You can't have a server with both SSDs and HDDs in this setup because you
can't write a crush rule that is able to pick n distinct servers when also
specifying different device classes.
A crush rule for this looks like this:
step take default class=ssd
step choose firstn 1 type host
emit
step
Hi All,
I looking at starting to move my deployed ceph cluster to SSD.
As a first step my though is to get a large enough set of SSD
expantion that I can set crush map to ensure 1 copy of every
(important) PG is on SSD and use primary affinity to ensure that copy
is primary.
I know this won't
