rjenkins1
item osd.1 weight 2.900
item osd.2 weight 2.900
}
host h103-hdd {
id -9 # do not change unnecessarily
# weight 5.800
alg straw
hash 0 # rjenkins1
item osd.4 weight 2.900
item osd.5 weight 2.900
}
host h104-hdd {
id -10 # do not change unnecessarily
# weight 5.800
alg straw
hash 0 # rjenkins1
item osd.7 weight 2.900
item osd.8 weight 2.900
}
host h105-hdd {
id -11 # do not change unnecessarily
# weight 5.800
alg straw
hash 0 # rjenkins1
item osd.10 weight 2.900
item osd.11 weight 2.900
}
host h106-hdd {
id -12 # do not change unnecessarily
# weight 2.900
alg straw
hash 0 # rjenkins1
item osd.13 weight 2.900
item osd.14 weight 2.900
}
root hdd {
id -1 # do not change unnecessarily
# weight 26.100
alg straw
hash 0 # rjenkins1
item h102-hdd weight 5.800
item h103-hdd weight 5.800
item h104-hdd weight 5.800
item h105-hdd weight 5.800
item h106-hdd weight 2.900
}
host h102-ssd {
id -2 # do not change unnecessarily
# weight 0.450
alg straw
hash 0 # rjenkins1
item osd.0 weight 0.450
}
host h103-ssd {
id -5 # do not change unnecessarily
# weight 0.450
alg straw
hash 0 # rjenkins1
item osd.3 weight 0.450
}
host h104-ssd {
id -6 # do not change unnecessarily
# weight 0.450
alg straw
hash 0 # rjenkins1
item osd.6 weight 0.450
}
host h105-ssd {
id -7 # do not change unnecessarily
# weight 0.450
alg straw
hash 0 # rjenkins1
item osd.9 weight 0.450
}
host h106-ssd {
id -8 # do not change unnecessarily
# weight 0.450
alg straw
hash 0 # rjenkins1
item osd.12 weight 0.450
}
root ssd {
id -4 # do not change unnecessarily
# weight 2.250
alg straw
hash 0 # rjenkins1
item h102-ssd weight 0.450
item h103-ssd weight 0.450
item h104-ssd weight 0.450
item h105-ssd weight 0.450
item h106-ssd weight 0.450
}
# rules
rule ssd {
ruleset 0
type replicated
min_size 1
max_size 10
step take ssd
step chooseleaf firstn 0 type host
step emit
}
rule hdd {
ruleset 1
type replicated
min_size 1
max_size 10
step take hdd
step chooseleaf firstn 0 type host
step emit
}
*******************
pool 5 'ssd-storage' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins
pg_num 4096 pgp_num 4096 last_change 29 owner 0
pool 6 'hdd-storage' rep size 2 min_size 1 crush_ruleset 1 object_hash rjenkins
pg_num 4096 pgp_num 4096 last_change 30 owner 0
*******************
Corin
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