I read through most of the documentation on the wiki, though there is
one thing I couldn't find.
The OSD cluster expansion/contraction page lists information on adding a
node, but nothing about removing one.
In particular there are two things I'm curious about.
Firstly, when you want to remove a node (decommissioning the hardware,
etc...) how do you mark it so that ceph will start migrating data away
from it onto other OSDs?
Secondly, how does removing an osd interact with the sequential ids of
OSDs? The importance of that, including not skipping numbers was
underlined strongly on another page.
--
~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name]
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