Hey,
I am trying to implement a new erasure code in ceph. I am running into a
few problems and I am hoping you guys may be able to help me.
1. For my erasure scheme, I am each OSD to not send me the entire chunk
but some (pre-defined) function of that. Is there already some
infrastructure setup to do that? Or if not, where exactly can I
implement it?
2. In my current vstart setup, I find that setting an osd as OUT will
create a new remapped pg. In the below example, I have a total of 7 osds
with the erasure scheme of reed_sol_van with k=5 and m=2
$ ceph pg map 8.0 # Id if my erasure coded pool
osdmap e60 pg 8.0 (8.0) -> up [3,5,1,4,2,6,0] acting [3,5,1,4,2,6,0]
$ ceph osd out 0
marked out osd.0.
# after a few seconds
$ ceph pg map 8.0
osdmap e63 pg 8.0 (8.0) -> up [3,5,1,4,2147483647,6,2] acting
[3,5,1,4,2,6,2]
Does this create a new PG out of somewhere? Even the health of the
cluster is HEALTH_OK. How can I make sure that the cluster runs in a
degraded state so that I can check, when I deploy my erasure code, that
it is indeed working correctly?
Thank you for your help.
Aaditya M Nair
IIIT - Hyderabad
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