I am carrying out with the ceph charms (-osd, -mon, -radosgw, -fs) the deployment of a cluster of 5 nodes with 4 OSD each. The objective is to use pools with erasure code k=5 and m=2 in order to maximize usable storage without losing too much reliability.
Since my configuration involves splitting the data into 7 chunks, I am aware that the failure domain should be “osd” instead of “host”. However, I am not finding a way to customize the fault domain to what I need (“osd” instead “host”) in the charm settings. Is this possible?
I only find the boolean variable “customize-failure-domain” (in the osd and mon charms) that allows me to indicate if I want to inherit the map generated by MAAS (true) or forcefully use “host” as failure domain (false)
Could someone here clarify for me how I can set the failure domain as “osd” from the charms themselves?
Postscript, if this is not the correct place to make these questions, I would appreciate it if you could tell me which would be the appropriate channel.
Thank you so much