Hi,
disclaimer: I haven't used the reclassify function myself yet. But the
output from crushtool looks correct to me and seems to match the
description in the docs. Maybe someone else with more experience sees
something odd but I think this would work as expected.
Regards,
Eugen
Zitat von Mathias Lindberg <mathlin@xxxxxxxxxxx>:
Hi,
We are trying to introduce SSD/NvME OSD’s and to prevent data moving
from current (hdd based) OSD’s while also having erasure coded pools
we could not just simply change the erasure coding profile or create
a new one and just apply it to the pool.
Reading this list and other posts on forums it was suggested to use
the crushtool reclassify to insert device classes into the current
crush rules and load that crush map manually.
Not having edited the crush map in this or any other fashion earlier
I would appreciate very much if I someone could verify if I have
done the reclassify correctly.
Thank you,
[root@cephyr-mon1 crushtest]# crushtool -i crush_comp.c --reclassify
--reclassify-root default hdd -o crush_comp_corr.c
classify_root default (-1) as hdd
renumbering bucket -1 -> -29
renumbering bucket -27 -> -30
renumbering bucket -25 -> -31
renumbering bucket -23 -> -32
renumbering bucket -21 -> -33
renumbering bucket -19 -> -34
renumbering bucket -17 -> -35
renumbering bucket -15 -> -36
renumbering bucket -13 -> -37
renumbering bucket -11 -> -38
renumbering bucket -9 -> -39
renumbering bucket -7 -> -40
renumbering bucket -5 -> -41
renumbering bucket -3 -> -42
[root@cephyr-mon1 crushtest]# crushtool -i crush_comp.c --compare
crush_comp_corr.c
rule 0 had 0/10240 mismatched mappings (0)
rule 6 had 0/10240 mismatched mappings (0)
rule 7 had 0/4096 mismatched mappings (0)
rule 8 had 0/4096 mismatched mappings (0)
rule 9 had 0/4096 mismatched mappings (0)
rule 10 had 0/4096 mismatched mappings (0)
rule 11 had 0/4096 mismatched mappings (0)
rule 12 had 0/4096 mismatched mappings (0)
rule 13 had 0/4096 mismatched mappings (0)
maps appear equivalent
Regards,
Mathias Lindberg
Tel: +46 (0)31 7723059
Mob: +46 (0)723 526107
Mathias Lindberg
mathlin@xxxxxxxxxxx
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